JP2016223690A - Gas power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas power generation system for minimizing loss of an operation merit while suppressing erroneous determination of a microcomputer meter while being low cost.SOLUTION: A gas power generation system comprises: a power generation unit 21 for generating power by consuming gas G; and a control part 22 for controlling an operation of the power generation unit 21, is provided with a gas leak detection device 1 for determining that there is a possibility of gas leak when a state in which gas is not continuously consumed for a first predetermined period does not exist in a predetermined gas leak detection period on an upstream side than the power generation unit 21. The control part 22 repeatedly executes power generation stop processing for stopping power generation by stopping consumption of the gas by the power generation unit 21 during a stop continuation time longer than the first predetermined period at intervals equal to or less than the gas leak detection period, and comprises: season determination means 41 for determining a present season; and stop continuation time determination decision means 42 for deciding the stop continuation time according to the present season determined by the season determination means 41.SELECTED DRAWING: Figure 1

Description

  The present invention includes a power generation unit that consumes gas supplied through a gas supply pipe and generates power, and a control unit that controls the operation of the power generation unit, and the gas supply upstream of the power generation unit In the predetermined part of the pipe, the state where no gas is continuously consumed for the first predetermined period downstream from the predetermined part does not exist in the predetermined gas leak detection period longer than the first predetermined period. A gas leakage detection device that determines that there is a possibility of gas leakage downstream from the predetermined part, and the control unit is configured to generate the power generation unit for a stop duration longer than the first predetermined period. The present invention relates to a gas power generation system that repeatedly executes a power generation stop process for stopping gas generation and stopping power generation at intervals equal to or shorter than the gas leakage detection period.

  The gas power generation system that consumes gas to generate power is a gas engine system consisting of a gas engine and a generator driven by the gas engine, or a fuel gas (hydrogen etc.) generated by reforming the gas. Fuel cell systems that generate power using fuel gas are known. Gas used as fuel for these gas power generation systems is often supplied via a gas leak detection device having a protection function for detecting a gas leak and performing a warning or a gas shut-off operation. As the gas leakage detection device, a gas meter with a microcomputer function provided in a gas supply pipe is generally used.

  Currently, in a gas leak detection device that is generally used, in order to detect a small amount of gas leak, when the average value of the gas flow rate within a continuous fixed period (first predetermined period) is below a threshold value, The first predetermined period is determined to be “no gas leak”, and no “no gas leak” is determined for a certain period longer than the first predetermined period (hereinafter referred to as a gas leak detection period). In such a case, it has a function of determining that there is a possibility of gas leakage and issuing an alarm.

  On the other hand, some gas power generation systems operate by consuming gas continuously for a long time. For this reason, the use of gas in the gas power generation system does not make any judgment of “no gas leak” during the gas leak detection period, and the gas leak detection device may erroneously determine “there is a possibility of gas leak”. is there. In order to avoid this erroneous determination, the gas power generation system normally performs periodic automatic stop and automatic return operations. Specifically, it has a function of stopping the operation every predetermined period and providing a time zone in which no gas is used (hereinafter referred to as stop duration).

  However, even if a time zone in which no gas is used in the gas power generation system is provided, if other gas equipment (such as a stove, a fan heater, or a hot water floor heater) operates during that time zone, the above average value of the gas flow rate Is likely to be greater than the threshold. Therefore, even though the operation of the gas power generation system is stopped, the gas leak detection device does not judge “no gas leak”, and as a result, judges that “gas leak is possible” and issues an alarm. Can occur.

  In order to solve this problem, in conventional gas power generation systems, by setting the stop duration to a long time, the risk of erroneous gas leak detection by the gas leak detector due to the operation of other gas equipment during the stop duration And the certainty of avoiding the erroneous determination described above is ensured.

  Specifically, in a gas leak detection device that is generally used, it is not determined that there is no gas leak for about 1 hour (first predetermined period) over about 30 days (gas leak detection period). If it is detected, it is determined that there is a possibility of gas leakage and an alarm is issued. Therefore, in the gas power generation system, the operation is stopped once every about 30 days, and the time when the gas consumption is zero is continued for about 24 hours (stop duration).

In this way, ideally, the operation of the gas power generation system should be stopped for about 1 hour (first predetermined period). In practice, however, the gas power generation system is operated for about 24 hours that greatly exceeds the first predetermined period. Stopped. In other words, the operation time of the gas power generation system is reduced, and the user of the gas power generation system loses the benefits that were originally enjoyed in various aspects such as utility costs, energy savings, and CO ₂ savings (hereinafter referred to as operating benefits). It will be.

  As a means for reducing the loss of these operating merits, for example, in Patent Document 1, the presence or absence of human activity is determined by various detection means, and the non-use time zone of the gas is estimated. The structure which sets the time slot | zone (stop continuation time) which stops gas supply of this to the estimated gas non-use time slot | zone is disclosed.

  Further, Patent Document 2 discloses a configuration in which a plurality of candidate dates for shutting down the gas power generation system are provided, calculation is performed from patterns of power demand and hot water supply demand stored in advance, and an optimal stop date is selected.

JP 2011-175816 A JP 2005-353292 A

  As described above, when the stop duration time of the gas power generation system is set to be long, there is a problem that the loss of driving merit is increased for the user. Moreover, if it is set to be short and dark, the gas leakage detection device may erroneously determine that “gas leakage is possible” and issue an alarm.

  In the technique disclosed in Patent Document 1, it is necessary to incorporate a means for detecting human activity in a gas power generation system, which increases the manufacturing cost. In addition, for example, when the user takes an irregular life pattern, there is a problem that a gas device is used in the estimated non-use time zone of gas and a risk of erroneous determination by the gas leak detection device is newly generated. . The technique disclosed in Patent Document 2 has a problem that the manufacturing cost increases because a storage device with a large capacity is required to store the pattern of electric power demand and hot water supply demand.

  As described above, the conventionally proposed configuration for reducing the loss of the operating merit can suppress the erroneous determination of the gas leak detection device, but it cannot be surely prevented. There is a problem that it becomes cost.

  Therefore, an object of the present invention is to provide a gas power generation system that can reduce the loss of operation merit while suppressing the erroneous determination of the gas leak detection device while being low in cost.

In order to achieve the above object, the characteristic configuration of the gas power generation system according to the present invention includes a power generation unit that generates power by consuming gas supplied through a gas supply pipe, and a controller that controls the operation of the power generation unit. With
The predetermined portion of the gas supply pipe on the upstream side of the power generation unit has a state in which gas is not continuously consumed for a first predetermined period downstream from the predetermined portion, which is longer than the first predetermined period. A gas leakage detection device is provided that determines that there is a possibility of gas leakage downstream of the predetermined portion when the gas leakage detection period does not exist,
The control unit repeatedly executes power generation stop processing for stopping power generation by stopping gas consumption in the power generation unit for a stop duration longer than the first predetermined period at intervals equal to or shorter than the gas leakage detection period. A gas power generation system,
Means for determining the current season,
And a stop duration determination unit that determines the stop duration according to the current season determined by the season determination unit.

  According to the above characteristic configuration, the stop duration of the gas power generation system is determined according to the season. In general, the usage status of gas appliances such as a stove and fan heater varies roughly from season to season. For example, referring to the usage status of gas appliances for each season as determined statistically, The stop duration required for each season can be grasped in advance. Specifically, for example, it is preferable to set the stop duration shorter in the summer when the gas equipment is relatively difficult to use, and set the stop duration longer in the winter when the gas equipment is often used. Therefore, by determining the stop duration for each season that is easy to judge, it is necessary and sufficient without setting the stop time of the gas power generation system uniformly while suppressing the possibility of misjudgment of the gas leak detector. It is possible to shorten the time. In other words, without adding a special means such as a means for detecting a person's activity, only by adding a means for determining the stop duration according to the season determined and the season determination, while being low cost, It is possible to provide a gas power generation system that can reduce the loss of operation merit while suppressing erroneous determination of the gas leak detection device.

The further characteristic configuration includes storage means for storing a correspondence table in which stop durations are associated with each other for a plurality of seasons,
The stop duration determination unit is configured to determine the stop duration with reference to the current season determined by the season determination unit and the correspondence table.

  According to the above characteristic configuration, the correspondence table is stored in the system, and the stop duration is determined with reference to the season determined by the season determination unit and the correspondence table. As the gas power generation system, it is only necessary to additionally store the correspondence table, and the cost increase of the gas power generation system can be suppressed. Therefore, the stop continuation time determining means can shorten the stop continuation time of the gas power generation system in accordance with the change in the gas usage situation according to the actual season of the user. That is, it is possible to provide a gas power generation system that can reduce the loss of operation merit while suppressing the erroneous determination of the gas leak detection device while being low in cost.

Another feature configuration is a storage unit that stores a correspondence table in which a temporary stop duration is associated with each of a plurality of seasons;
Temperature acquisition means for acquiring temperature information having a correlation with the outside air temperature,
The stop duration determination unit determines the temporary stop duration with reference to the current season determined by the season determination unit and the correspondence table, and determines the determined temporary stop duration as the temperature. It is in the point which determines the said stop continuation time by correct | amending based on the said temperature information acquired by the acquisition means.

  According to the above characteristic configuration, the stop duration determination unit determines the temporary stop duration determined according to the season, and corrects the temporary stop duration according to the temperature information acquired by the temperature acquisition unit. By doing so, the stop duration is determined. Since the gas power generation system is likely to include a temperature acquisition unit in the system in advance or a communication unit that enables communication with the outside, the gas power generation system can be used by diverting these devices as the temperature acquisition unit. The increase in cost can be suppressed. In general, even on a day belonging to the same season, the usage status of gas equipment varies finely depending on changes in the ambient temperature (outside temperature). For this reason, temperature information is acquired by the temperature acquisition means, and the temporary stop duration time is corrected based on the temperature information, so that the stop duration time can be made more consistent with the user's actual usage mode of gas equipment. It is possible to shorten the stop duration to a necessary and sufficient level. That is, it is possible to provide a gas power generation system that can reduce the loss of operation merit while suppressing the erroneous determination of the gas leak detection device while being low in cost.

  As a further feature, the season determination means determines the current season based on the current month and day on the calendar.

  According to the above characteristic configuration, the season is determined based on the current date on the calendar. In the method of determining the season based on the date when the power generation is stopped, there are few uncertain factors due to disturbance factors, and the season can be determined with high accuracy. Therefore, it is possible to provide a gas power generation system that can reduce loss of driving merit more accurately with a simple method of determination based on the current date.

In addition, as another additional feature configuration, it includes a temperature acquisition means for acquiring temperature information having a correlation with the outside air temperature,
The season determination means is to determine the current season based on the temperature information acquired by the temperature acquisition means.

  According to the above characteristic configuration, the season is determined based on temperature information having a correlation with the outside air temperature. In general, a gas power generation system is likely to be equipped with a temperature acquisition means or a communication means that enables communication with the outside in advance in the system. An increase in the cost of the power generation system can be suppressed. In addition, temperature information having a correlation with the outside air temperature (for example, the temperature in the system and the outside air temperature) usually varies greatly depending on the season. Therefore, it is possible to accurately determine the season by using these temperature information. it can. That is, it is possible to provide a gas power generation system that can reduce loss of operation merit more accurately and at low cost by diverting existing equipment.

Overview of the gas power generation system according to the first embodiment Gas power generation system flowchart Outline of gas power generation system according to second embodiment Graph showing the relationship between measured water temperature and stop duration Outline of gas power generation system according to third embodiment Graph showing the relationship between measured water temperature and stop duration correction value Outline of Gas Power Generation System According to Fourth Embodiment

[First Embodiment]
Below, the gas power generation system 2 which concerns on embodiment of this invention is demonstrated using figures. As shown in FIG. 1, the piping branches into a plurality of downstreams of a gas meter 1 provided for a consumer of the gas power generation system 2, and the gas G is supplied to the gas power generation system 2 and other gas equipment 3. Here, the gas meter 1 corresponds to a “gas leak detection device”, and the position where the gas meter 1 is provided corresponds to a “predetermined part”.

  The gas meter 1 is configured to be able to measure the flow rate of the gas G supplied to the gas power generation system 2. That is, the gas meter 1 is connected to a gas G supply source such as a gas company on the upstream side through a gas supply pipe 11, and connected to a gas power generation system 2 or gas equipment 3 installed in a consumer on the downstream side. Is done. As the gas meter 1, a so-called microcomputer meter is used in which the flow rate of gas flowing through the gas meter 1 is monitored by a built-in microcomputer, and it can be determined whether or not gas leakage has occurred on the downstream side of the gas meter 1.

  The gas meter 1 is configured to determine “no gas leakage” in the first predetermined period when the average value of the gas flow rate in the first predetermined period is equal to or less than a threshold value in order to detect a small amount of gas leakage. Is done. In addition, a function of determining that there is a possibility of gas leakage and issuing an alarm when no “gas leakage” is determined in the gas leakage detection period set longer than the first predetermined period. I have.

  Here, for example, 1 hour is set as the first predetermined period, and 30 days is set as the gas leakage detection period.

The gas power generation system 2 generates power by consuming the gas G supplied via the gas meter 1. As the gas power generation system 2, a gas engine system composed of a gas engine operated using the gas G as a fuel and a generator driven by the gas engine, or reforming the gas G to generate a fuel gas (H ₂ ), A fuel cell system that generates power using the generated fuel gas can be used. More specifically, as the fuel cell system, any of a polymer electrolyte fuel cell power generation system and a solid oxide fuel cell power generation system can be used. In the present embodiment, a fuel cell system is used as the gas power generation system 2.

  The gas power generation system 2 performs periodic automatic stop and automatic return operations. Specifically, the operation is stopped at every predetermined continuous operation period (for example, 30 days) (power generation stop processing is performed), and the stop duration t0 (for example, 24 hours) in which the gas power generation system 2 does not use the gas G at all. It is comprised so that it may provide. The continuous operation period is set to be shorter than the gas leakage detection period. Here, the continuous operation period corresponds to an “interval”.

  The gas equipment 3 corresponds to equipment such as a gas stove, a gas fan heater, and floor heating. In FIG. 1, a gas stove is illustrated as the gas device 3. In addition, although the structure which provides one gas apparatus 3 is illustrated, you may provide multiple gas apparatuses 3 in a consumer.

1. Detailed Configuration of Gas Power Generation System The gas power generation system 2 supplies power and heat to the user by supplying fuel gas, air, water, and the like. The gas power generation system 2 includes a power generation unit 21 that generates power using the gas G, and a control unit 22 for controlling the operation of the power generation unit 21. The control unit 22 of the gas power generation system 2 is configured by a known arithmetic device or storage device, and performs various calculations, and performs various controls such as output determination, operation, and stop of the power generation unit 21.

  Moreover, in this embodiment, the memory | storage means 23 which memorize | stored the information required when performing the control of a driving | operation of the electric power generation unit 21 and a stop is provided. In the figure, the control unit 22 and the storage unit 23 are shown as separate units. However, for example, the control unit 22 is configured using a system-on-a-chip (SoC) that includes the functions of the control unit 22 and the storage unit 23. The storage means 23 may be a single component.

  Here, the storage means 23 stores a correspondence table showing the setting of the monthly stop duration time t0 as shown in Table 1. In the present embodiment, the season is divided by “month”. Specifically, in the correspondence table, the stop duration t0 is 24 hours for the season “January” and the stop duration t0 is 24 hours for the season “February”. The stop duration t0 is stored in association with each season. The stop continuation time t0 is set longer as the season when the gas equipment 3 is used is higher, and shorter as the season when the usage frequency is lower. Specifically, it is long in the season when the gas equipment 3 is frequently used (winter; December to March), and short in the season when the gas equipment 3 is less used (summer; July to September). In these intermediate seasons (April-June, October-December), it is set to be an intermediate value with respect to the stop duration t0 of the adjacent season.

  The control unit 22 determines, based on the date and time information when the power generation unit 21 is stopped, the season determination unit 41 that determines the season at the time of stop, and the stop duration time t0 according to the season determined by the season determination unit 41. Stop duration determination means 42 is provided. Although not shown, the control unit 22 includes a time measuring unit that can acquire and measure date and time information such as the current time.

2. Operation Method of Gas Power Generation System An operation method of the gas power generation system 2 using Table 1 will be described using the flowchart of FIG. When the gas generator system 2 is in operation (the power generation unit 21 is generating power) (# 1) and the control unit 22 confirms that the scheduled stop time has arrived (# 2: Yes), the gas power generation The gas supply to the system 2 is stopped (# 3).

  Here, the stop time means the time when a continuous operation period (for example, about 30 days) has elapsed since the time when the previous operation was stopped and the operation was restarted. This stop time is the time to stop the gas supply, so if the gas power generation system 2 is configured to prepare for stop while using the gas G from the steady operation state to the gas supply stop, it is necessary for the stop preparation process The stop preparation process is configured to start in advance after a long time.

  When the gas supply is stopped, in this embodiment, the season determination unit 41 determines the current season (month) from the current month and day on the calendar, and the stop duration determination unit 42 stores the storage unit 23. The stop duration t0 corresponding to the current season (month) is read with reference to the correspondence table (Table 1) stored in (# 4). Subsequently, the control unit 22 substitutes 0 for the value tc held by the counter (time measuring means) in order to count the stop time (# 5), and starts measuring the elapsed time.

  When the stop of the gas supply continues for the stop duration t0 and the value tc reaches the stop duration t0 (# 6), the control unit 22 determines that it is time to permit the use of the gas G, and the control unit 22 Resumes the gas supply to the gas power generation system 2 (power generation unit 21) (# 7), and the operation of the gas power generation system 2 is resumed.

[Second Embodiment]
A gas power generation system 2 according to a second embodiment of the present invention will be described with reference to FIG. Compared to the first embodiment, the gas power generation system 2 of the present embodiment does not store a correspondence table in the storage unit 23, and the gas power generation system 2 includes a feed water temperature sensor 24 that measures the temperature inside the system. Different. Here, the case where the feed water temperature sensor 24 provided in advance is used for temperature measurement inside the gas power generation system 2 will be described as an example. The description of the same configuration as that of the first embodiment is omitted.

  Here, the feed water temperature sensor 24 corresponds to “temperature acquisition means”. Note that any temperature acquisition means may be used as long as it acquires temperature information correlated with the outside air temperature. In other words, any device that measures the part where the measured temperature varies depending on the season may be used. Instead of the feed water temperature sensor 24, an outside air temperature sensor, a temperature sensor that measures the temperature inside the gas power generation system 2, and the like are available. The temperature sensor may be used.

  The control unit 22 of the gas power generation system 2 calculates the supply water temperature measured by the supply water temperature sensor 24 (for example, calculates the average value for the most recent day), and acquires the result as the measured water temperature Tmsr. The water supply temperature sensor 24 itself may be configured to output an average value for the most recent day.

  Here, the measured water temperature Tmsr corresponds to “temperature information”. In the present embodiment, the season determination unit 41 regards “season” as determined by the measured water temperature Tmsr, and uses the measured water temperature Tmsr as an index indicating “season”. The stop duration determining means 42 determines the stop duration t0 based on the measured water temperature Tmsr.

  More specifically, the storage unit 23 stores the graph shown in FIG. FIG. 4 is a graph showing the relationship between the measured water temperature Tmsr and the stop duration t0. When the measured water temperature Tmsr is less than 10 ° C, the stop duration t0 is 24 hours. When the measured water temperature Tmsr is 10 ° C or more and less than 25 ° C, the stop duration t0 is -0.8 × Tmsr + 32 and the season is 25 ° C or more. Sets the stop duration t0 to 12 hours. That is, the stop duration determination means 42 of the control unit 22 reads the acquired measured water temperature Tmsr as the stop duration t0 based on the graph of FIG.

  In the present embodiment, the stop duration determination unit 42 obtains a stop duration t0 for continuing the gas supply stop from the graph of FIG. 4 when the operation of the gas power generation system 2 is stopped. When the stop of the gas supply is continued for the stop duration t0, the gas supply to the gas power generation system 2 is resumed, and the operation of the gas power generation system 2 is resumed.

  The determination of the stop duration t0 by the stop duration determination means 42 described above is performed in step # 4 of the flowchart shown in FIG. 2 as in the first embodiment. Since the operation control of the other gas power generation system 2 is the same as that of the first embodiment, description thereof is omitted.

[Third Embodiment]
A gas power generation system 2 according to a third embodiment of the present invention will be described with reference to FIG. In the present embodiment, the water supply temperature sensor 24 is provided, and in determining the stop duration t0, the temporary stop duration t0 is once determined, and the temporary stop duration t0 based on the temperature information acquired by the water supply temperature sensor 24. This is different from the above embodiment in that Here, the feed water temperature sensor 24 corresponds to “temperature acquisition means”.

  In the present embodiment, instead of the correspondence table shown in Table 1, the storage means 23 is a correspondence in which a set of the reference water temperature T0 and the stop duration t0 is associated with each season (month) as shown in Table 2. A table is stored. The storage unit 23 stores the graph shown in FIG. The graph of FIG. 6 shows the relationship between the difference between the measured water temperature Tmsr and the reference water temperature T0 and the correction value Δt for the stop duration t0.

  In the correspondence table shown in Table 2, the stop duration t0 is long in the season in which the gas equipment 3 is frequently used (winter; December to March) and in the season in which the gas equipment 3 is little used (summer; July to September). Is set to be a short time. Further, in these intermediate seasons (April to June, October to December), the intermediate season is set to have an intermediate value with respect to the stop duration t0 of the adjacent season. As the reference water temperature T0, a value representative of each season (for example, an average value in the season) is set.

  In calculating the stop duration t0 in actual control, the control unit 22 acquires the reference water temperature T0 and the stop duration t0 of the month corresponding to the stop time based on the correspondence table shown in Table 2. The control unit 22 obtains the difference between the measured water temperature Tmsr acquired from the feed water temperature sensor 24 and the acquired reference water temperature T0, and reads the correction value Δt of the stop duration t0 using the relationship shown in the graph of FIG.

  The stop duration determination unit 42 corrects the acquired stop duration t0 using the read correction value Δt. That is, the stop duration t0 + correction value Δt is set as the corrected stop duration t0.

  As a specific example, consider a case where the stop time of the gas power generation system 2 is determined to be April by the season determination means 41 and the acquired measured water temperature Tmsr is 16 ° C. The temporary stop duration t0 is determined to be 18 hours from the correspondence table of Table 2 by the stop duration determination means 42. Here, since the difference between the reference water temperature T0 in April and the measured water temperature Tmsr is 4 (= 16-12) ° C., -2 hours is adopted as the correction value Δt with reference to the graph of FIG. As a result, the stop duration t0 is corrected to 16 (= 18 + (− 2) = t0 + Δt) time, and the operation of the gas power generation system 2 (power generation unit 21) is stopped with the stop duration t0 set to 16 hours.

  The determination of the stop duration t0 by the stop duration determination means 42 described above is performed in step # 4 of the flowchart shown in FIG. 2 as in the first embodiment. Since the operation control of the other gas power generation system 2 is the same as that of the first embodiment, description thereof is omitted.

[Fourth Embodiment]
A gas power generation system 2 according to another embodiment of the present invention will be described with reference to FIG. The main difference from the above embodiment is that the gas power generation system 2 includes communication means 44 that can receive data input from an external network.

  The gas power generation system 2 in the present embodiment obtains temperature information such as the outside temperature of the area where the gas power generation system 2 is installed (based on weather forecasts, AMeDAS, etc.), for example, via a network and performs operation control. Use.

  In acquiring the temperature information Text, it is preferable that the gas power generation system 2 is configured to be able to acquire the installation position of the gas power generation system 2. Specifically, for example, a configuration in which position information acquisition means (not shown) such as GPS is mounted on the gas power generation system 2 or a structure in which the position information is stored in the storage means 23 at the time of installation in advance is preferable. In addition, the external server 4 is configured so that the gas power generation system 2 that performs communication can be uniquely recognized (for example, by using a production number), and after the external server 4 recognizes the installation location of the gas power generation system 2, The temperature information Text corresponding to the installation location of the gas power generation system 2 may be transmitted.

  In the control method of the gas power generation system 2 in the present embodiment, the measured water temperature Tmsr in the gas power generation system 2 shown in the description of the third embodiment is replaced with the temperature information Text obtained from the outside by the communication means 44. That is, the correction value Δt may be calculated by replacing the horizontal axis in FIG. 6 with temperature information Text−reference water temperature T0.

[Another embodiment]
(1) In the first, third, and fourth embodiments, an example has been shown in which the season determination unit 41 uses “month” as the “season” category. However, in the present invention, the “season” is classified in any unit as long as the difference in the usage status of the gas equipment 3 by the user of the gas power generation system 2 appears as the difference in the stop duration t0. It doesn't matter. For example, “four seasons (four types of spring, summer, autumn and winter)” may be used as the “season” category.

(2) In the above-described embodiment, an example in which the average value of the measured water temperature Tmsr on the previous day at the time of stoppage is used as the temperature information is shown. However, any temperature information having a correlation with the outside air temperature may be used. A thing may be used. For example, the measured water temperature Tmsr at the time of the latest water supply, the measured water temperature Tmsr at an arbitrary timing in one day including the stop time, or the measured water temperature Tmsr when water is not supplied may be directly used. In addition, when using such measured water temperature Tmsr, it is desirable to investigate the correlation between measured water temperature Tmsr and outside air temperature beforehand.

1: Gas meter (gas leak detection device)
2: Gas power generation system 23: Storage means 41: Season determination means 42: Stop duration determination means G: Gas Text: Temperature information Tmsr: Measurement water temperature (temperature information)
t0: Stop duration

Claims (5)

A power generation unit that consumes the gas supplied through the gas supply pipe to generate power, and a control unit that controls the operation of the power generation unit,
The predetermined portion of the gas supply pipe on the upstream side of the power generation unit has a state in which gas is not continuously consumed for a first predetermined period downstream from the predetermined portion, which is longer than the first predetermined period. A gas leakage detection device is provided that determines that there is a possibility of gas leakage downstream of the predetermined portion when the gas leakage detection period does not exist,
The control unit repeatedly executes power generation stop processing for stopping power generation by stopping gas consumption in the power generation unit for a stop duration longer than the first predetermined period at intervals equal to or shorter than the gas leakage detection period. A gas power generation system,
Means for determining the current season,
A gas power generation system comprising: a stop duration determination unit that determines the stop duration according to the current season determined by the season determination unit. Storage means for storing a correspondence table in which stop durations are associated for each of a plurality of seasons;
The gas power generation system according to claim 1, wherein the stop duration determination unit determines the stop duration with reference to the current season determined by the season determination unit and the correspondence table. Storage means for storing a correspondence table in which temporary stop durations are associated for each of a plurality of seasons;
Temperature acquisition means for acquiring temperature information having a correlation with the outside air temperature,
The stop duration determination unit determines the temporary stop duration with reference to the current season determined by the season determination unit and the correspondence table, and determines the determined temporary stop duration as the temperature. The gas power generation system according to claim 1, wherein the stop duration is determined by correcting the temperature based on the temperature information acquired by an acquisition unit.   The gas power generation system according to any one of claims 1 to 3, wherein the season determination unit determines the current season based on a current month and day on a calendar. A temperature acquisition means for acquiring temperature information having a correlation with the outside air temperature;
The gas power generation system according to any one of claims 1 to 3, wherein the season determination unit determines the current season based on temperature information acquired by the temperature acquisition unit.

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