JP6771356B2 - Energy supply system - Google Patents

Description

According to the present invention, when a fuel gas non-consumption state that satisfies a predetermined determination condition including a state in which the flow rate of the fuel gas is equal to or less than the set determination amount continues for the set determination time or more does not occur during the leakage determination period. Controls the operation of an energy supply unit including a microcomputer meter that activates an alarm or cuts off the supply of fuel gas, a power generation unit that generates power using fuel gas supplied via the microcomputer meter, and an energy supply unit. The present invention relates to an energy supply system including an operation control unit.

If the fuel gas non-consumption state that satisfies a predetermined judgment condition including the state where the flow rate of the fuel gas is equal to or less than the set judgment amount continues for the set judgment time or more does not occur during the leakage judgment period, the microcomputer meter will display the microcomputer meter. Activate an alarm or shut off the fuel gas supply. When the microcomputer meter activates an alarm, for example, the worker who receives the report has to cut off the supply of fuel gas and inspect whether or not the fuel gas is actually leaking. Further, when the microcomputer meter cuts off the supply of fuel gas, it is troublesome to perform an operation to restore the microcomputer meter to the fuel gas supply state. Therefore, it is preferable that the microcomputer meter can avoid the alarm operation due to the fact that the fuel gas non-consumption state does not occur during the leakage determination period and can avoid shutting off the fuel gas supply.

However, in an energy supply system provided with a power generation unit that generates power using fuel gas supplied via a microcomputer meter, the power generation unit is relatively relatively started and stopped instead of repeatedly operating and stopping the power generation unit. It is often operated continuously for a long period of time. Therefore, when the power generation unit continues to operate beyond the leakage determination period (for example, 30 days), the duration of the continuation of the state in which the flow rate of the fuel gas is equal to or less than the set determination amount (for example, 1.0 L / h). Since the fuel gas non-consumption state required based on the above does not occur during the leak determination period, a situation occurs in which the microcomputer meter activates an alarm or shuts off the fuel gas supply.

In the energy supply system described in Patent Document 1, the operation of the power generation unit is stopped on a day (28 days) corresponding to 2 days before the leakage determination period (30 days) or a day (29 days) corresponding to 1 day before. Then, after the operation of the power generation unit is stopped, it is determined whether or not the time during which the fuel gas is not supplied to the energy supply unit continues for a predetermined time (60 minutes) corresponding to the set duration (60 minutes). When the predetermined time is continued, it is configured to restart the power generation unit assuming that the start prohibition release condition is satisfied.
The energy supply system described in Patent Document 2 shuts down the power generation unit all day on a day (27 days) corresponding to 3 days before the leakage determination period (30 days), and starts up after one day has passed. It is configured so that the operation of the power generation unit is permitted in a state where the prohibition release condition is satisfied.

As described above, in the energy supply system described in Patent Document 1 and Patent Document 2, at least the period in which the fuel gas is not consumed in the power generation unit is set before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. By intentionally providing it, we are trying to generate a fuel gas non-consumption state.

Japanese Unexamined Patent Publication No. 2005-353292 Japanese Unexamined Patent Publication No. 2008-190755

It is not only the power generation unit that fuel gas is supplied via the microcomputer meter. For example, a heat medium heating operation is performed in an energy supply system to heat a heating heat medium for heating a heating target space by using combustion heat obtained by burning fuel gas supplied via a microcomputer meter. A combustor for heating may be provided. Therefore, when the heating start condition is satisfied by instructing the user to start the operation of the heating device, the fuel gas is used to heat the heating heat medium until the heating stop condition is satisfied by instructing the operation stop. Will be consumed.

Then, when continuous combustion is performed in the heating combustor, and intermittent combustion in the heating combustor is performed in a state where the length of the combustion stop period is shorter than the above setting determination time. If so, the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted will not be shorter than the above setting determination time, so that the determination condition that the fuel gas non-consumption state has occurred is considered to have occurred. Never be satisfied. In other words, even if an attempt is made to intentionally generate a non-consumed fuel gas state by not consuming fuel gas at least in the power generation section, the fuel gas is used in the heating combustor to heat the heating heat medium. Once burned, no fuel gas non-consumption state occurs. In addition, the execution of the leakage determination avoidance stop process of stopping the operation of the power generation unit is wasted.

The present invention has been made in view of the above problems, and an object of the present invention is that even if fuel is consumed for heating while the stop processing for avoiding leakage determination is being executed, the fuel gas is not consumed. The point is to provide an energy supply system that can appropriately bring about.

The characteristic configuration of the energy supply system according to the present invention for achieving the above object is a fuel gas satisfying a predetermined determination condition including a state in which the flow rate of the fuel gas is equal to or less than the set determination amount for the set determination time or more. When the non-consumption state does not occur during the leakage judgment period, a microcomputer meter that activates an alarm or shuts off the fuel gas supply and a power generation unit that generates energy using the fuel gas supplied via the microcomputer meter It is provided with an energy supply unit and an operation control unit that controls the operation of the energy supply unit.
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Ri length der,
The energy supply unit has an antifreeze combustor that heats an antifreeze target by using combustion heat obtained by burning fuel gas supplied via the microcomputer meter.
The operation control unit
If the anti-freezing start condition is satisfied while the stop process for avoiding leakage determination is not executed, the anti-freezing operation process for combusting and operating the anti-freezing combustor is executed.
When the heat medium heating operation of the heating combustor is performed by the intermittent combustion while the leakage determination avoidance stop process is being executed, the combustion continues after the antifreeze start condition is satisfied. The point is that the antifreeze combustor is combusted and operated within the period to execute the antifreeze operation process, and the antifreeze combustor is not combusted and operated within the combustion stop period .
According to the above-mentioned feature configuration, when the heating start condition is satisfied while the operation control unit is executing the leakage determination avoidance stop process for stopping the operation of the power generation unit, the operation control unit is used for heating until the heating stop condition is satisfied. The heat medium heating operation of the combustor is performed by intermittent combustion of fuel gas. Here, the length of the fuel stop period for intermittent combustion is longer than the set determination time. That is, even while the fuel gas is intermittently burned by the heating combustor, the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is longer than the above setting determination time, so that the fuel gas is not used. There may be a time when the determination condition that the consumption state is considered to have occurred is satisfied. As a result, fuel is used in the heating combustor while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming the fuel gas. Even if the gas is burned, the execution of the stop processing for avoiding leakage determination, which is to stop the operation of the power generation unit, is not wasted.
In addition, even if the combustion stop period in intermittent combustion becomes longer than the set judgment time, the heating heat medium is not heated by the combustion heat during that period, but the heating heat medium maintains a certain temperature. If so, the temperature of the heating target space does not drop sharply. As a result, if the combustion continuation period and the combustion stop period are alternately repeated by the intermittent combustion of the fuel gas, the purpose of warming the heating target space is to warm the space to be heated even if the combustion stop period is longer than the set judgment time. Fully achieved.
Further, if the freeze prevention start condition is satisfied while the leakage determination avoidance stop process is not executed, the operation control unit executes the freeze prevention operation process for combusting the antifreeze combustor. As a result, the antifreeze object is heated to prevent its freezing.
On the other hand, when the operation control unit is performing the heat medium heating operation of the heating combustor by intermittent combustion while executing the stop processing for avoiding leakage judgment, the freeze prevention start condition is satisfied. During the subsequent combustion continuation period, the antifreeze combustor is combusted to execute the antifreeze operation process, and the antifreeze combustor is not combusted within the combustion stop period. That is, when the heat medium heating operation of the heating combustor is performed by intermittent combustion while the leakage judgment avoidance stop process is being executed, even if the antifreeze combustor is combusted, it is the combustion for heating. Limited to the duration of combustion in which the fuel gas is burned in the vessel. As a result, the combustion combustor for heating and freezing are performed while the stop processing for avoiding leakage determination is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming fuel gas. Even if the fuel gas is burned by the preventive combustor, it is ensured that at least the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is equal to or longer than the above setting determination time.
Therefore, it is possible to provide an energy supply system that can appropriately bring about a non-consumption state of fuel gas even if fuel is consumed for heating while the stop processing for avoiding leakage determination is being executed.

Another characteristic configuration of the energy supply system according to the present invention is that a fuel gas non-consumption state that satisfies a predetermined determination condition including a state in which the flow rate of the fuel gas is equal to or less than the set determination amount continues for the set determination time or more is leaked. An energy supply unit including a microcomputer meter that activates an alarm or cuts off the supply of fuel gas when it does not occur during the judgment period, and a power generation unit that generates power using the fuel gas supplied via the microcomputer meter. It is equipped with an operation control unit that controls the operation of the energy supply unit.
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Is the length
The power generation unit includes a reforming processing apparatus that performs a hydrogen gas generation process that steam reforms the fuel gas to generate hydrogen gas, and a fuel cell that performs a power generation operation using the hydrogen gas generated by the hydrogen gas generation process. And have
The operation control unit
When the power generation unit is stopped, the fuel supplied to the pressure-holding target area inside the power generation unit via the microcomputer meter after stopping the hydrogen gas generation process in the reforming processing apparatus. While the first filling process of filling with gas and sealing with the pressure in the pressure-holding target region set to the first set appropriate pressure or higher is executed, and then the stop process for avoiding leakage determination is not executed. When the replenishment start condition is satisfied by reducing the pressure in the pressure holding target region to the first lower limit pressure lower than the first set appropriate pressure, the fuel gas is replenished inside the power generation unit and the pressure holding target The first pressure holding process for making the pressure in the region equal to or higher than the first set appropriate pressure is executed.
When the heat medium heating operation of the heating combustor is performed by the intermittent combustion while the leakage determination avoidance stop process is being executed, the combustion continuation period after the replenishment start condition is satisfied. The point is that the first holding pressure treatment is executed within the period, and the first holding pressure treatment is not executed within the combustion stop period.
According to the above-mentioned feature configuration, when the heating start condition is satisfied while the operation control unit is executing the leakage determination avoidance stop process for stopping the operation of the power generation unit, the operation control unit is used for heating until the heating stop condition is satisfied. The heat medium heating operation of the combustor is performed by intermittent combustion of fuel gas. Here, the length of the fuel stop period for intermittent combustion is longer than the set determination time. That is, even while the fuel gas is intermittently burned by the heating combustor, the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is longer than the above setting determination time, so that the fuel gas is not used. There may be a time when the determination condition that the consumption state is considered to have occurred is satisfied. As a result, fuel is used in the heating combustor while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming the fuel gas. Even if the gas is burned, the execution of the stop processing for avoiding leakage determination, which is to stop the operation of the power generation unit, is not wasted.
In addition, even if the combustion stop period in intermittent combustion becomes longer than the set judgment time, the heating heat medium is not heated by the combustion heat during that period, but the heating heat medium maintains a certain temperature. If so, the temperature of the heating target space does not drop sharply. As a result, if the combustion continuation period and the combustion stop period are alternately repeated by the intermittent combustion of the fuel gas, the purpose of warming the heating target space is to warm the space to be heated even if the combustion stop period is longer than the set judgment time. Fully achieved.
In addition, the operation control unit replenishes the inside of the power generation unit with fuel gas and executes the first pressure holding process to make the pressure in the pressure holding target area equal to or higher than the first set appropriate pressure, thereby oxygenating the pressure holding target area. It is possible to prevent (air) and the like from entering. Therefore, oxidative deterioration of the catalyst in the pressure-holding target region can be suppressed.
In addition, when the operation control unit is performing the heat medium heating operation of the heating combustor by intermittent combustion while executing the stop processing for avoiding leakage determination, the combustion after the replenishment start condition is satisfied. The first holding pressure treatment is executed within the continuation period, and the first holding pressure treatment is not executed within the combustion stop period. That is, when the heat medium heating operation of the heating combustor is performed by intermittent combustion while the stop processing for avoiding leakage judgment is being executed, even if the first compensating treatment is performed and the fuel gas is consumed. It is limited to the duration of combustion in which the fuel gas is burned in the heating combustor. As a result, fuel is used in the heating combustor while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming the fuel gas. Even if the gas is burned and the fuel gas is consumed in the first compression treatment, it is ensured that at least the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted exceeds the above setting determination time. To.
Therefore, it is possible to provide an energy supply system capable of appropriately bringing about a non-consumption state of fuel gas even if fuel is consumed for heating while the stop processing for avoiding leakage determination is being executed.

Yet another characteristic configuration of the energy supply system according to the present invention is a fuel gas non-consumption state that satisfies a predetermined determination condition including a state in which the flow rate of the fuel gas is equal to or less than the set determination amount for the set determination time or more. An energy supply unit including a microcomputer meter that activates an alarm or cuts off the supply of fuel gas when it does not occur during the leakage determination period, and a power generation unit that generates power using the fuel gas supplied via the microcomputer meter. And an operation control unit that controls the operation of the energy supply unit.
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Is the length
When the operation control unit is stopped using the fuel gas supplied via the microcomputer meter in the energy supply unit while the leakage determination avoidance stop process is being executed, the operation control unit is stopped.
When the combustion start timing of the fuel gas in the combustion continuation period in the heat medium heating operation of the heating combustor comes, the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. The point is that the combustion of the fuel gas in the combustion continuation period in the heat medium heating operation of the heating combustor is started after the elapsed time from the time becomes equal to or longer than the setting determination time.
According to the above-mentioned feature configuration, when the heating start condition is satisfied while the operation control unit is executing the leakage determination avoidance stop process for stopping the operation of the power generation unit, the operation control unit is used for heating until the heating stop condition is satisfied. The heat medium heating operation of the combustor is performed by intermittent combustion of fuel gas. Here, the length of the fuel stop period for intermittent combustion is longer than the set determination time. That is, even while the fuel gas is intermittently burned by the heating combustor, the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is longer than the above setting determination time, so that the fuel gas is not used. There may be a time when the determination condition that the consumption state is considered to have occurred is satisfied. As a result, fuel is used in the heating combustor while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming the fuel gas. Even if the gas is burned, the execution of the stop processing for avoiding leakage determination, which is to stop the operation of the power generation unit, is not wasted.
In addition, even if the combustion stop period in intermittent combustion becomes longer than the set judgment time, the heating heat medium is not heated by the combustion heat during that period, but the heating heat medium maintains a certain temperature. If so, the temperature of the heating target space does not drop sharply. As a result, if the combustion continuation period and the combustion stop period are alternately repeated by the intermittent combustion of the fuel gas, the purpose of warming the heating target space is to warm the space to be heated even if the combustion stop period is longer than the set judgment time. Fully achieved.
In addition, the interval between the stop of use of the fuel gas supplied via the microcomputer meter in the energy supply unit and the next use of the fuel gas for the heat medium heating operation of the heating combustor is as described above. It will be more than the setting judgment time. That is, after the use of the fuel gas in the energy supply unit is stopped, the fuel gas is not burned (intermittent combustion) during the combustion continuation period in the heat medium heating operation of the heating combustor. There may be a time when the judgment condition that the consumption state is considered to have occurred is satisfied. As a result, fuel is used in the heating combustor while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming the fuel gas. Even if the gas is burned, it is ensured that at least the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is equal to or longer than the above setting determination time.
Therefore, it is possible to provide an energy supply system capable of appropriately bringing about a non-consumption state of fuel gas even if fuel is consumed for heating while the stop processing for avoiding leakage determination is being executed.

Yet another characteristic configuration of the energy supply system according to the present invention is a fuel gas non-consumption state that satisfies a predetermined determination condition including a state in which the flow rate of the fuel gas is equal to or less than the set determination amount for the set determination time or more. An energy supply unit including a microcomputer meter that activates an alarm or cuts off the supply of fuel gas when it does not occur during the leakage determination period, and a power generation unit that generates power using the fuel gas supplied via the microcomputer meter. And an operation control unit that controls the operation of the energy supply unit.
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Is the length
The energy supply unit has an antifreeze combustor that heats an antifreeze target with combustion heat obtained by burning fuel gas supplied via the microcomputer meter.
The operation control unit
If the anti-freezing start condition is satisfied while the stop process for avoiding leakage determination is not executed, the anti-freezing operation process for combusting and operating the anti-freezing combustor is executed.
When the freeze prevention start condition is satisfied while the leakage determination avoidance stop process is being executed, the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. After the elapsed time from the stop is equal to or longer than the set determination time, the antifreezing combustor is combusted to start the antifreezing operation process.
According to the above-mentioned feature configuration, when the heating start condition is satisfied while the operation control unit is executing the leakage determination avoidance stop process for stopping the operation of the power generation unit, the operation control unit is used for heating until the heating stop condition is satisfied. The heat medium heating operation of the combustor is performed by intermittent combustion of fuel gas. Here, the length of the fuel stop period for intermittent combustion is longer than the set determination time. That is, even while the fuel gas is intermittently burned by the heating combustor, the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is longer than the above setting determination time, so that the fuel gas is not used. There may be a time when the determination condition that the consumption state is considered to have occurred is satisfied. As a result, fuel is used in the heating combustor while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming the fuel gas. Even if the gas is burned, the execution of the stop processing for avoiding leakage determination, which is to stop the operation of the power generation unit, is not wasted.
In addition, even if the combustion stop period in intermittent combustion becomes longer than the set judgment time, the heating heat medium is not heated by the combustion heat during that period, but the heating heat medium maintains a certain temperature. If so, the temperature of the heating target space does not drop sharply. As a result, if the combustion continuation period and the combustion stop period are alternately repeated by the intermittent combustion of the fuel gas, the purpose of warming the heating target space is to warm the space to be heated even if the combustion stop period is longer than the set judgment time. Fully achieved.
In addition, the interval between the stop of use of the fuel gas supplied via the microcomputer meter in the energy supply unit and the next combustion operation of the fuel gas in the antifreeze combustor is longer than the above setting determination time. Become. That is, there may be a period during which the determination condition that the fuel gas non-consumption state is considered to have occurred is satisfied. As a result, the antifreeze combustor is used while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a fuel gas non-consumption state by not consuming the fuel gas. Even if the fuel gas is burned, it is ensured that at least the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is equal to or longer than the above setting determination time.
Therefore, it is possible to provide an energy supply system that can appropriately bring about a non-consumption state of fuel gas even if fuel is consumed for heating while the stop processing for avoiding leakage determination is being executed.

Yet another characteristic configuration of the energy supply system according to the present invention is a fuel gas non-consumption state that satisfies a predetermined determination condition including a state in which the flow rate of the fuel gas is equal to or less than the set determination amount for the set determination time or more. An energy supply unit including a microcomputer meter that activates an alarm or cuts off the supply of fuel gas when it does not occur during the leakage determination period, and a power generation unit that generates power using the fuel gas supplied via the microcomputer meter. And an operation control unit that controls the operation of the energy supply unit.
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Is the length
The power generation unit includes a reforming processing apparatus that performs a hydrogen gas generation process that steam reforms the fuel gas to generate hydrogen gas, and a fuel cell that performs a power generation operation using the hydrogen gas generated by the hydrogen gas generation process. And have
The operation control unit
When the power generation unit is stopped, the fuel supplied to the pressure-holding target area inside the power generation unit via the microcomputer meter after stopping the hydrogen gas generation process in the reforming processing apparatus. A first filling process is executed in which gas is filled and the pressure in the pressure-holding target region is set to be equal to or higher than the first set appropriate pressure, and then the pressure in the pressure-holding target region is set to the first set appropriate. When the replenishment start condition is satisfied by lowering to the first lower limit pressure less than the pressure, the fuel gas is replenished inside the power generation unit to make the pressure in the pressure holding target region equal to or higher than the first set appropriate pressure. 1 Execute pressure holding process,
When the replenishment start condition is satisfied while the leakage determination avoidance stop process is being executed, when the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. The point is that the fuel gas is replenished inside the power generation unit and the first pressure holding process is started after the elapsed time from the stop is equal to or longer than the set determination time.
According to the above-mentioned feature configuration, when the heating start condition is satisfied while the operation control unit is executing the leakage determination avoidance stop process for stopping the operation of the power generation unit, the operation control unit is used for heating until the heating stop condition is satisfied. The heat medium heating operation of the combustor is performed by intermittent combustion of fuel gas. Here, the length of the fuel stop period for intermittent combustion is longer than the set determination time. That is, even while the fuel gas is intermittently burned by the heating combustor, the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is longer than the above setting determination time, so that the fuel gas is not used. There may be a time when the determination condition that the consumption state is considered to have occurred is satisfied. As a result, fuel is used in the heating combustor while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming the fuel gas. Even if the gas is burned, the execution of the stop processing for avoiding leakage determination, which is to stop the operation of the power generation unit, is not wasted.
In addition, even if the combustion stop period in intermittent combustion becomes longer than the set judgment time, the heating heat medium is not heated by the combustion heat during that period, but the heating heat medium maintains a certain temperature. If so, the temperature of the heating target space does not drop sharply. As a result, if the combustion continuation period and the combustion stop period are alternately repeated by the intermittent combustion of the fuel gas, the purpose of warming the heating target space is to warm the space to be heated even if the combustion stop period is longer than the set judgment time. Fully achieved.
Further, the interval from when the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped until the next use of the fuel gas for the first holding pressure treatment is equal to or longer than the above setting determination time. become. That is, there may be a period during which the determination condition that the fuel gas non-consumption state is considered to have occurred is satisfied. As a result, in the first holding pressure process, while executing the stop process for avoiding leakage determination, that is, at least while trying to generate a fuel gas non-consumed state by not consuming the fuel gas in the power generation unit. Even if the fuel gas is consumed, it is ensured that at least the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is equal to or longer than the above setting determination time.
Therefore, it is possible to provide an energy supply system capable of appropriately bringing about a non-consumption state of fuel gas even if fuel is consumed for heating while the stop processing for avoiding leakage determination is being executed.

Another characteristic configuration of the energy supply system according to the present invention is that the power generation unit includes a reforming processing apparatus that performs a hydrogen gas generation processing for steam reforming a fuel gas to generate hydrogen gas, and the hydrogen gas generation processing. Has a fuel cell that performs power generation operation using hydrogen gas generated by
The operation control unit
When the power generation unit is stopped, the fuel supplied to the pressure-holding target area inside the power generation unit via the microcomputer meter after stopping the hydrogen gas generation process in the reforming processing apparatus. While the first filling process of filling with gas and sealing with the pressure in the pressure-holding target region set to the first set appropriate pressure or higher is executed, and then the stop process for avoiding leakage determination is not executed. When the replenishment start condition is satisfied by reducing the pressure in the pressure holding target region to the first lower limit pressure lower than the first set appropriate pressure, the fuel gas is replenished inside the power generation unit and the pressure holding target The first pressure holding process for making the pressure in the region equal to or higher than the first set appropriate pressure is executed.
When the heat medium heating operation of the heating combustor is performed by the intermittent combustion while the leakage determination avoidance stop process is being executed, the combustion continuation period after the replenishment start condition is satisfied. The point is that the first holding pressure treatment is executed within the period, and the first holding pressure treatment is not executed within the combustion stop period.
According to the above-mentioned characteristic configuration, the operation control unit replenishes the fuel gas inside the power generation unit and executes the first pressure holding process to make the pressure in the pressure holding target region equal to or higher than the first set appropriate pressure. It is possible to prevent oxygen (air) and the like from entering the pressure target area. Therefore, oxidative deterioration of the catalyst in the pressure-holding target region can be suppressed.
In addition, when the operation control unit is performing the heat medium heating operation of the heating combustor by intermittent combustion while executing the stop processing for avoiding leakage determination, the combustion after the replenishment start condition is satisfied. The first holding pressure treatment is executed within the continuation period, and the first holding pressure treatment is not executed within the combustion stop period. That is, when the heat medium heating operation of the heating combustor is performed by intermittent combustion while the stop processing for avoiding leakage judgment is being executed, even if the first compensating treatment is performed and the fuel gas is consumed. It is limited to the duration of combustion in which the fuel gas is burned in the heating combustor. As a result, fuel is used in the heating combustor while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming the fuel gas. Even if the gas is burned and the fuel gas is consumed in the first compression treatment, it is ensured that at least the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted exceeds the above setting determination time. To.

Yet another characteristic configuration of the energy supply system according to the present invention is that the operation control unit performs the first filling process inside the reforming processing device as the pressure holding target region via the microcomputer meter. A process of filling the supplied fuel gas and sealing the internal pressure of the reforming processing apparatus in a state of being equal to or higher than the first set appropriate pressure is executed.
The first pressure holding treatment is to replenish the inside of the reforming treatment apparatus with fuel gas to make the pressure inside the reforming treatment apparatus equal to or higher than the first set appropriate pressure.

According to the above-mentioned feature configuration, the operation control unit executes the first pressure holding process of replenishing the inside of the reforming processing device as the pressure holding target area with fuel gas to make the pressure equal to or higher than the first set appropriate pressure. This makes it possible to prevent oxygen (air) and the like from entering the reforming processing apparatus. Therefore, it is possible to suppress oxidative deterioration of the catalyst inside the reforming treatment apparatus.

Yet another characteristic configuration of the energy supply system according to the present invention is that when the operation control unit stops the power generation unit, after stopping the power generation operation in the fuel cell, the fuel of the fuel cell A second filling process for sealing the fuel electrode region is executed in a state where the polar region is filled with gas supplied via the reforming treatment apparatus and the pressure is equal to or higher than the second set appropriate pressure, and then the fuel When the pressure in the polar region drops to the second lower limit filling pressure less than the second set appropriate pressure, the gas existing inside the reforming treatment apparatus is replenished in the fuel pole region to reduce the pressure in the fuel pole region. The second point is to execute the second pressure holding process to make the pressure equal to or higher than the second set appropriate pressure.

According to the above characteristic configuration, the operation control unit replenishes the inside of the fuel cell with the gas existing inside the reforming treatment apparatus and executes the second holding pressure treatment to make the pressure equal to or higher than the second set appropriate pressure. By doing so, it is possible to prevent oxygen (air) and the like from entering the fuel electrode region of the fuel cell. Therefore, it is possible to suppress oxidative deterioration of the catalyst of the fuel electrode of the fuel cell.

Yet another characteristic configuration of the energy supply system according to the present invention is that the operation control unit is supplied via the microcomputer meter in the energy supply unit while the stop process for avoiding leakage determination is being executed. When the use of fuel gas is stopped
When the combustion start timing of the fuel gas in the combustion continuation period in the heat medium heating operation of the heating combustor comes, the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. The point is that the combustion of the fuel gas in the combustion continuation period in the heat medium heating operation of the heating combustor is started after the elapsed time from the time becomes equal to or longer than the setting determination time.

According to the above characteristic configuration, after the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped, the fuel gas is then used for the heat medium heating operation of the heating combustor. The interval until is longer than the above setting determination time. That is, after the use of the fuel gas in the energy supply unit is stopped, the fuel gas is not burned (intermittent combustion) during the combustion continuation period in the heat medium heating operation of the heating combustor. There may be a time when the judgment condition that the consumption state is considered to have occurred is satisfied. As a result, fuel is used in the heating combustor while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a non-consumed fuel gas state by not consuming the fuel gas. Even if the gas is burned, it is ensured that at least the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is equal to or longer than the above setting determination time.

Yet another characteristic configuration of the energy supply system according to the present invention is that the energy supply unit heats the antifreeze target by the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter. Has a combustor for
The operation control unit
If the anti-freezing start condition is satisfied while the stop process for avoiding leakage determination is not executed, the anti-freezing operation process for combusting and operating the anti-freezing combustor is executed.
When the freeze prevention start condition is satisfied while the leakage determination avoidance stop process is being executed, the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. After the elapsed time from the stop is equal to or longer than the set determination time, the antifreezing combustor is combusted to start the antifreezing operation process.

According to the above-mentioned characteristic configuration, the interval from the stop of the use of the fuel gas supplied via the microcomputer meter in the energy supply unit to the next combustion operation of the fuel gas in the antifreeze combustor is as described above. It will be more than the setting judgment time. That is, there may be a period during which the determination condition that the fuel gas non-consumption state is considered to have occurred is satisfied. As a result, the antifreeze combustor is used while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit is trying to generate a fuel gas non-consumption state by not consuming the fuel gas. Even if the fuel gas is burned, it is ensured that at least the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is equal to or longer than the above setting determination time.

Another characteristic configuration of the energy supply system according to the present invention is that the power generation unit includes a reforming processing apparatus that performs a hydrogen gas generation processing for steam reforming a fuel gas to generate hydrogen gas, and the hydrogen gas generation processing. Has a fuel cell that performs power generation operation using hydrogen gas generated by
The operation control unit
When the power generation unit is stopped, the fuel supplied to the pressure-holding target area inside the power generation unit via the microcomputer meter after stopping the hydrogen gas generation process in the reforming processing apparatus. A first filling process is executed in which gas is filled and the pressure in the pressure-holding target region is set to be equal to or higher than the first set appropriate pressure, and then the pressure in the pressure-holding target region is set to the first set appropriate. When the replenishment start condition is satisfied by lowering to the first lower limit pressure less than the pressure, the fuel gas is replenished inside the power generation unit to make the pressure in the pressure holding target region equal to or higher than the first set appropriate pressure. 1 Execute pressure holding process,
When the replenishment start condition is satisfied while the leakage determination avoidance stop process is being executed, when the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. The point is that the fuel gas is replenished inside the power generation unit and the first pressure holding process is started after the elapsed time from the stop is equal to or longer than the set determination time.

According to the above characteristic configuration, the interval between the stop of the use of the fuel gas supplied via the microcomputer meter in the energy supply unit and the next use of the fuel gas for the first holding pressure treatment is It exceeds the above setting judgment time. That is, there may be a period during which the determination condition that the fuel gas non-consumption state is considered to have occurred is satisfied. As a result, in the first holding pressure process, while executing the stop process for avoiding leakage determination, that is, at least while trying to generate a fuel gas non-consumed state by not consuming the fuel gas in the power generation unit. Even if the fuel gas is consumed, it is ensured that at least the period during which the consumption of the fuel gas supplied via the microcomputer meter is interrupted is equal to or longer than the above setting determination time.

Schematic configuration of the energy supply system Block diagram showing the configuration of the reforming processing equipment Block diagram showing the configuration of the heat source unit The figure explaining the continuous combustion of a combustion combustor for heating The figure explaining the intermittent combustion of the combustor for heating Flowchart showing leakage judgment avoidance processing The figure explaining the execution timing of the heating operation process and the antifreeze operation process. The figure explaining the execution timing of the heating operation process and the antifreeze operation process. The figure explaining the execution timing of the heating operation process and the holding pressure process. The figure explaining the execution timing of the heating operation process and the holding pressure process. The figure explaining the execution timing of the heating operation process The figure explaining the execution timing of the antifreeze operation process The figure explaining the execution timing of the holding pressure processing The figure explaining the execution timing of the pressure holding process, the heating operation process, and the antifreeze operation process.

[First Embodiment]
Hereinafter, the energy supply system according to the present invention will be described with reference to the drawings.
(Overall configuration of energy supply unit H)
As shown in FIG. 1, the energy supply system includes an energy supply unit H including a microcomputer meter M, a power generation unit Ha that generates power using a fuel gas G supplied via the microcomputer meter M, and an energy supply unit H. It is provided with an operation control unit C that controls the operation of the above. For example, as the energy supply unit H, a power generation unit Ha that generates electricity using a fuel gas G supplied via an ultrasonic microcomputer meter M and a heat and power cogeneration unit including a heat source unit Hb are provided, and the heat source unit Hb is provided. Is provided with a hot water storage tank 1 for storing hot water for recovering the exhaust heat of the power generation unit Ha, and an auxiliary heat source machine 2 for burning using the fuel gas G supplied via the microcomputer meter M.

The auxiliary heat source machine 2 functions as a combustion combustor J for heating, a combustor K for hot water supply, and a combustor N for preventing freezing of the heat source portion Hb, the details of which will be described later.
The fuel gas G supplied via the microcomputer meter M will be supplied to various gas consuming devices such as a gas stove, but in the present embodiment, the description of the gas consuming device will be omitted.

In the microcomputer meter M, a fuel gas non-consumption state that satisfies a predetermined determination condition including a state in which the flow rate of the fuel gas G is equal to or less than the set determination amount continues for the set determination time or more does not occur during the leakage determination period. Occasionally, it has a function of activating an alarm or shutting off the supply of fuel gas G. For example, in the case of an ultrasonic microcomputer meter M, a determination condition (that is, a flow rate of the fuel gas G) for being regarded as a non-consumed state of fuel gas during the leakage determination period (for example, 30 days) of the microcomputer meter M When the setting judgment amount (for example, 1.0 L / h) or less is the setting judgment time or more (for example, 2 minutes or more), the integrated value of the duration is the set value or more (for example, 60 minutes). If the condition) is not satisfied, the microcomputer meter M activates an alarm or cuts off the supply of the fuel gas G. By the way, the fuel gas G is a gas containing hydrocarbons such as city gas and propane gas.

The power generation unit Ha performs a reforming processing device 3 that performs a hydrogen gas generation process that steam reforms the fuel gas G to generate hydrogen gas, and a power generation operation using the hydrogen gas generated by the hydrogen gas generation process. It has a solid polymer type fuel cell 4.
The fuel cell 4 is configured by stacking cells having a fuel electrode 4n and an oxygen electrode 4s, and further includes a flow section 4d through which cooling water for cooling the cell passes.

The cooling water circulation path 5A that recovers the heat generated by the fuel cell 4 with the cooling water, the hot water circulation path 5B that circulates the hot water of the hot water storage tank 1, and the cooling water and the hot water circulation path 5B that circulates the cooling water circulation path 5A are circulated. A heat exchange unit 5C for heat exchange with hot water is provided.
The cooling water circulation path 5A is provided with a cooling water circulation pump Pa and a cooling water storage tank Q, and the hot water circulation path 5B is provided with a hot water circulation pump Pb.

Then, in the heat exchange unit 5C, the hot water flowing through the hot water circulation path 5B is heated by the cooling water circulating in the cooling water circulation path 5A, so that the hot water is stored in the hot water storage tank 1 and the stored hot water is used. It is configured to supply hot water, heat, and reheat the bath water, and when the amount of heat stored in the hot water storage tank 1 is insufficient, the auxiliary heat source machine 2 is configured to operate. Will be described later.

An inverter 6 for grid interconnection is provided on the power output side of the fuel cell 4, and the inverter 6 has the same voltage and frequency as the received power that receives the generated power of the fuel cell 4 from the commercial power source 7. It is configured to.
The commercial power source 7 is, for example, a single-phase three-wire system 100 / 200V, and is electrically connected to a power load 9 of a television, a refrigerator, a washing machine, or the like via a power receiving power supply line 8.
The inverter 6 is electrically connected to the received power supply line 8 via the generated power supply line 10, and the generated power from the fuel cell 4 is supplied to the power load 9 via the inverter 6 and the generated power supply line 10. It is configured as follows.

The received power supply line 8 is provided with a received power measuring unit 11 for measuring the received power from the commercial power source 7. The received power measuring unit 11 can also detect whether or not a so-called reverse power flow, in which a current flows to the commercial power source 7 side in the received power supply line 8, occurs.
Then, the power supplied from the fuel cell 4 to the received power supply line 8 is controlled by the inverter 6 so that the reverse power flow does not occur, and the surplus power of the generated power by the fuel cell 4 uses the surplus power as heat. It is configured to be supplied to the electric heater 12 which is replaced and collected.

The electric heater 12 is composed of a plurality of electric heater portions, and the electric heater 12 is provided to heat the hot water flowing through the hot water circulation path 5B described above.
The plurality of electric heater portions of the electric heater 12 are switched on / off by the switch circuit 13. The switch circuit 13 is configured to adjust the power consumption of the electric heater 12 according to the size of the surplus power so that the power consumption of the electric heater 12 increases as the size of the surplus power increases.

The power generation unit Ha is provided with a power generation control unit Ca that controls the operation of the reforming processing device 3 and the fuel cell 4, and the heat source unit Hb is provided with a heat source control unit Cb that controls the operation of the heat source unit Hb. The operation control unit C that controls the operation of the energy supply unit H is composed of a power generation control unit Ca and a heat source control unit Cb.
The power generation control unit Ca and the heat source control unit Cb are configured to freely communicate various types of information, and the power generation control unit Ca and the heat source control unit Cb are given an operation start command, an operation stop command, etc. A remote controller R for instructing various kinds of information is provided.

(Reform processing device 3)
Next, the reforming processing apparatus 3 will be described.
As shown in FIG. 2, a fuel supply path 16 for pumping the fuel gas G supplied via the microcomputer meter M by the fuel pump 15 is provided, and the fuel gas G supplied through the fuel supply path 16 is provided. On the other hand, a desulfurizer 17 that acts as a desulfurizer is provided.
A steam generator 18 that vaporizes the supplied water to generate steam is provided, and the desulfurized fuel gas from the desulfurizer 17 is reformed with steam from the steam generator 18 to generate hydrogen-containing gas. A pawn 19 is provided.

Further, the reformer 20 for transforming carbon monoxide contained in the reformed gas reformed by the reformer 19 into carbon dioxide, and the entire amount of the reformed gas transformed by the reformer 20 are supplied. A gas cooler 21 that cools the water vapor in the supplied metamorphic gas to condense it, and a gas-water separator 22 that separates the condensed water in which the steam in the reformed gas is condensed by cooling by the gas cooler 21. Is provided.

A part of the metamorphic gas from which the condensed water is separated by the gas-water separator 22 is supplied to the carbon monoxide selective oxidizer 23, and the carbon monoxide contained in the supplied metamorphic gas is selectively oxidized. The hydrogen-containing gas from the carbon monoxide selective oxidizer 23 is configured to be supplied as fuel gas for power generation to the fuel electrode 4n of the fuel cell 4 through the fuel cell supply path 24.
Further, the balance of the metamorphic gas from which the condensed water is separated by the brackish water separator 22 is mixed and supplied to the fuel gas G of the fuel supply path 16 through the desulfurization recycling path 25 as a hydrogen-containing gas for desulfurization treatment. It is configured.

Incidentally, the gas cooler 21 and the brackish water separator 22 separate the water vapor in the transformed gas that has been transformed by the transformer 20 as described above during normal operation, and will be described later. In the gas purge treatment, the water vapor remaining inside the reforming treatment apparatus 3 is separated.

As described above, the reforming apparatus 3 steam reformed the fuel gas G supplied through the fuel supply path 16 in the reformer 19 to generate hydrogen-containing gas, which was generated in the reformer 19. The hydrogen-containing gas is passed through the reformer 20 and the carbon monoxide selective oxidizer 23 in this order to reduce the carbon monoxide concentration contained in the hydrogen-containing gas, and generate a hydrogen-containing gas having a low carbon monoxide concentration. The fuel gas for fuel is configured to be supplied to the fuel cell 4 through the fuel cell supply path 24.

(Details of reforming treatment device 3)
Hereinafter, each part of the reforming processing apparatus 3 will be described.
As is clear from the above description, the fuel gas G supplied through the fuel supply path 16 is a desulfurizer 17, a reformer 19, a metamorphic device 20, a gas cooler 21, a gas-water separator 22, and carbon monoxide selective oxidation. Since the gas flows through the vessel 23, the desulfurizer 17, the reformer 19, the metabolizer 20, the gas cooler 21, the gas-water separator 22, and the carbon monoxide selective oxidizer 23 are arranged in the order described in the gas treatment flow path 27. It is connected by.

Of the hydrogen-containing gas supplied to the fuel electrode 4n of the fuel cell 4 through the fuel cell supply path 24, the remaining gas that is not used for power generation is exhaust fuel gas (hereinafter abbreviated as off gas) from the fuel electrode 4n of the fuel cell 4. The off-gas passage 26 is provided to supply the off-gas as combustion gas to the reformer burner 19a of the reformer 19.
That is, the off-gas discharged from the fuel cell 4 after the power generation reaction is burned by the reformer burner 19a with the combustion air from the combustion air passage 29, and the reforming catalyst can be reformed. It is configured to heat up.

The steam passage 28 for guiding steam from the steam generator 18 is connected to the gas treatment flow path 27 connecting the desulfurizer 17 and the reformer 19, and the fuel gas G desulfurized by the desulfurizer 17 and steam generation. It is configured to supply the steam generated in the vessel 18 to the reformer 19.

The fuel supply path 16 is provided with a fuel valve V1 for interrupting the supply of the fuel gas G, the fuel cell supply path 24 is provided with a generated gas outlet valve V2, and the off-gas path 26 is provided with a reformer burner. A battery outlet valve V6 for interrupting the supply of off-gas to 19a is provided, and a combustion air valve V10 for interrupting the supply of combustion air to the reformer burner 19a is provided in the combustion air passage 29. ..

Although not shown, a fuel supply path for supplying the fuel gas G supplied via the microcomputer meter M to the reformer burner 19a at the time of starting or the like is provided, and fuel is provided in the fuel supply path. It is equipped with an intermittent valve that interrupts the supply of fuel.

The battery bypass path 30 is branched from a location upstream of the generated gas outlet valve V2 in the fuel cell supply path 24, and the battery bypass path 30 is located downstream of the battery outlet valve V6 in the off-gas path 26. It is connected. Further, the battery bypass path 30 is provided with a battery bypass valve V7 that opens and closes the flow path.

In the steam generator 18, heat exchange is possible between the combustion gas flow section 18a through which the combustion exhaust gas discharged from the reformer burner 19a flows and the evaporation section 18b in which water is supplied through the reforming water supply path 31. It is configured to vaporize water by using the combustion exhaust gas discharged from the reformer burner 19a of the reformer 19 as a heat source to generate steam.

The reformed water supply path 31 is provided with a reformed water valve V3 that interrupts the supply of water.
Further, the steam generator 18 is provided with a reformed water discharge path 32 for discharging internal water, and the reformed water discharge path 32 is provided with a reformed water discharge valve V4 for opening and closing the flow path. ing.

The desulfurization recycling path 25 is provided in a form of connecting the gas phase portion of the steam separator 22 and the fuel supply path 16, and the desulfurization recycling path 25 is provided with a desulfurization recycling valve V8 that opens and closes the flow path. ing.
An air passage 33 for selective oxidation that supplies air for selective oxidation to the carbon monoxide selective oxidizer 23 is provided, and the air passage 33 for selective oxidation is provided with an air valve V9 for selective oxidation that opens and closes the flow path. ing.

The reformer 19 is provided with a reformer temperature sensor 34 so as to detect the temperature of the portion where the temperature is highest in the reforming reaction region inside the reformer 19, and a flow path is provided in the fuel cell supply path 24. A reformer-side pressure sensor 35 that detects the pressure inside the reformer 3 as the pressure inside the reformer 3 is provided.

By the way, the fuel supply path 16, the gas treatment channel 27, the steam path 28, the reformed water supply path 31, the reformed water discharge path 32, the desulfurizer 17, the steam generator 18, the reformer 19, the modifier 20, one. The gas treatment path formed by the carbon oxide selective oxidizer 23, the fuel cell supply path 24, etc., that is, the carbon monoxide selective oxidation from the desulfurization device 17 and the steam generator 18 via the reformer 19 and the transformer 20. Since the reformer 19 has the highest temperature in the gas treatment path leading to the vessel 23, the reformer temperature sensor 34 detects the temperature of the highest temperature portion in the gas treatment path.

Further, the off-gas passage 26 is provided with a fuel cell side pressure sensor 36 that detects the pressure in the flow path as the pressure in the gas passage with respect to the fuel electrode 4n of the fuel cell 4. That is, as described later, when the fuel gas G is filled in the region including the fuel electrode 4n of the fuel cell 4 (“fuel electrode region” of the present invention), the pressure in that region is measured by the fuel cell side pressure sensor 36. It is configured to detect.

The detection information of the reformer temperature sensor 34, the reformer side pressure sensor 35, and the fuel cell side pressure sensor 36 is input to the power generation control unit Ca, and the power generation control unit Ca activates the reformer processing device 3. It is configured to perform operation, steady operation (normal operation), stop storage operation, and the like.

(Stop storage operation of power generation unit)
Next, a stop storage operation when the operations of the reforming processing apparatus 3 and the fuel cell 4 are stopped and stored will be described.
When the power generation control unit Ca stops and stores the reforming processing device 3 and the fuel cell 4 by stopping the operation, the steam generator is in a state where the supply of the fuel gas G through the fuel supply path 16 is stopped. By continuing the generation of water vapor by 18, the water vapor is supplied to the inside of the reforming processing device 3 and the fuel cell 4, and the gas existing inside the reforming processing device 3 and the fuel electrode 4n of the fuel cell 4 is discharged. A steam supply treatment (hereinafter referred to as a steam purge treatment) is performed, then the supply of water to the water vapor generator 18 is stopped, water is discharged from the inside of the water vapor generator 18, and a reforming treatment is performed. A filling process (hereinafter referred to as a gas purge process) is performed in which the fuel gas G supplied via the microcomputer meter M is filled and sealed as a purge gas inside the device 3 and the fuel electrode 4n of the fuel cell 4. It is configured as follows.

Further, the power generation control unit Ca keeps the gas pressure inside the reforming treatment device 3 at or higher than the first set appropriate pressure on the reforming processing device 3 side after the gas purging process, and the fuel electrode 4n of the fuel cell 4 It is configured to perform the holding pressure treatment (first holding pressure treatment and second holding pressure treatment) for keeping the gas pressure in the region including the fuel cell side at or higher than the second set appropriate pressure. In the present embodiment, the replenishment start condition is the first lower limit pressure (for example, 0.5 kpa) in which the detection pressure of the pressure sensor 35 on the reforming processing apparatus side is set to be less than the first set appropriate pressure (for example, 1.0 kpa). The conditions are as follows, and the replenishment stop condition is a condition in which the detected pressure becomes equal to or higher than the first set appropriate pressure.
Incidentally, in the present embodiment, the replenishment of gas to the fuel cell 4 (second holding pressure treatment) is performed in the form of supplying the gas filled inside the reforming treatment device 3 to the fuel cell 4 as described later. It is configured as follows.

Hereinafter, the stop storage operation will be described.
That is, during the steady operation (normal operation) of the reforming processing apparatus 3 and the fuel cell 4, the fuel valve V1, the generated gas outlet valve V2, the reforming water valve V3, the battery outlet valve V6, the desulfurization recycling valve V8, and the selective oxidation The air valve V9 for combustion and the air valve V10 for combustion are in the open state, and the reforming water discharge valve V4 and the battery bypass valve V7 are in the closed state.

As will be described later, when the stop condition is satisfied, such as when 26 days, which corresponds to 4 days before the leakage determination period (for example, 30 days) of the microcomputer meter M, have elapsed, the power generation control unit Ca will generate steam. Start the purge process. That is, the fuel valve V1, the desulfurization recycling valve V8, and the selective oxidation air valve V9 are closed, and the battery bypass valve V7 is opened to start the steam purging process (steam supply process). Therefore, the hydrogen gas generation process in the reforming processing apparatus 3 is stopped, and the power generation operation in the fuel cell 4 (that is, the power output from the inverter 6 to the generated power supply line 10) is stopped.

After that, when the detection temperature of the reformer temperature sensor 34 becomes equal to or lower than the gas purge start temperature that can prevent the condensation of water vapor and the precipitation of carbon due to the thermal decomposition of the fuel gas G, the reformer water valve V3 is closed. The gas purge process is started by opening the reformed water discharge valve V4, opening the fuel valve V1 and closing the combustion air valve V10.

After that, when the set time elapses, the reforming water discharge valve V4 is closed to finish discharging water from the water vapor generator 18, and then the detection pressure of the fuel cell side pressure sensor 36 is the second pressure on the fuel cell side. When the set proper pressure or more is reached, the generated gas outlet valve V2 and the battery outlet valve V6 are closed, and when the detection pressure of the pressure sensor 35 on the reformer processing device side becomes equal to or higher than the first set proper pressure on the reformer side, the fuel valve V1 is closed. The gas purge process is completed by closing. That is, the reforming processing apparatus 3 and the fuel cell 4 are put into a sealed state filled with the fuel gas G.

Even if the reforming treatment device 3 and the fuel cell 4 are sealed by the gas purge treatment, the gas pressure in the reforming treatment device 3 and the fuel cell 4 decreases as the temperature drops thereafter.
Therefore, the reforming processing apparatus 3 is subsequently subjected to the first holding pressure treatment.
That is, when the detection pressure of the pressure sensor 35 on the reformer processing device side becomes less than the first set appropriate pressure on the reformer side and equal to or less than the first lower limit pressure on the reformer side, the fuel valve V1 is opened and the reformer side side. When the pressure exceeds the first lower limit pressure, the fuel valve V1 is closed. The details of this first holding pressure treatment will be described later.

In this way, when the operation control unit C stops the power generation unit Ha, after stopping the hydrogen gas generation process in the reforming processing device 3, the operation control unit C has a microcomputer meter in the pressure holding target area inside the power generation unit Ha. A first filling process is executed in which the fuel gas G supplied via M is filled and the pressure in the pressure-retaining target area is equal to or higher than the first set appropriate pressure, and then the pressure-retaining target area is sealed. When the replenishment start condition is satisfied by lowering the pressure at the first lower limit pressure to less than the first set appropriate pressure, the fuel gas G is replenished inside the power generation unit Ha and the pressure in the pressure holding area is set to the first. The first pressure holding process for increasing the set appropriate pressure or higher is executed. In particular, when the pressure-holding target area is inside the reforming processing device 3, the operation control unit C passes through the microcomputer meter M inside the reforming processing device 3 as the pressure-retaining target area as the first filling process. The fuel gas G to be supplied is filled and sealed in a state where the pressure inside the reforming treatment apparatus 3 is equal to or higher than the first set appropriate pressure, and the reforming treatment is performed as the first holding pressure treatment. A process of replenishing the fuel gas G inside the device 3 to make the pressure inside the reforming device 3 equal to or higher than the first set appropriate pressure is executed.

Further, the fuel cell 4 is subjected to the second pressure holding process of supplying the gas filled in the reforming treatment device 3 to the region (fuel electrode region) including the fuel electrode 4n of the fuel cell 4. Become. That is, when the detected pressure of the fuel cell side pressure sensor 36 becomes equal to or less than the second lower limit pressure on the fuel cell side, which is less than the second set appropriate pressure on the fuel cell side, the generated gas outlet valve V2 is opened and the second setting on the fuel cell side is performed. When the pressure exceeds the appropriate level, the generated gas outlet valve V2 is closed. That is, when the pressure of the gas in the fuel electrode region of the fuel cell 4 becomes low, the gas filled in the reforming processing apparatus 3 is supplied to the fuel cell 4. For example, the second set appropriate pressure is a pressure equal to or less than the first set appropriate pressure, and the second lower limit pressure is a pressure equal to or less than the first lower limit pressure.

As described above, when the operation control unit C stops the power generation unit Ha, after stopping the power generation operation in the fuel cell 4, the operation control unit C passes through the reforming processing device 3 to the fuel electrode region of the fuel cell 4. A second filling process for sealing the fuel electrode region is executed in a state where the supplied gas is filled and the pressure is equal to or higher than the second set appropriate pressure, and then the pressure in the fuel electrode region is less than the second set appropriate pressure. 2 When the filling pressure drops to the lower limit filling pressure, the gas existing inside the reforming treatment apparatus 3 is replenished to the fuel electrode region, and the second holding pressure treatment for making the pressure in the fuel electrode region equal to or higher than the second set appropriate pressure is executed.

(Structure of heat source part)
As shown in FIG. 3, in addition to the hot water storage tank 1 and the auxiliary heat source machine 2 described above, the heat source unit Hb includes a multifunctional circulation pump 40, a heating circulation pump 41, a bath reheating circulation pump 42, and heating heat. A exchanger 43 and a heat exchanger 44 for reheating the bath are provided.
Further, the heat source portion Hb is provided with a hot water supply mixing valve 45, a heating solenoid valve 46, a bath reheating solenoid valve 47, a three-way valve 48, a tank proportional valve 49, and a heat storage switching valve 50.

A hot water outlet 51 is provided at the top of the hot water storage tank 1, a hot water supply path 52 is provided at the bottom of the hot water storage tank 1, and the hot water outlet 51 is connected to a hot water mixing valve 45 to mix hot water. A hot water supply passage 58 capable of supplying hot water to a hot water supply destination such as a curan extends from the valve 45. Further, the hot water supply passage 58 on the downstream side of the hot water supply mixing valve 45 is connected to the bath circulation passage 57 via the hot water supply passage 62. Then, the heat source control unit Cb opens the hot water filling valve 63 provided in the middle of the hot water filling path 62, so that the bathtub connected to the bath circulation path 57 is filled with hot water.
A water supply channel 53 for supplying hot water from a water supply source such as tap water is connected to a first water supply channel 53a connected to a hot water supply mixing valve 45 and a second heat storage switching valve 50 provided in the hot water supply channel 52. It is branched into a water supply channel 53b.

A multifunctional circulation path 54 in which the multifunctional circulation pump 40 is arranged is provided via an auxiliary heat source machine 2, a heat exchanger 43 for heating, a heat exchanger 44 for bath reheating, and a three-way valve 48. A branch path 51a branched from the hot water take-out path 51 is connected to the three-way valve 48, and the hot water supply path 52 is connected to the multifunction circulation path 54.
The heat exchanger 43 for heating and the heat exchanger 44 for bath reheating are arranged in parallel with the multifunctional circulation path 54, and the heating electromagnetic valve 46 allows hot water to flow through the heating heat exchanger 43. The bath reheating electromagnetic valve 47 is arranged in the multifunctional circulation path 54 in a form of interrupting the flow of hot water through the bath reheating heat exchanger 44.

A joint flow path 55 connecting the downstream side of the auxiliary heat source machine 2 in the multifunctional circulation path 54 and the hot water outlet path 51 is provided, and a tank proportional valve 49 is provided in the joint flow path 55.
The heating circulation path 56 is provided via the heating heat exchanger 43, and the heating circulation pump 41 is provided in the heating circulation path 56.
The bath circulation path 57 is provided via the bath reheating heat exchanger 44, and the bath reheating circulation pump 42 is provided in the bath circulation path 57.

Then, the heat source unit Hb heats the heating device L through the hot water supply operation process and the heating circulation path 56 in which the hot water from the hot water outlet 51 and the hot water from the first water supply channel 53a are mixed and supplied from the hot water supply path 58. It is configured to perform a heating operation process for supplying a medium and a bath reheating operation process for heating while circulating bathtub water through a bath circulation path 57. As described above, the auxiliary heat source machine 2 as the heating combustor J is a heating target by utilizing the combustion heat obtained by burning the fuel gas G supplied via the microcomputer meter M in the heating operation process. It is used to perform a heat medium heating operation that heats a heating heat medium for heating a space. The heating device L is, for example, an air conditioner such as a panel radiator for heating the air in the heating target space, a floor heating device installed on the floor of the heating target space, and the like, all of which are generated by heat dissipation from the heating heat medium. It is a device that warms the space subject to air conditioning.

Each of the hot water supply operation process, the heating operation process, and the bath reheating operation process is performed using the hot water of the hot water storage tank 1, but when the hot water storage heat amount of the hot water storage tank 1 is insufficient, the auxiliary heat source machine 2 is used. It is configured to be burned.
For example, when the hot water supply operation is performed and the amount of hot water stored in the hot water storage tank 1 is large, the hot water in the hot water storage tank 1 is supplied to the hot water supply mixing valve 45 through the hot water outlet path 51. In this case, the hot water from the second water supply passage 53b is supplied to the hot water storage tank 1 through the hot water supply passage 52 while passing through the heat storage switching valve 50.

When the hot water supply operation process is performed and the amount of hot water stored in the hot water storage tank 1 is small, hot water from the second water supply channel 53b is supplied to the multifunctional circulation path 54 through the hot water supply path 52 via the heat storage switching valve 50. After heating with the auxiliary heat source machine 2, the hot water is flowed to the hot water outlet 51 through the joint flow path 55.

When the amount of hot water stored in the hot water storage tank 1 is large when performing the heating operation process or the bath reheating operation process, the hot water in the hot water storage tank 1 is circulated in a multifunctional manner through the branch path 51a with the multifunctional circulation pump 40 operated. After supplying to the road 54 and flowing the heating heat exchanger 43 and the bath reheating heat exchanger 44, the heat exchanger 44 is returned to the hot water storage tank 1 through the hot water supply passage 52.

When the amount of heat stored in the hot water storage tank 1 is small during the heating operation process or the bath reheating operation process, the multifunction circulation pump 40 is operated with the three-way valve 48 switched so as to close the branch path 51a. The hot water in the multifunctional circulation path 54 is circulated, and the circulated hot water is heated by the auxiliary heat source machine 2.

Combustion modes when the fuel gas G is burned by the auxiliary heat source machine 2 as the heating combustor J include continuous combustion and intermittent combustion. FIG. 4 is a diagram for explaining continuous combustion, and FIG. 5 is a diagram for explaining intermittent combustion. As shown in the figure, continuous combustion is a combustion operation in which, when the heating start condition in the heating device L is satisfied, the fuel gas G is continuously burned until the heating stop condition is satisfied. Intermittent combustion is a combustion operation in which a continuous combustion period in which the fuel gas G is continuously burned and a combustion stop period in which the combustion of the fuel gas G is stopped are alternately repeated.

Specifically, the heat source control unit Cb determines that the heating start condition is satisfied when the remote controller R commands the start of operation of the heating device L, and when the remote controller R commands the operation of the heating device L to stop. It is determined that the heating stop condition is satisfied. Then, when the heating start condition is satisfied, the heat source control unit Cb measures the heating by the heat medium temperature sensor S3 provided on the downstream side of the heating heat exchanger 43 in the middle of the heating circulation path 56. The amount of fuel gas to be burned by the heating combustor J (auxiliary heat source machine 2) is adjusted according to the temperature of the heat medium.

In both continuous combustion and intermittent combustion, if the amount of fuel gas to be burned is increased to generate a relatively large amount of combustion heat, it is transferred to the heating heat medium flowing through the heating circulation path 56 during that time. The amount of heat generated increases, and the temperature of the heating medium becomes relatively high. Further, if the amount of combustion fuel gas is reduced to generate a relatively small amount of combustion heat, the amount of heat transferred to the heating heat medium flowing through the heating circulation path 56 during that period is reduced, and the heating heat medium is reduced. The temperature of is relatively low. For example, the heat source control unit Cb can increase or decrease the amount of fuel gas burned by the heating combustor J so that the temperature of the heating heat medium measured by the heat medium temperature sensor S3 becomes the target temperature. In the case of intermittent combustion, the temperature of the heating heat medium is adjusted by changing the length of at least one of the combustion continuation period and the combustion stop period, instead of changing the amount of fuel gas to be burned. You can also do it.

(About hot water supply operation processing)
In the hot water supply operation process, as described above, when the hot water supply start condition is satisfied and the amount of hot water stored in the hot water storage tank 1 is small, the auxiliary heat source machine 2 functioning as the hot water supply combustor K is operated until the hot water supply stop end condition is satisfied. It will be burned.

As for the hot water supply start condition, for example, the water flow sensor W that detects the flow of hot water through the hot water supply passage 58 by opening the hot water supply tap (not shown) provided at the tip of the hot water supply passage 58 detects the flow of hot water. Or, the remote controller R has given a command to fill the bath with hot water.
On the other hand, the condition for ending the hot water supply stop is that the water flow sensor W no longer detects the flow of hot water due to the closing of the hot water tap. Alternatively, the heat source control unit Cb has determined that the bath water filling has been completed.

That is, when the heat source control unit Cb detects the flow of hot water by the water flow sensor W, the hot water mixing valve 45, the auxiliary heat source machine 2, etc. are used to supply hot water at the target temperature through the hot water supply passage 58. A hot water mixing valve 45 to control the operation and to supply hot water of a target temperature to the bathtub through the hot water supply passage 58, the hot water filling passage 62, and the bath circulation passage 57 at the start timing of the bath hot water filling. It is configured to control the operation of the water heater valve 63, the auxiliary heat source machine 2, and the like.

(Leakage judgment avoidance processing)
The power generation control unit Ca stops the operation of the power generation unit Ha until the start prohibition release condition is satisfied before the period during which the fuel gas non-consumption state does not occur reaches the leakage determination period (for example, 30 days). Execute stop processing for avoiding leakage judgment. For example, the power generation control unit Ca stops the operation of the power generation unit Ha until the start prohibition release condition is satisfied after 26 days, which corresponds to 4 days before the leakage determination period of the microcomputer meter M, has elapsed. It is configured to execute a warning process for displaying a stop process and a message prompting the user to refrain from consuming the fuel gas G on the remote controller R until the start prohibition release condition is satisfied, as a leak determination avoidance process.

In the present embodiment, the start prohibition release condition is that the duration for continuing the state in which the flow rate of the fuel gas G is equal to or less than the set determination amount (for example, 1.0 L / h) is equal to or longer than the set determination time (for example, 2 minutes). The above) is defined as a condition in which the integrated value of the duration is equal to or greater than the set value (for example, 60 minutes).

In the present embodiment, the power generation unit Ha is configured to include a reforming device 3 for generating hydrogen gas by steam reforming the fuel gas G, and a fuel cell 4 to which the generated hydrogen gas is supplied. Therefore, the power generation control unit Ca performs the above-mentioned stop storage operation process on the reforming processing device 3 and the fuel cell 4 as a stop process for avoiding leakage determination.

That is, in a state where the supply of the fuel gas G is stopped, the steam purging process (steam supply process) in which steam is supplied to the fuel electrode 4n of the reforming processing device 3 and the fuel cell 4 to discharge the internal gas, and the steam With the supply stopped, the gas purge process (filling process) is sequentially executed to fill and seal the fuel gas G supplied via the microcomputer meter M to the fuel poles 4n of the reforming processing device 3 and the fuel cell 4. After that, the first holding pressure treatment for keeping the internal pressure of the reforming treatment apparatus 3 at an appropriate pressure and the second holding pressure treatment for keeping the internal pressure at the fuel electrode 4n of the fuel cell 4 at an appropriate pressure are executed. ..

In the present embodiment, as shown in FIG. 1, a power generation side flow meter 59a and a heat source side flow meter 59b for measuring the flow rate of the fuel gas G are provided in each of the power generation unit Ha and the heat source unit Hb.
Then, the power generation control unit Ca determines that the flow rate of the fuel gas G to each of the power generation unit Ha and the heat source unit Hb is the set determination amount (for example, based on the detection information of the power generation side flow meter 59a and the heat source side flow meter 59b). , 1.0 L / h) or less is configured to determine the state.

By the way, in the present embodiment, as described above, the power generation side flow meter 59a and the heat source side flow meter 59b are provided. For example, for the power generation unit Ha, whether or not the fuel valve V1 is operated in the open state is determined. It is possible to determine the state in which the flow rate of the fuel gas G is equal to or less than the set determination amount (for example, 1.0 L / h) depending on whether or not the antifreeze heating burner 60 described later is burned, and the heat source unit Hb With respect to the above, since it is possible to determine the state in which the flow rate of the fuel gas G is equal to or less than the set determination amount (for example, 1.0 L / h) depending on whether or not the auxiliary heat source machine 2 is operated, the power generation side flow meter In a form in which the 59a and the heat source side flow meter 59b are not installed, the time during which the fuel gas G is not supplied to each of the power generation unit Ha and the heat source unit Hb may be determined.

The warning processing is supplied to the energy supply unit H even if the scheduled processing time (for example, 12 hours) has elapsed since the timing of the warning processing period was started during the execution of the stop processing for avoiding leakage determination. Cumulative value of the duration when the duration of the continuation of the state in which the flow rate of the fuel gas G is equal to or less than the set determination amount (for example, 1.0 L / h) is equal to or longer than the set determination time (for example, 2 minutes or more) When does not exceed the set value (for example, 60 minutes), a warning is given to stop the consumption of the fuel gas G.

The term "during execution of stop processing for avoiding leakage determination" may be after the time when the power generation control unit Ca decides to stop the operation of the power generation unit Ha, or the power generation control unit Ca actually It may be after the time when the process of stopping the operation of the power generation unit Ha is started, or further, it may be after the time when the operation of the power generation unit Ha is actually stopped.
Then, the operation control unit C decides to stop the operation of the power generation unit Ha at the timing when the power generation control unit Ca decides to stop the operation of the power generation unit Ha, or the power generation control unit Ca actually actually generates the power generation unit Ha. It starts from the timing when the process of stopping the operation of the power generation unit Ha or the timing when the operation of the power generation unit Ha is actually stopped.

(Details of leakage judgment avoidance processing)
Next, the leakage determination avoidance process executed by the power generation control unit Ca will be described with reference to the flowchart of FIG.
First, it is determined whether or not 26 days, which corresponds to 4 days before the leakage determination period (for example, 30 days) of the microcomputer meter M, has passed (# 1), and if 26 days or more have passed, it is determined. , It is determined whether or not the power generation unit Ha has been stopped (# 2). If it is determined in # 1 that 26 days or more have not passed, the process proceeds to another process.

When it is determined in # 2 that the operation has not been stopped, the activation prohibition for prohibiting the activation of the power generation unit Ha is set (# 3), and then the operation of the reforming processing device 3 and the fuel cell 4 is stopped. The treatment (steam purge treatment, gas purge treatment) is executed (# 4).
After the operation stop treatment, a first pressure holding treatment for keeping the internal pressure of the reforming treatment device 3 at an appropriate pressure and a second pressure holding treatment for keeping the internal pressure at the fuel electrode 4n of the fuel cell 4 at an appropriate pressure are performed. , It is executed as a process different from the leak judgment avoidance process.

Next, the duration of continuing the state in which the flow rate of the fuel gas G supplied to the energy supply unit H is equal to or less than the set determination amount (for example, 1.0 L / h) is equal to or longer than the set determination time (for example, 2 minutes). It is determined whether or not the integrated value of the duration is equal to or greater than the set value (for example, 60 minutes or more) (# 5), and the integrated value is equal to or greater than the set value (for example, 60 minutes or more). If it is determined that the start prohibition release condition is satisfied, the start prohibition is released in order to allow the start of the power generation unit Ha (# 6).

If it is determined in # 5 that the integrated value is not greater than or equal to the set value (for example, 60 minutes or more), the scheduled processing time (for example, 12 hours) has elapsed since the timing of the warning processing period was started. Whether or not it is determined (# 7), and if the scheduled processing time has elapsed, a warning process is executed in which a message prompting the user to refrain from consuming the fuel gas G is displayed on the remote controller R (# 8).

In addition, in the present embodiment, when the heating start condition in the heating device L is satisfied while the operation control unit C is executing the stop processing for avoiding leakage determination, the combustion for heating is performed until the heating stop condition is satisfied. The heat medium heating operation of the auxiliary heat source machine 2 as the vessel J is performed by intermittent combustion of the fuel gas G. In particular, as shown in FIG. 5, the operation control unit C sets the combustion stop period of the intermittent combustion to a length equal to or longer than the above setting determination time (for example, 2 minutes or longer). By doing so, even if the fuel gas G is intermittently burned in the auxiliary heat source machine 2 (combustor J for heating) for the heating operation processing while the stop processing for avoiding leakage determination is being executed, the microcomputer meter M The period during which the consumption of the fuel gas G supplied via the above is interrupted is equal to or longer than the above setting determination time. Therefore, there may be a time when the determination condition in which the fuel gas non-consumption state is considered to have occurred is satisfied. Even while the fuel gas G is intermittently burned, there is a high possibility that the state in which the flow rate of the fuel gas G is equal to or less than the set determination amount continues for the set determination time or longer. Then, there may be a time when the determination condition in which the fuel gas non-consumption state is considered to have occurred is satisfied. As a result, the combustion combustor for heating is executing the stop processing for avoiding leakage determination, that is, at least while the power generation unit Ha is trying to generate a fuel gas non-consumption state by not consuming the fuel gas G. Even if the fuel gas G is burned by J, the execution of the stop process for avoiding leakage determination, which stops the operation of the power generation unit Ha, is not wasted.

Further, even while the fuel gas G is intermittently burned, it is more likely that the state in which the flow rate of the fuel gas G is equal to or less than the set judgment amount continues for the set judgment time or longer, which means that the warning processing period is timed. This means that there is an increased possibility that the determination condition in which the fuel gas non-consumption state has occurred is satisfied before the scheduled processing time (for example, 12 hours) elapses from the start of the above. As a result, in the example shown in FIG. 6, the flow rate of the fuel gas G is set as the set determination amount (for example, 12 hours) before the scheduled processing time (for example, 12 hours) elapses after the timing of the warning processing period is started. For example, when the duration for continuing the state of 1.0 L / h) or less is equal to or longer than the set determination time (for example, 2 minutes or longer), the integrated value of the duration is equal to or longer than the set value (for example, 60 minutes or longer). Is more likely to be. As a result, it becomes difficult to perform the warning process (# 8) for displaying a message prompting the user to refrain from consuming the fuel gas G on the remote controller R. Therefore, it is unlikely that the user excessively weights the consumption of the fuel gas G and the user's comfort is impaired.

Further, even if the combustion stop period in the intermittent combustion of the fuel gas G in the heating combustor J becomes longer than the set determination time, the combustion heat for the heating heat medium circulating in the heating circulation path 56 during that period is used. Although heating is not performed, if the heating heat medium maintains a certain temperature, the temperature of the heating target space heated by the heating device L does not drop sharply. As a result, if the combustion continuation period and the combustion stop period are alternately repeated by the intermittent combustion of the fuel gas G, the purpose is to warm the heating target space even if the combustion stop period is longer than the set determination time. Is fully achieved.

(About freezing prevention of power generation part)
Next, the anti-freezing operation process of the power generation unit Ha will be described.
In the present embodiment, as shown in FIG. 1, the above-mentioned antifreezing heating burner 60 is provided so as to heat the hot water circulation path 5B as a heating target with combustion heat, and the power generation control unit Ca is provided. Based on the detection temperature of the cooling water temperature sensor 61 that detects the temperature of the cooling water in the cooling water storage tank Q, the antifreezing operation process for heating the hot water circulation path 5B is executed.

That is, the antifreezing heating burner 60 that functions as the antifreezing combustor N in a state where the power generation control unit Ca operates the cooling water circulation pump Pa and the hot water circulation pump Pb as the antifreezing operation process of the power generation unit Ha. Is configured to perform a process of raising the temperature of hot water in the hot water circulation path 5B by burning the water. That is, the antifreezing heating burner 60 is used to heat the antifreezing target by utilizing the combustion heat obtained by burning the fuel gas G supplied via the microcomputer meter M.
By the way, the cooling water of the cooling water circulation path 5A is heated by the hot water of the hot water circulation path 5B at the heat exchange section 5C, and as a result, the temperature of the fuel cell 4 and the like is also raised.

The anti-freezing operation process of the power generation unit Ha is started when the anti-freezing start condition is satisfied, and is terminated when the anti-freezing end condition is satisfied.
The antifreeze start condition in the antifreeze operation process of the power generation unit Ha is the condition that the detection temperature of the cooling water temperature sensor 61 is lower than the heating start temperature (for example, 4 ° C.), and the antifreeze end condition is the cooling water temperature. The condition is set so that the detection temperature of the sensor 61 is higher than the heating stop temperature (for example, 10 ° C.).

(About prevention of freezing of heat source)
Next, the antifreezing operation process of the heat source portion Hb will be described.
In the present embodiment, the auxiliary heat source machine 2 is combusted and operated as the anti-freezing combustor N, and as shown in FIG. 3, the anti-freezing electric heater D for heating the pipes circulates hot water. It is provided corresponding to each of the passage 5B, the hot water supply passage 58, and the first water supply passage 53a.

As shown in FIG. 3, each part of the multifunctional circulation path 54, that is, the downstream part of the auxiliary heat source machine 2, the downstream part of the heating heat exchanger 43 and the bath reheating heat exchanger 44, and the three-way valve 48. A first temperature detection sensor S1 for detecting the temperature of hot water in the multifunctional circulation path 54 is provided in each of the upstream portion and the upstream portion of the auxiliary heat source machine 2, and the plurality of first temperature detection sensors S1 are provided. Based on the detection information, an antifreeze operation process for burning and operating the auxiliary heat source machine 2 to heat the multifunctional circulation path 54 as a heating target is executed.

As shown in FIG. 3, the second temperature detection sensor S2 for detecting the operation control information of the antifreezing electric heater D is located upstream of the hot water supply mixing valve 45 in the water supply passage 53 and the hot water outlet passage 51, and the hot water supply passage 58. , The hot water supply path 52, and the hot water circulation path 5B, respectively.

Then, as an electric heater operating process for heating and operating the antifreeze electric heater D, the detection temperature of any one of the plurality of second temperature detection sensors S2 starts to start the operation of the antifreeze electric heater D. When it becomes lower than the temperature, the antifreeze electric heater D is operated, and when all the detection temperatures of the plurality of second temperature detection sensors S2 become higher than the stop temperature for stopping the operation of the antifreeze electric heater D. , The process of stopping the antifreeze electric heater D is configured to be executed.

7 and 8 are diagrams for explaining the execution timing of the heating operation process and the antifreeze operation process.
As shown in FIGS. 7 and 8, the operation control unit C freezes when the heat medium heating operation of the heating combustor J is performed by intermittent combustion while the leakage determination avoidance stop process is being executed. The antifreeze combustor N is combusted and operated to execute the antifreeze operation process within the combustion continuation period after the prevention start condition is satisfied, and the antifreeze combustor N is not combusted and operated within the combustion stop period. It is configured as follows. If the freeze prevention start condition is satisfied while the leakage determination avoidance stop process is not executed, the operation control unit C executes the freeze prevention operation process for combusting the antifreeze combustor N.

Specifically, as shown in FIG. 7, when the operation control unit C causes the heat medium heating operation of the heating combustor J to be performed by intermittent combustion while executing the stop processing for avoiding leakage determination. When the antifreeze start condition is satisfied during the combustion continuation period in which the fuel gas G is being burned, the antifreeze operation process for combusting and operating the antifreeze combustor N is executed during the combustion continuation period. As a result, as shown in FIG. 7, the amount of fuel gas burned increases by the amount of combustion operation of the antifreeze combustor N.
Further, as shown in FIG. 8, when the operation control unit C is performing the heat medium heating operation of the heating combustor J by intermittent combustion while executing the stop processing for avoiding leakage determination, the fuel gas If the antifreeze start condition is satisfied during the combustion stop period when G is not burned, the antifreeze operation process is not performed during the combustion stop period, but the antifreeze combustor N is performed during the subsequent combustion continuation period. Performs antifreeze operation processing to burn and operate.
In this way, when the heat medium heating operation of the heating combustor J is performed by intermittent combustion while the leakage determination avoidance stop process is being executed, even if the antifreeze combustor N is combusted. It is limited to the combustion duration in which the combustion combustor J is burning the fuel gas G. As a result, the combustion combustor for heating is executing the stop processing for avoiding leakage determination, that is, at least while the power generation unit Ha is trying to generate a non-consumed fuel gas state by not consuming the fuel gas G. Even if the fuel gas is burned by J and the antifreeze combustor N, it is ensured that at least the period during which the consumption of the fuel gas G supplied via the microcomputer meter M is interrupted exceeds the above setting determination time. To.

9 and 10 are diagrams for explaining the execution timing of the heating operation process and the pressure holding process.
As shown in FIGS. 9 and 10, the operation control unit C replenishes when the heat medium heating operation of the heating combustor J is performed by intermittent combustion while the leakage determination avoidance stop process is being executed. It is configured so that the first holding pressure treatment is executed within the combustion continuation period after the start condition is satisfied, and the first holding pressure treatment is not executed within the combustion stop period.

Specifically, as shown in FIG. 9, when the operation control unit C is performing the heat medium heating operation of the heating combustor J by intermittent combustion while executing the stop processing for avoiding leakage determination. When the replenishment start condition is satisfied during the combustion continuation period during which the fuel gas G is being burned, the fuel gas is replenished inside the reforming treatment device 3 of the power generation unit Ha during the combustion continuation period. 1 Execute the pressure holding process. As a result, as shown in FIG. 9, the amount of fuel gas consumed increases by the amount supplied to the reforming treatment apparatus 3.
Further, as shown in FIG. 10, when the operation control unit C is performing the heat medium heating operation of the heating combustor J by intermittent combustion while executing the stop processing for avoiding leakage determination, the fuel gas If the replenishment start condition is satisfied in the middle of the combustion stop period in which G is not burned, the first holding pressure treatment is not performed during the combustion stop period, but the first holding pressure treatment is performed during the subsequent combustion continuation period. Execute.
In this way, when the heat medium heating operation of the heating combustor J is performed by intermittent combustion while the leakage determination avoidance stop process is being executed, the first compensating process is performed to consume the fuel gas G. Even so, it is limited to the combustion duration in which the fuel gas is burned by the heating combustor J. As a result, the combustion combustor for heating is executing the stop processing for avoiding leakage determination, that is, at least while the power generation unit Ha is trying to generate a non-consumption state of fuel gas by not consuming the fuel gas G. Even if the fuel gas is burned in J and the fuel gas G is consumed in the first compression treatment, at least the period during which the consumption of the fuel gas G supplied via the microcomputer meter M is interrupted is equal to or longer than the above setting determination time. Is guaranteed to be.

[Second Embodiment]
In the above embodiment, the operation control unit C has described an example in which the heating operation process is started immediately when the heating start condition is satisfied, but the start timing of the heating operation process may be delayed.
Specifically, as shown in FIG. 11, the operation control unit C supplies the fuel gas G via the microcomputer meter M in the energy supply unit H while executing the stop processing for avoiding leakage determination. When the heating start condition is satisfied (that is, when the combustion start timing of the fuel gas G in the combustion continuation period in the heat medium heating operation of the heating combustor J is reached), the energy supply unit H is stopped. Combustion continuation period in the heat medium heating operation of the heating combustor J after the elapsed time from the stop of use of the fuel gas G supplied via the microcomputer meter M in the above exceeds the setting determination time. Combustion of fuel gas G (intermittent combustion) is started. If the heating start condition is satisfied while the leakage determination avoidance stop process is not being executed, the operation control unit C immediately executes the heating operation process.

The "utilization of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H" described here is described in the hot water supply operation process, the heating operation process, and the bath addition as described in the first embodiment. Refers to the use of fuel gas G in heating operation processing, holding pressure processing, and the like. Therefore, the operation control unit C refers to the measured values of the power generation side flow meter 59a and the heat source side flow meter 59b, or when the fuel valve V1 is operated in the closed state, the antifreeze heating burner 60 has stopped burning. Depending on the timing, the timing when the auxiliary heat source machine 2 stops combustion, etc., the elapsed time after the use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H is stopped becomes equal to or longer than the setting determination time. It can be determined whether or not it is.

In this way, after the elapsed time from when the use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H is stopped becomes equal to or longer than the setting determination time, the heating combustor J After the use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H is stopped by starting the combustion (intermittent combustion) of the fuel gas G during the combustion continuation period in the heat medium heating operation. Next, the interval until the fuel gas G is used for the heat medium heating operation of the heating combustor J is equal to or longer than the above setting determination time. That is, between the time when the use of the fuel gas G in the energy supply unit H is stopped and the time when the combustion of the fuel gas G (intermittent combustion) is started in the combustion continuation period in the heat medium heating operation of the heating combustor J. , There may be a time when the judgment condition that the fuel gas non-consumption state is considered to have occurred is satisfied. As a result, the combustion combustor for heating is executing the stop processing for avoiding leakage determination, that is, at least while trying to generate a non-consumption state of fuel gas by not consuming the fuel gas G in the power generation unit Ha. Even if the fuel gas is burned by J, it is ensured that at least the period during which the consumption of the fuel gas G supplied via the microcomputer meter M is interrupted is equal to or longer than the above setting determination time.

In addition, as shown in FIG. 12, when the freeze prevention start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit C goes through the microcomputer meter M in the energy supply unit H. When the use of the fuel gas G supplied is stopped, the anti-freezing combustor N is combusted and operated to prevent freezing after the elapsed time from the stop is equal to or longer than the set determination time. To start. If the antifreezing start condition is satisfied while the leakage determination avoidance stop process is not being executed, the operation control unit C immediately executes the antifreeze operation process for combusting the antifreeze combustor N.

In this way, the interval between the stop of use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H and the next combustion operation of the fuel gas G in the antifreeze combustor N. Is longer than the above setting determination time, so it is determined that a fuel gas non-consumption state has occurred between the time when the use of the fuel gas G in the energy supply unit H is stopped and the time when the antifreeze operation process is started. There may be times when the conditions are met. As a result, antifreeze combustion is performed while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit Ha is trying to generate a fuel gas non-consumption state by not consuming the fuel gas G. Even if the fuel gas is burned in the vessel N, it is ensured that at least the period during which the consumption of the fuel gas G supplied via the microcomputer meter M is interrupted is equal to or longer than the above setting determination time.

Further, as shown in FIG. 13, when the replenishment start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit C supplies the fuel via the microcomputer meter M in the energy supply unit H. When the use of the fuel gas G is stopped, the fuel gas G is replenished inside the power generation unit Ha after the elapsed time from the stop exceeds the setting determination time, and the first holding pressure is held. Start processing. If the replenishment start condition is satisfied while the leakage determination avoidance stop process is not being executed, the operation control unit C immediately executes the first pressure holding process.

In this way, the interval from when the use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H is stopped until the next start of the first holding pressure process is equal to or longer than the above setting determination time. Therefore, it is a time when the judgment condition that the fuel gas non-consumption state is considered to have occurred is satisfied between the time when the use of the fuel gas G in the energy supply unit H is stopped and the time when the first holding pressure treatment is started. Can exist. As a result, the first holding pressure is held while the leakage determination avoidance stop process is being executed, that is, at least while the power generation unit Ha is trying to generate the fuel gas non-consumed state by not consuming the fuel gas G. Even if the fuel gas G is consumed by the processing, it is ensured that at least the period during which the consumption of the fuel gas G supplied via the microcomputer meter M is interrupted is equal to or longer than the above setting determination time.

Furthermore, when the use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H is stopped, the elapsed time from the stop is before the set determination time or more. When the replenishment start condition is satisfied, the heating start condition is satisfied, and the antifreeze prevention start condition is satisfied, as shown in FIG. 14, the operation control unit C has elapsed time since it was stopped. The first pressure holding process, the antifreezing operation process, and the heating operation process may be started after the set determination time or longer is reached.

[Another Embodiment]
(1) In the above embodiment, the configuration of the energy supply system has been described with specific examples, but the configuration can be changed as appropriate.
For example, in the above embodiment, the operation control unit C that controls the operation of the energy supply unit H is the power generation control unit Ca that controls the operation of the power generation unit Ha and the heat source control unit Cb that controls the operation of the heat source unit Hb. Although the case of being composed of the above is illustrated, the operation control unit C may be integrated as one control unit by combining the power generation control unit Ca and the heat source control unit Cb as one control unit. ..
Further, in the above embodiment, the case where the power generation unit Ha and the heat source unit Hb are configured as separate units is illustrated, but the case where the power generation unit Ha and the heat source unit Hb are configured as one unit may be implemented. Good.
Further, in the above embodiment, the case where the power generation unit Ha includes the reforming processing device 3 and the fuel cell 4 is illustrated, but the power generation unit Ha is driven by an engine operated by the fuel gas G and the engine. The present invention can also be applied to the case where the generator is provided.
Further, in the above embodiment, the case where the heat source portion Hb having the hot water storage tank 1 is provided is illustrated, but the heat source portion Hb including the hot water storage tank 1 may be omitted.
Furthermore, in the above embodiment, the case where the heat source unit Hb is provided with the anti-freezing electric heater D is illustrated, but the power generation unit Ha is also provided with the anti-freezing electric heater D. May be good.

(2) In the above embodiment, the ultrasonic type microcomputer meter M is illustrated, but the present invention can also be applied to the membrane type microcomputer meter M. In this case, the judgment condition for being considered to be the fuel gas non-consumption state is, for example, a state in which the flow rate of the fuel gas G is equal to or less than the set judgment amount (for example, 1.0 L / h) is the set judgment time or more ( For example, it is defined as a continuous condition (60 minutes or more). Therefore, in the case of the membrane type microcomputer meter M, if the above determination conditions are not satisfied (that is, if the fuel gas non-consumption state does not occur) in the leakage determination period (for example, 30 days) of the microcomputer meter M, The microcomputer meter M activates an alarm or cuts off the supply of the fuel gas G.

Further, when the microcomputer meter M is configured as a film type, "whether the integrated value is equal to or more than the set value (for example, 60 minutes or more)" performed in # 5 of the flowchart of the leakage determination avoidance process shown in FIG. The determination of "whether or not" is defined as "whether or not the state in which the flow rate of the fuel gas G is equal to or less than the set determination amount (for example, 1.0 L / h) continues for the set determination time or more (for example, 60 minutes or more)". It may be replaced with a judgment. Then, in the flow chart # 5 of the leakage determination avoidance process, the power generation control unit Ca sets the flow rate of the fuel gas G supplied to the energy supply unit H to be less than or equal to the set determination amount (for example, 1.0 L / h). When it is determined that the following states are continuous for the set determination time or longer (for example, 60 minutes or longer), it is determined that the activation prohibition release condition is satisfied, and the activation prohibition is released in order to allow the activation of the power generation unit Ha. It will be (# 6).

(3) In the above embodiment, regarding the start timing of the first holding pressure treatment, even if the above replenishment starting condition is satisfied, the first holding pressure treatment is performed within the combustion stop period of the intermittent combustion of the heating combustor J. If the operation is not performed and the elapsed time from the stop of use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H is not equal to or longer than the above setting determination time, the first holding pressure is held. It was explained that the treatment is not performed, but under urgent conditions, the inside of the power generation unit Ha is immediately replenished with the fuel gas G to start the pressure holding treatment for increasing the pressure in the pressure holding target area. You may.

In this case, the urgent replenishment is higher than the replenishment start condition described in the above embodiment (that is, the urgency is high to replenish the fuel gas G inside the power generation unit Ha to increase the pressure in the pressure-retaining target region). Set the starting conditions. For example, the replenishment start condition is the first lower limit pressure in which the pressure in the pressure holding target region inside the power generation unit Ha is less than the first set appropriate pressure (for example, 1.0 kpa), as described in the above embodiment. It is defined as a condition for reducing to (for example, 0.5 kpa) or less. In addition, the emergency replenishment start condition is defined as a condition in which the pressure in the holding pressure target region drops to a predetermined pressure (for example, 0.2 Kpa) lower than the first lower limit pressure (for example, 0.5 kpa). There is. That is, it can be said that the situation in which the emergency replenishment start condition is satisfied is a situation in which it is highly necessary to urgently replenish the fuel gas G inside the power generation unit Ha because the pressure in the holding pressure target region is too low.

Then, when the power generation control unit Ca is performing the heat medium heating operation of the heating combustor J by intermittent combustion while executing the stop processing for avoiding leakage determination, the above emergency replenishment start condition is satisfied. And, regardless of whether it is within the combustion continuation period or the combustion stop period of the intermittent combustion, the fuel gas G is immediately replenished inside the power generation unit Ha and the pressure in the pressure holding target region is set first. An emergency holding pressure treatment is performed to increase the pressure to an appropriate pressure (for example, 1.0 kpa) or higher. Alternatively, if the emergency replenishment start condition is satisfied while the power generation control unit Ca is executing the stop process for avoiding leakage determination, the fuel gas G supplied via the microcomputer meter M in the energy supply unit H Regardless of whether or not the elapsed time since the use of the power generation unit was stopped is equal to or longer than the above setting determination time, the fuel gas G is immediately replenished inside the power generation unit Ha and the pressure in the pressure holding target region is first set. An emergency pressure holding process is performed to increase the pressure to an appropriate pressure (for example, 1.0 kpa) or higher.

(4) In the above embodiment, regarding the start timing of the antifreeze operation process, even if the above antifreeze start condition is satisfied, the antifreeze operation process is performed within the combustion stop period of the intermittent combustion of the heating combustor J. If there is no such thing and the elapsed time from the stop of use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H is not more than the above setting determination time, the antifreeze operation process is performed. Although it has been explained that this is not performed, under urgent conditions, modifications may be made to immediately start an antifreeze operation in which the antifreeze target is heated by the combustion heat obtained by burning the fuel gas G.

In this case, the emergency anti-freezing start condition is higher than the anti-freezing start condition described in the above embodiment (that is, the anti-freezing target is heated by the combustion heat obtained by burning the fuel gas G). Is set. For example, the antifreezing start condition is set to a condition in which the detection temperature of the cooling water temperature sensor 61 is lower than the heating start temperature (for example, 4 ° C.), as described in the above embodiment. In addition, the emergency freezing prevention start condition is defined as a condition in which the detection temperature of the cooling water temperature sensor 61 is lowered to a predetermined temperature (for example, 1 ° C.) lower than the heating start temperature (for example, 4 ° C.). .. That is, it can be said that the situation in which the emergency freezing prevention start condition is satisfied is a situation in which the detection temperature of the cooling water temperature sensor 61 is too low and there is a high need to urgently heat the antifreezing target.

Then, when the power generation control unit Ca is performing the heat medium heating operation of the heating combustor J by intermittent combustion while executing the stop processing for avoiding leakage determination, the above-mentioned emergency freezing prevention start condition is satisfied. Then, regardless of whether the intermittent combustion is within the combustion continuation period or the combustion stop period, the cooling water circulation pump Pa and the hot water circulation pump Pb are immediately operated as the antifreeze combustor N. An emergency in which the detection temperature of the cooling water temperature sensor 61 is made higher than the heating stop temperature (for example, 10 ° C.) by burning and operating the functioning antifreeze heating burner 60 to raise the temperature of the hot water in the hot water circulation path 5B. Perform anti-freezing operation processing. Alternatively, if the emergency freeze prevention start condition is satisfied while the power generation control unit Ca is executing the leakage determination avoidance stop process, the fuel gas supplied via the microcomputer meter M in the energy supply unit H Regardless of whether or not the elapsed time since the use of G was stopped is equal to or longer than the above setting determination time, the cooling water circulation pump Pa and the hot water circulation pump Pb are immediately operated as the antifreezing combustor N. An emergency in which the detection temperature of the cooling water temperature sensor 61 is made higher than the heating stop temperature (for example, 10 ° C.) by burning and operating the functioning antifreezing heating burner 60 to raise the temperature of the hot water in the hot water circulation path 5B. Execute anti-freezing operation processing.

(5) In the above embodiment, when the heat medium heating operation of the heating combustor J is executed by intermittent combustion, the timing for starting the combustion of the fuel gas G is while the leakage determination avoidance stop process is being executed. When the use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H is stopped, the fuel gas G in the combustion continuation period of the intermittent combustion in the heat medium heating operation of the heating combustor J Even if the combustion start timing is reached, the elapsed time from the stop of use of the fuel gas G supplied via the microcomputer meter M in the energy supply unit H must not exceed the above setting determination time. , It was explained that the combustion of the fuel gas G does not start during the combustion duration of the intermittent combustion in the heat medium heating operation of the heating combustor J, but under urgent conditions, the fuel in the heating combustor J is immediately generated. Modifications may be made to burn the gas G.

In this case, when the heat medium heating operation of the heating combustor J is executed by intermittent combustion, the emergency heating combustion start condition for determining whether or not the urgency to start the combustion of the fuel gas G is high is determined. deep. For example, the emergency heating combustion start condition is defined as a condition in which the temperature of the heating heat medium measured by the heat medium temperature sensor S3 is lowered to a temperature that is unsuitable for supplying the heating device L. That is, in the situation where the emergency heating combustion start condition is satisfied, the temperature of the heating heat medium measured by the heat medium temperature sensor S3 is too low to be supplied to the heating device L, so that the heating heat medium is urgently satisfied. It can be said that there is a high need to heat the.

Then, when the above-mentioned emergency heating combustion start condition is satisfied when the heat medium heating operation of the heating combustor J is executed by intermittent combustion, the power generation control unit Ca passes through the microcomputer meter M in the energy supply unit H. By immediately combusting the fuel gas G in the heating combustor J regardless of whether or not the elapsed time since the use of the fuel gas G supplied is stopped is equal to or longer than the above setting determination time. Heat the heating medium.

(6) In the above embodiment, the content of the antifreezing operation process performed in the energy supply system, the content of the pressure holding process, and the like have been described with specific examples, but the configuration can be changed as appropriate.
For example, in the above embodiment, the case where the antifreezing operation process for combusting the antifreezing combustor N is executed in each of the power generation unit Ha and the heat source unit Hb has been illustrated, but the power generation unit Ha and the heat source unit Hb have been illustrated. On one side, the anti-freezing operation process for combusting the anti-freezing combustor N is executed, and on the other side, the anti-freezing electric heater D is operated to prevent freezing. The specific configuration for preventing freezing of the heat source portion Hb can be variously changed.
Further, in the above embodiment, the case where the first pressure holding process of the reformer processing device 3 is performed based on the detection information of the pressure sensor 35 on the reformer processing device side is illustrated. For example, the reformer temperature sensor 34. The specific configuration of the first holding pressure treatment can be variously changed, for example, the fuel gas G is filled by a set amount each time the detection temperature T drops by the set temperature Ts (for example, 50 ° C.).
Further, in the above embodiment, the second pressure holding treatment for the fuel cell 4 is carried out in the form of supplying the fuel gas G filled in the reforming processing apparatus 3, but the fuel gas G from the microcomputer meter M is supplied. It may be carried out in the form. In this case, the second holding pressure treatment for the fuel cell 4 is determined to be consuming the fuel gas G, similarly to the first holding pressure treatment of the reforming processing apparatus 3.
Furthermore, in the above embodiment, the case where the heat source unit Hb performs the heating operation process and the bath reheating operation process is illustrated, but the case where the heat source unit Hb does not execute the heating operation process and the bath reheating operation process is performed. May be good.
Further, in the above embodiment, the case where the second pressure holding treatment is performed on the fuel cell 4 is illustrated, but the second pressure holding treatment on the fuel cell 4 may be omitted.

(7) In the above embodiment, an example in which the reforming treatment device 3 and the fuel cell 4 are separately held in pressure, that is, the reforming treatment device 3 is subjected to the first pressure holding treatment and the fuel cell 4 is held in the first pressure. 2 Although the example of performing the pressure holding treatment has been described, the reforming processing device 3 and the fuel cell 4 may be held together. That is, both the reforming processing device 3 and the fuel cell 4 may be used as the pressure-holding target region inside the power generation unit Ha described above. Specifically, while the first filling process and the first holding pressure process are being performed, the generated gas outlet valve V2 provided in the middle of the fuel cell supply path 24 is always kept open. As a result, the reforming processing device 3 and the fuel cell 4 are maintained in a state in which gas can move to each other, and the reforming processing device 3 and the fuel cell 4 are integrally held.

(8) In the above-described embodiment, the contents of the processing performed in the energy supply system have been described by giving specific numerical values, but these numerical values are described for the purpose of exemplification and can be changed as appropriate.

(9) The configuration disclosed in the above embodiment (including another embodiment) can be applied in combination with the configuration disclosed in other embodiments as long as there is no contradiction. The embodiments disclosed in the present specification are examples, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be used in an energy supply system that can appropriately bring about a non-consumption state of fuel gas even if fuel is consumed for heating while the stop processing for avoiding leakage determination is being executed.

2 Auxiliary heat source machine 3 Reform processing device 4 Fuel cell 4n Fuel pole C Operation control unit G Fuel gas H Energy supply unit Ha Power generation unit J Heating combustor L Heating device M Microcomputer meter N Antifreeze combustor

Claims (13)

When a fuel gas non-consumption state that satisfies a predetermined judgment condition including the state where the flow rate of fuel gas is equal to or less than the set judgment amount continues for the set judgment time or more does not occur during the leakage judgment period, an alarm is activated or An energy supply unit including a microcomputer meter that shuts off the supply of fuel gas, a power generation unit that generates power using fuel gas supplied via the microcomputer meter, and an operation control unit that controls the operation of the energy supply unit. With
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Ri length der,
The energy supply unit has an antifreeze combustor that heats an antifreeze target by using combustion heat obtained by burning fuel gas supplied via the microcomputer meter.
The operation control unit
If the anti-freezing start condition is satisfied while the stop process for avoiding leakage determination is not executed, the anti-freezing operation process for combusting and operating the anti-freezing combustor is executed.
When the heat medium heating operation of the heating combustor is performed by the intermittent combustion while the leakage determination avoidance stop process is being executed, the combustion continues after the antifreeze start condition is satisfied. An energy supply system in which the antifreeze combustor is combusted and operated within a period to execute the antifreeze operation process, and the antifreeze combustor is not combusted and operated within the combustion stop period . When a fuel gas non-consumption state that satisfies a predetermined judgment condition including the state where the flow rate of fuel gas is equal to or less than the set judgment amount continues for the set judgment time or more does not occur during the leakage judgment period, an alarm is activated or An energy supply unit including a microcomputer meter that shuts off the supply of fuel gas, a power generation unit that generates power using fuel gas supplied via the microcomputer meter, and an operation control unit that controls the operation of the energy supply unit. With
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Is the length
The power generation unit includes a reforming processing apparatus that performs a hydrogen gas generation process that steam reforms the fuel gas to generate hydrogen gas, and a fuel cell that performs a power generation operation using the hydrogen gas generated by the hydrogen gas generation process. And have
The operation control unit
When the power generation unit is stopped, the fuel supplied to the pressure-holding target area inside the power generation unit via the microcomputer meter after stopping the hydrogen gas generation process in the reforming processing apparatus. While the first filling process of filling with gas and sealing with the pressure in the pressure-holding target region set to the first set appropriate pressure or higher is executed, and then the stop process for avoiding leakage determination is not executed. When the replenishment start condition is satisfied by reducing the pressure in the pressure holding target region to the first lower limit pressure lower than the first set appropriate pressure, the fuel gas is replenished inside the power generation unit and the pressure holding target The first pressure holding process for making the pressure in the region equal to or higher than the first set appropriate pressure is executed.
When the heat medium heating operation of the heating combustor is performed by the intermittent combustion while the leakage determination avoidance stop process is being executed, the combustion continuation period after the replenishment start condition is satisfied. An energy supply system that executes the first holding pressure treatment within and does not execute the first holding pressure treatment within the combustion stop period. As the first filling process, the operation control unit fills the inside of the reforming processing device as the pressure holding target region with fuel gas supplied via the microcomputer meter, and the reforming processing device of the reforming processing device. A process of sealing with the internal pressure equal to or higher than the first set appropriate pressure is executed.
The second aspect of the present invention, wherein as the first pressure holding treatment, a treatment of replenishing the inside of the reforming treatment apparatus with fuel gas to make the pressure inside the reforming treatment apparatus equal to or higher than the first set appropriate pressure is executed. Energy supply system. When the power generation unit is stopped, the operation control unit is supplied to the fuel electrode region of the fuel cell via the reforming processing device after stopping the power generation operation of the fuel cell. A second filling process for sealing the fuel electrode region is executed in a state where the fuel is filled with gas and the pressure is equal to or higher than the second set appropriate pressure, and then the pressure in the fuel electrode region is less than the second set appropriate pressure. When the filling pressure drops to the lower limit, the gas existing inside the reforming treatment apparatus is replenished to the fuel electrode region, and a second holding pressure treatment is executed to make the pressure in the fuel electrode region equal to or higher than the second set appropriate pressure. The energy supply system according to claim 3. When a fuel gas non-consumption state that satisfies a predetermined judgment condition including the state where the flow rate of fuel gas is equal to or less than the set judgment amount continues for the set judgment time or more does not occur during the leakage judgment period, an alarm is activated or An energy supply unit including a microcomputer meter that shuts off the supply of fuel gas, a power generation unit that generates power using fuel gas supplied via the microcomputer meter, and an operation control unit that controls the operation of the energy supply unit. With
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Is the length
When the operation control unit is stopped using the fuel gas supplied via the microcomputer meter in the energy supply unit while the leakage determination avoidance stop process is being executed, the operation control unit is stopped.
When the combustion start timing of the fuel gas in the combustion continuation period in the heat medium heating operation of the heating combustor comes, the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. An energy supply system that starts combustion of fuel gas during the combustion continuation period in the heat medium heating operation of the heating combustor after the elapsed time from the time becomes equal to or longer than the setting determination time. When a fuel gas non-consumption state that satisfies a predetermined judgment condition including the state where the flow rate of fuel gas is equal to or less than the set judgment amount continues for the set judgment time or more does not occur during the leakage judgment period, an alarm is activated or An energy supply unit including a microcomputer meter that shuts off the supply of fuel gas, a power generation unit that generates power using fuel gas supplied via the microcomputer meter, and an operation control unit that controls the operation of the energy supply unit. With
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Is the length
The energy supply unit has an antifreeze combustor that heats an antifreeze target with combustion heat obtained by burning fuel gas supplied via the microcomputer meter.
The operation control unit
If the anti-freezing start condition is satisfied while the stop process for avoiding leakage determination is not executed, the anti-freezing operation process for combusting and operating the anti-freezing combustor is executed.
When the freeze prevention start condition is satisfied while the leakage determination avoidance stop process is being executed, the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. An energy supply system that starts the antifreezing operation process by combusting the antifreezing combustor after the elapsed time from the stop is equal to or longer than the setting determination time. When a fuel gas non-consumption state that satisfies a predetermined judgment condition including the state where the flow rate of fuel gas is equal to or less than the set judgment amount continues for the set judgment time or more does not occur during the leakage judgment period, an alarm is activated or An energy supply unit including a microcomputer meter that shuts off the supply of fuel gas, a power generation unit that generates power using fuel gas supplied via the microcomputer meter, and an operation control unit that controls the operation of the energy supply unit. With
The operation control unit stops the operation of the power generation unit until the start prohibition release condition is satisfied before the period in which the fuel gas non-consumption state does not occur reaches the leakage determination period. An energy supply system that is configured to perform
The energy supply unit uses the combustion heat obtained by burning the fuel gas supplied via the microcomputer meter to perform a heat medium heating operation for heating a heating heat medium for heating the heating target space. Have a combustor for heating to do
When the heating start condition is satisfied while the leakage determination avoidance stop process is being executed, the operation control unit performs the heat medium heating operation of the heating combustor with fuel gas until the heating stop condition is satisfied. Let it be done by intermittent combustion,
The intermittent combustion is a combustion operation in which a continuous combustion period in which fuel gas is continuously burned and a combustion stop period in which fuel gas combustion is stopped are alternately repeated, and the combustion stop period is equal to or longer than the set determination time. Is the length
The power generation unit includes a reforming processing apparatus that performs a hydrogen gas generation process that steam reforms the fuel gas to generate hydrogen gas, and a fuel cell that performs a power generation operation using the hydrogen gas generated by the hydrogen gas generation process. And have
The operation control unit
When the power generation unit is stopped, the fuel supplied to the pressure-holding target area inside the power generation unit via the microcomputer meter after stopping the hydrogen gas generation process in the reforming processing apparatus. A first filling process is executed in which gas is filled and the pressure in the pressure-holding target region is set to be equal to or higher than the first set appropriate pressure, and then the pressure in the pressure-holding target region is set to the first set appropriate. When the replenishment start condition is satisfied by lowering to the first lower limit pressure less than the pressure, the fuel gas is replenished inside the power generation unit to make the pressure in the pressure holding target region equal to or higher than the first set appropriate pressure. 1 Execute pressure holding process,
When the replenishment start condition is satisfied while the leakage determination avoidance stop process is being executed, when the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. An energy supply system that replenishes fuel gas inside the power generation unit and starts the first pressure holding process after the elapsed time from the stoppage exceeds the set determination time. The power generation unit includes a reforming processing apparatus that performs a hydrogen gas generation process that steam reforms the fuel gas to generate hydrogen gas, and a fuel cell that performs a power generation operation using the hydrogen gas generated by the hydrogen gas generation process. And have
The operation control unit
When the power generation unit is stopped, the fuel supplied to the pressure-holding target area inside the power generation unit via the microcomputer meter after stopping the hydrogen gas generation process in the reforming processing apparatus. While the first filling process of filling with gas and sealing with the pressure in the pressure-holding target region set to the first set appropriate pressure or higher is executed, and then the stop process for avoiding leakage determination is not executed. When the replenishment start condition is satisfied by reducing the pressure in the pressure holding target region to the first lower limit pressure lower than the first set appropriate pressure, the fuel gas is replenished inside the power generation unit and the pressure holding target The first pressure holding process for making the pressure in the region equal to or higher than the first set appropriate pressure is executed.
When the heat medium heating operation of the heating combustor is performed by the intermittent combustion while the leakage determination avoidance stop process is being executed, the combustion continuation period after the replenishment start condition is satisfied. The energy supply system according to claim 1, wherein the first pressure-holding treatment is executed therein, and the first pressure-holding treatment is not executed within the combustion stop period. As the first filling process, the operation control unit fills the inside of the reforming processing device as the pressure holding target region with fuel gas supplied via the microcomputer meter, and the reforming processing device of the reforming processing device. A process of sealing with the internal pressure equal to or higher than the first set appropriate pressure is executed.
The eighth aspect of the present invention, wherein as the first pressure holding treatment, a treatment of replenishing the inside of the reforming treatment apparatus with fuel gas to make the pressure inside the reforming treatment apparatus equal to or higher than the first set appropriate pressure is executed. Energy supply system. When the power generation unit is stopped, the operation control unit is supplied to the fuel electrode region of the fuel cell via the reforming processing device after stopping the power generation operation of the fuel cell. A second filling process for sealing the fuel electrode region is executed in a state where the fuel is filled with gas and the pressure is equal to or higher than the second set appropriate pressure, and then the pressure in the fuel electrode region is less than the second set appropriate pressure. When the filling pressure drops to the lower limit, the gas existing inside the reforming treatment apparatus is replenished to the fuel electrode region, and a second holding pressure treatment is executed to make the pressure in the fuel electrode region equal to or higher than the second set appropriate pressure. The energy supply system according to claim 9. When the operation control unit is stopped using the fuel gas supplied via the microcomputer meter in the energy supply unit while the leakage determination avoidance stop process is being executed, the operation control unit is stopped.
When the combustion start timing of the fuel gas in the combustion continuation period in the heat medium heating operation of the heating combustor comes, the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. Claim 1 or 2 or 3 or claim 1 or 2 or 3 or that the combustion of the fuel gas is started in the combustion continuation period in the heat medium heating operation of the heating combustor after the elapsed time from the time becomes equal to or longer than the setting determination time. The energy supply system according to 4 or 8 or 9 or 10. The energy supply unit has an antifreeze combustor that heats an antifreeze target with combustion heat obtained by burning fuel gas supplied via the microcomputer meter.
The operation control unit
If the anti-freezing start condition is satisfied while the stop process for avoiding leakage determination is not executed, the anti-freezing operation process for combusting and operating the anti-freezing combustor is executed.
When the freeze prevention start condition is satisfied while the leakage determination avoidance stop process is being executed, the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. Claim 1 or 2 or 3 or 4 or claim 1 or 2 or 3 or 4 or that the antifreezing combustor is combusted and the antifreezing operation process is started after the elapsed time from the stop is equal to or longer than the set determination time. The energy supply system according to 5 or 8 or 9 or 10 or 11. The power generation unit includes a reforming processing apparatus that performs a hydrogen gas generation process that steam reforms the fuel gas to generate hydrogen gas, and a fuel cell that performs a power generation operation using the hydrogen gas generated by the hydrogen gas generation process. And have
The operation control unit
When the power generation unit is stopped, the fuel supplied to the pressure-holding target area inside the power generation unit via the microcomputer meter after stopping the hydrogen gas generation process in the reforming processing apparatus. A first filling process is executed in which gas is filled and the pressure in the pressure-holding target region is set to be equal to or higher than the first set appropriate pressure, and then the pressure in the pressure-holding target region is set to the first set appropriate. When the replenishment start condition is satisfied by lowering to the first lower limit pressure less than the pressure, the fuel gas is replenished inside the power generation unit to make the pressure in the pressure holding target region equal to or higher than the first set appropriate pressure. 1 Execute pressure holding process,
When the replenishment start condition is satisfied while the leakage determination avoidance stop process is being executed, when the use of the fuel gas supplied via the microcomputer meter in the energy supply unit is stopped. Claim 1 or 2 or 3 or 4 to replenish the inside of the power generation unit with fuel gas and start the first pressure holding process after the elapsed time from the stop becomes equal to or longer than the set determination time. Or the energy supply system according to 5 or 6 or 8 or 9 or 10 or 11 or 12.

Images