JP6998054B2 - Power generation system - Google Patents

Description

The present invention relates to a power generation system in a hydrogenation system or a dehydrogenation system.

Conventionally, as in Patent Document 1, a dehydrogenation system has been proposed.

Japanese Patent No. 5632050

However, the heat generated by the dehydrogenation reaction is not used particularly effectively.

Therefore, an object of the present invention is to provide a power generation system capable of effectively utilizing the heat generated by the dehydrogenation reaction or the hydrogenation reaction.

The power generation system according to the present invention includes a hydrogenation reactor including a first passage provided with a first catalyst for promoting the hydrogenation reaction of aromatic compounds, and a first discharge extending from the first passage to the outside of the hydrogenation reactor. In a hydrogenation system having a tube, an electric heating device that heats at least one of a first passage and a first catalyst, and a heat exchange unit that cools at least one of the first passage, the first catalyst, and the first discharge tube, and heat exchange. A generator that generates power using the heat obtained by the unit and a power storage device that stores the power obtained by the generator are provided, and the electric heating device is driven at least based on the power from the power storage device.

The heat generated after the hydrogenation reaction is activated is converted into electrical energy by a generator.
Such electric energy is stored in the power storage device and then used to heat the electric heating device.
Therefore, the heat generated by the hydrogenation reaction can be effectively utilized. In particular, cooling of the hydrogenation reactor and discharge pipe and power generation can be realized at the same time, and the hydrogen reaction can be executed without using external energy as much as possible.

Further, as a heater for heating the hydrogenation reactor, an electric heating device driven by electricity is used.
Therefore, as a heater for heating the hydrogenation reactor, it is possible to reduce the generation of exhaust gas due to combustion as compared with the form of burning organic hydride or aromatic compound.

Preferably, a heat transfer device that can be switched on and off based on an electric signal is provided between at least one of the first passage and the first catalyst and the heat exchange unit, and the heat transfer device is either on or off. At one time, the heat of the hydrogenation reactor is transferred to the heat exchange section via the heat transfer device, and when the heat transfer device is either on or off, the heat transfer device is used. Therefore, the heat of the hydrogenation reactor is not transferred to the heat exchange section.

More preferably, the heat exchange unit contacts at least one of the first passage and the first catalyst via the heat transfer device and is connected to the discharge pipe without the heat transfer device.

More preferably, during the first mode of warming the first catalyst to activate the hydrogenation reaction inside the first passage, the flow rate of the heat medium flowing through the heat medium circulation path including the heat exchange unit per unit time. The pump of the heat medium circulation path is controlled so that During the second mode after activation, the pump of the heat medium circulation path is controlled so that the flow rate of the heat medium flowing through the heat medium circulation path per unit time becomes a second flow rate higher than the first flow rate. The electric heating device is stopped, and the power storage device is charged.

In the first mode, the power storage device is used to supply electric power to the electric heating device without charging.
In the second mode, the power storage device is used to charge the electric power generated by the generator without discharging.
Since the discharge and the charge are performed separately in terms of time, the burden on the power storage device can be reduced and the deterioration of the power storage device can be prevented as compared with the form in which the discharge and the charge are performed in the same time zone.

By maintaining the state in which the heat medium flows in the heat medium circulation path and the state in which the working medium flows in the working medium circulation path, it is difficult for the heat medium and the working medium to solidify or stay in the circulation path. I can.

Also, preferably, during the first mode of warming the first catalyst in order to activate the hydrogenation reaction inside the first passage, the flow of the heat medium in the heat medium circulation path including the heat exchange section is stopped. During the second mode after the pump of the heat medium circulation path is controlled, the electric heating device is driven, the charging in the power storage device is stopped, and the hydrogenation reaction inside the first passage is activated. The pump of the heat medium circulation path is controlled so that the heat medium flows in the heat medium circulation path, the electric heating device is stopped, and the power storage device is charged.

In the first mode, the power storage device is used to supply electric power to the electric heating device without charging.
In the second mode, the power storage device is used to charge the electric power generated by the generator without discharging.
Since the discharge and the charge are performed separately in terms of time, the burden on the power storage device can be reduced and the deterioration of the power storage device can be prevented as compared with the form in which the discharge and the charge are performed in the same time zone.

More preferably, the control of switching from the first mode to the second mode is performed based on the information regarding the temperature of at least one of the first passage and the first catalyst, and the temperature of at least one of the first passage and the second catalyst is set. When the first temperature threshold is exceeded, the first mode is switched to the second mode, and after switching to the second mode, the temperature of at least one of the first passage and the first catalyst is the first temperature. The pump of the heat medium circulation path is controlled so that the state close to the second temperature threshold, which is the same as or lower than the first temperature threshold, can be maintained.

As soon as the hydrogenation reaction becomes activating, aromatic compounds and hydrogen can be supplied to the hydrogenation reactor.

The flow rate of the heat medium circulation path is controlled so that the temperature in the vicinity of the catalyst is kept lowered to the second temperature threshold value lower than the first temperature threshold value. Therefore, the amount of heat obtained in the heat exchange unit is larger than that in the form in which the temperature in the vicinity of the catalyst is maintained at the first temperature threshold value, and the amount of power generation can be increased.

More preferably, the generator is connected to an expander provided in the working medium circulation path, and the heat medium flowing through the heat medium circulation path via the evaporator provided in the working medium circulation path is a heat medium. Heat exchange is performed with the working medium flowing through the working medium tree trunk path, and the boiling point of the working medium is lower than the boiling point of the heat medium.

Since the heat of the hydrogenation reactor and the first discharge pipe having a large temperature change is indirectly transferred to the working medium circulation path, the heat of the hydrogenation reactor and the first discharge pipe is directly transferred to the working medium circulation path. Compared to the form, it is possible to continue stable power generation regardless of whether the temperature of the hydrogenation reactor or the first discharge pipe is high or low.

More preferably, it further includes an inverter that converts the power of the power storage device from direct current to alternating current, and a power supply changeover switch that switches the power supply to the electric heating device between the power storage device and a commercial power source that supplements the power from the power storage device. The electric heating device heats at least one of the first passage and the first catalyst by inductive heating.

By heating the dehydrogenation reactor by induction heating, it is possible to raise the temperature in the vicinity of the catalyst to a predetermined temperature (first temperature threshold) in a short time as compared with other electric heating methods.

The method for controlling the power generation system according to the present invention includes a hydrogenation reactor including a first passage provided with a first catalyst for promoting the hydrogenation reaction of the aromatic compound, and extends from the first passage to the outside of the hydrogenation reactor. An electric heating device that heats at least one of a first passage and a first catalyst in a hydrogenation system having a first discharge pipe, and a heat exchange unit that cools at least one of the first passage, the first catalyst, and the first discharge pipe. , A method of controlling a power generation system having a generator that generates electricity using the heat obtained in the heat exchange unit and a power storage device that stores the power obtained by the generator, in the inside of the first passage. In order to activate the hydrogenation reaction, the pump of the heat medium circulation path is controlled so that the flow rate of the heat medium flowing in the heat medium circulation path including the heat exchange unit per unit time is equal to or less than the first flow rate, and the power storage device. The heat medium flowing in the heat medium circulation path after the first step in which the electric heating device is driven based on the electric power from the power generator and the charging in the power storage device is stopped and the hydrogenation reaction inside the first passage is activated. In the second step, the pump of the heat medium circulation path is controlled so that the flow rate per unit time is higher than the first flow rate, the electric heating device is stopped, and the power storage device is charged. To prepare for.

The power generation system according to the present invention includes a dehydrogenator including a second passage provided with a second catalyst for promoting the dehydrogenation reaction of the organic hydride, and a gas-liquid separator extending from the second passage to the outside of the dehydrogenator. Obtained in an electric heating device for heating at least one of a second passage and a second catalyst, a heat exchange section for cooling the second discharge tube, and a heat exchange section in a dehydrogenation system having a second discharge pipe connected to the second discharge pipe. It includes a generator that uses heat to generate electricity and a power storage device that stores the power obtained by the generator, and the electric heating device is driven at least based on the power from the power storage device.

The heat of the second discharge pipe, which has become hot due to the dehydrogenation reaction, is converted into electrical energy by a generator.
Such electric energy is stored in the power storage device and then used to heat the electric heating device.
Therefore, the heat generated by the dehydrogenation reaction can be effectively utilized. In particular, cooling of the second discharge pipe and power generation can be realized at the same time, and the dehydrogenation reaction can be executed without using external energy as much as possible.

Further, as a heater for heating the dehydrogenation reactor, an electric heating device driven by electricity is used.
Therefore, as a heater for heating the dehydrogenation reactor, it is possible to reduce the generation of exhaust gas due to combustion as compared with the form of burning organic hydride or aromatic compound.

Preferably, during the first mode of warming the second catalyst to activate the dehydrogenation reaction inside the second passage, the flow rate of the heat medium flowing through the heat medium circulation path including the heat exchange unit is the flow rate per unit time. The pump of the heat medium circulation path is controlled so as to be more than 0 and less than the first flow rate, the electric heating device is driven, the charging in the power storage device is stopped, and the dehydrogenation reaction inside the second passage is performed. During the second mode after activation, the pump of the heat medium circulation path is controlled so that the flow rate of the heat medium flowing through the heat medium circulation path per unit time becomes a second flow rate higher than the first flow rate. Moreover, charging is performed in the power storage device.

In the first mode, the power storage device is used to supply electric power to the electric heating device without charging.
In the second mode, the power storage device is used to charge the electric power generated by the generator without discharging.
Since the discharge and the charge are performed separately in terms of time, the burden on the power storage device can be reduced and the deterioration of the power storage device can be prevented as compared with the form in which the discharge and the charge are performed in the same time zone.

By maintaining the state in which the heat medium flows in the heat medium circulation path and the state in which the working medium flows in the working medium circulation path, it is difficult for the heat medium and the working medium to solidify or stay in the circulation path. I can.

Also, preferably, during the first mode of warming the second catalyst in order to activate the dehydrogenation reaction inside the second passage, the flow of the heat medium in the heat medium circulation path including the heat exchange section is stopped. During the second mode after the pump of the heat medium circulation path is controlled, the electric heating device is driven, the charging in the power storage device is stopped, and the dehydrogenation reaction inside the second passage is activated. The pump of the heat medium circulation path is controlled so that the heat medium flows in the heat medium circulation path, and charging is performed in the power storage device.

In the first mode, the power storage device is used to supply electric power to the electric heating device without charging.
In the second mode, the power storage device is used to charge the electric power generated by the generator without discharging.
Since the discharge and the charge are performed separately in terms of time, the burden on the power storage device can be reduced and the deterioration of the power storage device can be prevented as compared with the form in which the discharge and the charge are performed in the same time zone.

More preferably, the generator is connected to an expander provided in the working medium circulation path, and the heat medium flowing through the heat medium circulation path via the evaporator provided in the working medium circulation path is a heat medium. Heat exchange is performed with the working medium flowing through the working medium tree trunk path, and the boiling point of the working medium is lower than the boiling point of the heat medium.

Since the heat of the second discharge pipe having a large temperature change is indirectly transferred to the working medium circulation path, the heat of the second discharge pipe is compared with the form of directly transferring the heat of the second discharge pipe to the working medium circulation path. It is possible to continue stable power generation regardless of whether the temperature is high or low.

More preferably, it further includes an inverter that converts the power of the power storage device from direct current to alternating current, and a power supply changeover switch that switches the power supply to the electric heating device between the power storage device and a commercial power source that supplements the power from the power storage device. The electric heating device heats at least one of the second passage and the second catalyst by inductive heating.

By heating the dehydrogenation reactor by induction heating, it is possible to raise the temperature in the vicinity of the catalyst to a predetermined temperature in a short time as compared with other electric heating methods.

The method for controlling the power generation system according to the present invention includes a dehydrogenator including a second passage provided with a second catalyst for promoting the dehydrogenation reaction of the organic hydride, and an air extension from the second passage to the outside of the dehydrogenator. In a dehydrogenation system having a second discharge pipe connected to a liquid separator, an electric heating device that heats at least one of the second passage and the second catalyst, a heat exchange unit that cools the second discharge pipe, and a heat exchange unit. It is a control method of a power generation system having a power generator that generates power using the obtained heat and a power storage device that stores the power obtained by the power generator, and activates the dehydrogenation reaction inside the second passage. The pump of the heat medium circulation path is controlled so that the flow rate of the heat medium flowing through the heat medium circulation path including the heat exchange unit is equal to or less than the first flow rate, and is based on the electric power from the power storage device. The third step in which the electric heating device is driven and the charging in the power storage device is stopped, and after the dehydrogenation reaction inside the second passage is activated, the heat medium flowing in the heat medium circulation path per unit time. It includes a fourth step in which the pump of the heat medium circulation path is controlled so that the flow rate becomes a second flow rate higher than the first flow rate, the electric heating device is stopped, and the power storage device is charged.

As described above, according to the present invention, it is possible to provide a power generation system capable of effectively utilizing the heat generated by the dehydrogenation reaction or the hydrogenation reaction.

It is a schematic diagram which shows the structure of the hydrogenation system including the power generation system which used the electric heating apparatus of AC drive in 1st Embodiment, and also used the heat medium circulation path. It is a flowchart which shows the control procedure of each part at the time of executing the 1st mode and the 2nd mode in 1st Embodiment and 2nd Embodiment. It is a schematic diagram which shows the structure of the hydrogenation system including the power generation system which used the electric heating apparatus of DC drive in 1st Embodiment, and also used the heat medium circulation path. It is a schematic diagram which shows the structure of the hydrogenation system including the power generation system which used the electric heating apparatus of AC drive in 1st Embodiment, and omitted the heat medium circulation path. It is a schematic diagram which shows the structure of the hydrogenation system including the power generation system which used the electric heating apparatus of DC drive in 1st Embodiment, which used the heat medium circulation path, and also used the heat transfer apparatus. It is a schematic diagram which shows the structure of the dehydrogenation system including the power generation system which used the electric heating apparatus of AC drive in 2nd Embodiment, and also used the heat medium circulation path. It is a schematic diagram which shows the structure of the dehydrogenation system including the power generation system which used the electric heating apparatus of DC drive in 2nd Embodiment, and also used the heat medium circulation path. It is a schematic diagram which shows the structure of the dehydrogenation system including the power generation system which used the electric heating apparatus of AC drive in 2nd Embodiment, and omitted the heat medium circulation path.

Hereinafter, the first embodiment (the power generation system 2 provided in the hydrogenation system 1) will be described with reference to the drawings (see FIG. 1).
The hydrogenation system 1 in the first embodiment includes a first tank 11, a hydrogenation reactor 13, a first discharge pipe 14, an electric heating device 15, a first hydrogen tank 19, a second tank 21, a heat medium circulation path 31, and the like. Heat medium circulation path pump 33, heat exchange section 35, evaporator 37, working medium circulation path 41, working medium circulation path pump 43, expander 45, generator 46, power storage device 47, power supply changeover switch 48, condenser 49, A control unit 51 is provided.

The power generation system 2 in the hydrogen addition system 1 includes an electric heating device 15, a heat medium circulation path 31, a heat medium circulation path pump 33, a heat exchange unit 35, an evaporator 37, an operating medium circulation path 41, an operating medium circulation path pump 43, and the like. It includes an expander 45, a generator 46, a power storage device 47, a power supply changeover switch 48, a condenser 49, and a control unit 51.

The first tank 11 stores an aromatic compound such as toluene.
A first actuator 11a is provided at the opening in the first tank 11.
The first actuator 11a adjusts the opening degree of the opening in the first tank 11 under the control of the control unit 51.
By the operation of the first actuator 11a, the flow rate of the aromatic compound supplied from the first tank 11 to the hydrogenation reactor 13 is adjusted.

The hydrogenation reactor 13 causes the hydrogenation reaction of the aromatic compound supplied from the first tank 11. Specifically, hydrogen is added to an aromatic compound to produce an organic hydride such as methylcyclohexane.
A first catalyst 13b and a first temperature sensor 13c are provided in the first passage 13a through which aromatic compounds and hydrogen pass in the hydrogenation reactor 13.
The first catalyst 13b is composed of platinum or the like and is used to accelerate the hydrogenation reaction.
The first temperature sensor 13c is used to detect the temperature Te in the first passage 13a, particularly in the vicinity of the first catalyst 13b, as information regarding the temperature of at least one of the first passage 13a and the first catalyst 13b.
The hydrogenation reactor 13 is provided with an electric heating device 15 and a heat exchange unit 35.
The details of the heat exchange unit 35 will be described later.

The first discharge pipe 14 is provided between the hydrogenation reactor 13 and the second tank 21.
The organic hydride or the like discharged from the hydrogenation reactor 13 is supplied to the second tank 21 via the first discharge pipe 14.

The electric heating device 15 heats at least one of the first catalyst 13b and the first passage 13a.
The electric heating device 15 is composed of a coil and a metal provided near the coil, and the metal generates heat by induction heating.
The metal referred to here may form a part of the electric heating device 15 or may form a part of the hydrogenation reactor 13.

By heating the hydrogenation reactor 13 by induction heating, the temperature Te in the vicinity of the first catalyst 13b can be raised to a predetermined temperature (first temperature threshold Te1) or higher in a short time as compared with other electric heating methods. It will be possible.

However, the electric heating device 15 is not limited to the one by induction heating, and may be another heater such as resistance heating.

The electric heating device 15 is driven based on the electric power from the power storage device 47.
However, when the electric power stored in the electric power storage device 47 is not sufficient, the electric heating device 15 is driven based on the electric power from the commercial power source that supplements the electric power from the electric power storage device 47.

The first hydrogen tank 19 stores hydrogen to be supplied to the hydrogenation reactor 13.
A second actuator 19a is provided at the opening in the first hydrogen tank 19.
The second actuator 19a adjusts the opening degree of the opening in the first hydrogen tank 19 under the control of the control unit 51.
By the operation of the second actuator 19a, the flow rate of hydrogen supplied from the first hydrogen tank 19 to the hydrogenation reactor 13 is adjusted.

The second tank 21 stores the organic hydride obtained by the hydrogenation reaction in the hydrogenation reactor 13 and the aromatic compound that could not be completely hydrogenated.

The inside of the tube forming the heat medium circulation path 31 is filled with a heat medium (for example, water) for heating the working medium of the working medium circulation path 41.
The heat medium circulates in the heat medium circulation path 31 via the heat medium circulation path pump 33.
The heat medium circulation path pump 33 is driven based on the electric power from the commercial power source. However, the heat medium circulation path pump 33 may be driven based on the electric power from the power storage device 47.

The heat medium circulation path 31 is provided with a portion (heat exchange section 35) in contact with at least one of the hydrogenation reactor 13 (first passage 13a, first catalyst 13b) and the first discharge pipe 14.
The heat medium passing through the heat medium circulation path 31 takes heat from at least one of the hydrogenation reactor 13 and the first discharge pipe 14 by passing through the heat exchange unit 35, whereby the heat medium is heated.

Further, an evaporator 37 is provided in the heat medium circulation path 31.

The inside of the tube forming the working medium circulation path 41 is filled with a low boiling point medium such as pentane or ammonia as a working medium.
The boiling point of the working medium flowing through the working medium circulation path 41 is lower than the boiling point of the heat medium flowing through the heat medium circulation path 31.
The working medium circulates in the working medium circulation path 41 via the working medium circulation path pump 43.
The working medium circulation pump 43 is driven based on the electric power from the commercial power source. However, the working medium circulation path pump 43 may be driven based on the electric power from the power storage device 47.

The working medium circulation path 41 is provided with an evaporator 37, an expander 45, and a condenser 49.

The evaporator 37 functions as a heat exchange device, and the heat medium of the heat medium circulation path 31 heats and evaporates the working medium of the working medium circulation path 41.

The expander 45 including the turbine and the like is arranged downstream of the evaporator 37 in the working medium circulation path 41.
The expander 45 extracts kinetic energy from the working medium, such as rotating a turbine by expanding the working medium vaporized by the evaporator 37.
The generator 46 is driven by the expander 45.
Specifically, a generator 46 is connected to the drive shaft 45a of the expander 45, and the generator 46 generates electricity by rotating the drive shaft 45a based on the kinetic energy.
The electric power obtained by the generator 46 is converted from alternating current to direct current by the first converter 47a, and then stored in the power storage device 47.

The electric power stored in the power storage device 47 is converted from direct current to alternating current via the inverter 47b, and is supplied to the electric heating device 15 via the power supply changeover switch 48.

The power supply changeover switch 48 is a switch for switching the power supply source to the electric heating device 15 between the power storage device 47 and the commercial power source, and is controlled by the control unit 51.

The condenser 49 is arranged downstream of the expander 45 in the working medium circulation path 41 to condense the working medium.
For example, the condenser 49 functions as a heat exchange device, and the working medium of the working medium circulation path 41 is cooled by the refrigerant of the refrigerant circulation path (not shown).
The working medium liquefied by cooling returns to the evaporator 37 and is heated again.

The control unit 51 includes each part of the hydrogenation system 1 (first actuator 11a, electric heating device 15, second actuator 19a, heat medium circulation path pump 33, working medium circulation path pump 43, generator 46, power storage device 47, power supply). The changeover switch 48, etc.) is controlled.

From the time the hydrogenation system 1 is operated until the hydrogenation reaction in the hydrogenation reactor 13 becomes activating, that is, until the temperature Te near the first catalyst 13b exceeds the first temperature threshold Te1. During the period, assuming that the hydrogenation system 1 is in the first mode, the control unit 51 controls each unit so that the temperature Te in the vicinity of the first catalyst 13b is higher than the first temperature threshold Te1 (first step). , Steps S11 to S15 in FIG. 2).

After the hydrogenation reaction in the hydrogenation reactor 13 becomes activating, that is, after the temperature Te in the vicinity of the first catalyst 13b exceeds the first temperature threshold value Te1, the hydrogenation system 1 is second. As a mode, the control unit 51 controls each unit so that the temperature Te in the vicinity of the first catalyst 13b can be maintained close to the second temperature threshold value Te2 (second step, steps S16 to S18 in FIG. 2). ).

The first temperature threshold value Te1 is set to a temperature required for the hydrogenation reaction in the hydrogenation reactor 13 to be in an activateable state (for example, Te1 = 150 ° C.).
The second temperature threshold value Te2 is set to a temperature required for maintaining the activated state of the hydrogenation reaction after the hydrogenation reaction is activated (Te1> Te2).
However, the second temperature threshold value Te2 may be the same as the first temperature threshold value Te1.

The control procedure of each part when executing the first mode and the second mode in the first embodiment will be described with reference to the flowchart of FIG.
The control of each part is executed from the operation of operating the hydrogenation system 1 by the user to the operation of stopping the operation.

When the user performs an operation to operate the hydrogenation system 1, the control unit 51 determines in step S11 whether or not the power storage device 47 can drive the electric heating device 15 during the first period T1. To judge.
In the first period T1, the time required for heating with the electric heating device 15 from a state in which the first catalyst 13b is sufficiently cooled to a temperature at which the hydrogenation reaction can be activated is set.

When the electric power storage device 47 is sufficiently charged and the electric power storage device 47 can drive the electric heating device 15 during the first period T1, the control unit 51 changes from the power storage device 47 to the electric heating device 15 in step S12. The power changeover switch 48 is controlled so that power is supplied.

If the power storage device 47 is not in a state where the electric heating device 15 can be driven during the first period T1 such that the electric power stored in the power storage device 47 is not sufficient, the control unit 51 electrically heats the electric power source from the commercial power source in step S13. The power changeover switch 48 is controlled so that power is supplied to the device 15.

In the first embodiment, a mode is described in which a power storage device drive or a commercial power supply drive is determined immediately after the start of operation, and then the power supply is not switched. However, the control unit 51 and the power storage device 47 electrically heat the power storage device 47 even during operation. When it is determined whether or not the device 15 can be driven and the power storage device 47 is not in a state where the electric heating device 15 can be driven, the control unit 51 is powered so as to change from the power storage device drive to the commercial power supply drive. It may be in the form of controlling the changeover switch 48.

In step S14, the control unit 51 drives the first actuator 11a so as to close the opening of the first tank 11, and drives the second actuator 19a so as to close the opening of the first hydrogen tank 19. The pump 33 and the actuator circulation path pump 43 are turned off, the electric heating device 15 is driven by the power storage device 47 or a commercial power source, and charging from the generator 46 to the power storage device 47 is stopped.

In step S15, the control unit 51 determines whether or not the temperature Te in the vicinity of the first catalyst 13b is higher than the first temperature threshold value Te1.
If the temperature Te in the vicinity of the first catalyst 13b is higher than the first temperature threshold value Te1, the process proceeds to step S16.
If the temperature Te in the vicinity of the first catalyst 13b is not higher than the first temperature threshold value Te1, the step S15 is repeated after a predetermined time (for example, 1 minute) has elapsed.

When the first catalyst 13b is sufficiently warmed up, the hydrogenation reaction in the first passage 13a becomes activating, and the mode is switched from the first mode to the second mode.
In step S16, the control unit 51 drives the first actuator 11a so that the opening of the first tank 11 opens, drives the second actuator 19a so that the opening of the first hydrogen tank 19 opens, and drives the heat medium circulation path. The pump 33 and the working medium circulation path pump 43 are turned on, the electric heating device 15 is stopped, and the power storage device 47 is charged from the generator 46.
As a result, the heat of at least one of the hydrogenation reactor 13 and the first discharge pipe 14 is transferred to the working medium circulation path 41 via the heat medium circulation path 31, and the generator 46 generates electricity based on the heat. do.

In step S17, the control unit 51 determines whether or not the power storage device 47 is in a sufficiently charged state.
The fully charged state here is not only when the power storage device 47 is in a fully charged state or about 80% to 90% of the fully charged state, but also when the hydrogenation system 1 is stopped and the first The catalyst 13b may be in a state in which electric power is stored enough to drive the electric heating device 15 in order to heat the catalyst 13b from a sufficiently cooled state to the first temperature threshold value Te1.

When the power storage device 47 is in a sufficiently charged state, the control unit 51 turns off the generator 46 or stops the power supply (charging) from the generator 46 to the power storage device 47 in step S18. Let me.
If the power storage device 47 is not sufficiently charged, step S17 is repeated after a predetermined time (for example, 1 minute) has elapsed.

During the second mode, the hydrogenation reactor 13 and the first discharge pipe 14 are cooled even when the generator 46 is turned off or the power supply from the generator 46 to the power storage device 47 is stopped. In order to continue, the control unit 51 keeps operating the heat medium circulation path pump 33 and keeps circulating the heat medium in the heat medium circulation path 31.

Further, the control unit 51 controls the flow rate of the heat medium circulation path 31 so that the temperature Te in the vicinity of the first catalyst 13b is maintained at the second temperature threshold value Te2, that is, the output of the heat medium circulation path pump 33. To control.
Specifically, when the temperature Te in the vicinity of the first catalyst 13b becomes higher than the second temperature threshold value Te2, the control unit 51 increases the output of the heat medium circulation path pump 33.
Further, when the temperature Te in the vicinity of the first catalyst 13b becomes lower than the second temperature threshold value Te2, the control unit 51 lowers the output of the heat medium circulation path pump 33.

Further, in order to prevent the temperature Te in the vicinity of the first catalyst 13b from becoming lower than the second temperature threshold value Te2 even after the hydrogenation reaction becomes active and the mode is switched from the first mode to the second mode. , The control unit 51 may perform drive control of the electric heating device 15 instead of (or in addition to) the control of the heat medium circulation path pump 33.
Specifically, when the temperature Te in the vicinity of the first catalyst 13b becomes lower than the second temperature threshold value Te2, the control unit 51 drives the electric heating device 15.
When the temperature Te in the vicinity of the first catalyst 13b becomes higher than the second temperature threshold value Te2, the control unit 51 stops the electric heating device 15.
In the second mode, it is desirable that the electric heating device 15 is driven by a commercial power source while the power storage device 47 is being charged.

The control unit 51 controls the flow rate of the heat medium circulation path 31 so that the temperature Te in the vicinity of the first catalyst 13b is maintained in a lowered state up to the second temperature threshold value Te2 lower than the first temperature threshold value Te1. Therefore, the amount of heat obtained by the heat exchange unit 35 is larger than that in the form in which the temperature Te in the vicinity of the first catalyst 13b is maintained at the first temperature threshold value Te1, and it is possible to increase the amount of power generation. ..

In the hydrogenation reactor 13, when the hydrogenation reaction is activated, the temperature of the first passage 13a and the like rises sharply due to the hydrogenation reaction. However, in order to maintain the activated state of the hydrogenation reaction, it is not necessary to raise the temperature of the first passage 13a or the like significantly higher than the first temperature threshold value Te1.
In the first embodiment, the heat generated after the hydrogenation reaction is activated is transferred to the working medium circulation path 41, converted into rotational force by the expander 45, and converted into electrical energy by the generator 46. do.
Such electric energy is stored in the power storage device 47 and then used to heat the electric heating device 15.
Therefore, the heat generated by the hydrogenation reaction can be effectively utilized. In particular, cooling of the hydrogenation reactor 13 and the first discharge pipe 14 and power generation can be realized at the same time, and the hydrogenation reaction can be executed without using external energy as much as possible.

In the first mode, the power storage device 47 is used to supply electric power to the electric heating device 15 without charging.
In the second mode, the power storage device 47 is used to charge the electric power generated by the generator 46 without discharging.
Since the discharge and the charge are performed separately in terms of time, the burden on the power storage device 47 can be reduced and the deterioration of the power storage device 47 can be prevented as compared with the form in which the discharge and the charge are performed in the same time zone. ..

The control unit 51 may be in a form in which the heat medium circulation path pump 33 and the working medium circulation path pump 43 are turned off, but the heat medium circulation path pump 33 and the working medium circulation path pump 43 have a weak output. It may be in the form of maintaining the operation.
For example, in step S14 of the first mode, the control unit 51 circulates the heat medium so that the flow rate of the heat medium per unit time and the flow rate of the working medium per unit time are more than 0 and equal to or less than the first flow rate. It controls the path pump 33 and the working medium circulation path pump 43.
Further, in step S16 of the second mode, the control unit 51 circulates the heat medium so that the flow rate of the heat medium per unit time and the flow rate of the working medium per unit time become the second flow rate higher than the first flow rate. It controls the path pump 33 and the working medium circulation path pump 43.

By maintaining the state in which the heat medium flows through the heat medium circulation path 31 and the state in which the working medium flows through the working medium circulation path 41, the heat medium and the working medium can be solidified or retained in the circulation path. It can be difficult to do.

Further, as shown in step 15, the determination of switching from the first mode to the second mode is made based on the temperature information. Therefore, as soon as the hydrogenation reaction becomes activating, it becomes possible to supply the aromatic compound or hydrogen to the hydrogenation reactor 13.

However, the determination of switching from the first mode to the second mode may be performed based on other information.
For example, the control unit 51 controls each unit during the first period T1 after the hydrogenation reactor 13 is operated, assuming that the mode is the first mode, and after the first period T1 elapses, the second mode is used. If there is, it is conceivable that the control unit 51 controls each unit.

Further, in the first embodiment, it has been described that the electric heating device 15 is driven by alternating current, such as an induction heating type heater, but the electric heating device 15 is a resistance heating type heater, etc., by direct current. It may be driven.
In this case, the inverter 47b between the power storage device 47 and the power supply changeover switch 48 is omitted, and a second converter 52 is provided between the commercial power supply and the power supply changeover switch 48 (see FIG. 3).

Further, in the first embodiment, the heat of the hydrogenation reactor 13 and the first discharge pipe 14 is indirectly transferred to the working medium of the working medium circulation path 41 through the heat medium of the heat medium circulation path 31. The form was explained.
Since the heat of the hydrogenation reactor 13 and the first discharge pipe 14 having a large temperature change is indirectly transferred to the working medium circulation path 41, the heat of the hydrogenation reactor 13 and the first discharge pipe 14 is directly transferred to the working medium. Compared with the form of transmitting to the circulation passage 41, it becomes possible to continue stable power generation regardless of whether the temperature of the hydrogenation reactor 13 or the first discharge pipe 14 is high or low.

However, in order to simplify the system, the heat medium circulation path 31 is omitted, and the heat of the hydrogenation reactor 13 and the first discharge pipe 14 is directly transferred to the working medium of the working medium circulation path 41. It may be in a transmitted form (see FIG. 4).
In this case, the working medium circulation path 41 is provided with a portion (evaporator 37) in contact with at least one of the hydrogenation reactor 13 and the first discharge pipe 14 as corresponding to the heat exchange unit 35.
The working medium passing through the working medium circulation path 41 is heated and evaporated by passing through the evaporator 37.

Further, in the first embodiment, an electric heating device 15 driven by electricity is used as a heater for heating the hydrogenation reactor 13.
Therefore, as a heater for heating the hydrogenation reactor 13, it is possible to reduce the generation of exhaust gas due to combustion as compared with the form of burning an organic hydride or an aromatic compound.

Further, in order to continue the hydrogenation reaction, it is necessary to maintain the temperature Te in the vicinity of the first catalyst 13b at a predetermined temperature (second temperature threshold value Te2) or higher.
Therefore, when the heat medium circulation path 31 is in contact with the hydrogenation reactor 13, the heat exchange unit 35 of the heat medium circulation path 31 is not in direct contact with the first passage 13a of the hydrogenation reactor 13. When necessary, the heat transfer device (for example, Peltier element) 31a that transfers the heat of the hydrogenation reactor 13 to the heat exchange unit 35 of the heat medium circulation path 31 by electrical control is the heat medium circulation path 31. It is desirable that the heat exchange unit 35 be provided between the first passage 13a of the hydrogenation reactor 13 (see FIG. 5).
In this case, the control unit 51 controls the on / off state of the heat transfer device 31a based on the information from the first temperature sensor 13c.

Specifically, when the temperature Te in the vicinity of the first catalyst 13b is equal to or higher than the second temperature threshold Te2, the heat transfer device 31a is turned on, and the hydrogenation reactor 13 is turned on via the heat transfer device 31a. The heat is transferred to the heat medium circulation path 31.
When the temperature Te in the vicinity of the first catalyst 13b is less than the second temperature threshold Te2, the heat transfer device 31a is turned off, and the heat medium circulation of the hydrogenation reactor 13 is performed via the heat transfer device 31a. The movement to the road 31 is not performed.

Even in this case, the first discharge pipe 14 and the heat exchange unit 35 of the heat medium circulation path 31 may be in direct contact with each other without the heat transfer device 31a.

Further, in the first embodiment, a mode in which power generation is performed using one heat cycle (working medium circulation path 41) or two heat cycles (heat medium circulation path 31 and working medium circulation path 41) has been described. It may be in the form of directly generating power based on the heat obtained by the switching unit 35.
For example, one contact surface of a thermoelectric conversion element such as a Peltier element is brought into contact with the hydrogenation reactor 13 or the first discharge pipe 14, and the other contact surface is brought into contact with the outside air or a cooling device such as a heat sink. It is conceivable that power is generated based on the temperature difference between one contact surface and the other contact surface.
In this case, the thermoelectric conversion element also serves as both the heat exchange unit 35 and the generator 46.

Next, the second embodiment (the power generation system 20 provided in the dehydrogenation system 10) will be described.
The dehydrogenation system 10 in the second embodiment includes a tenth tank 110, a dehydrogenation reactor 130, an electric heating device 150, a gas-liquid separator 170, a tenth hydrogen tank 190, a twentieth tank 210, and a heat medium circulation path 310. Heat medium circulation path pump 330, heat exchange unit 350, evaporator 370, working medium circulation path 410, working medium circulation path pump 430, expander 450, generator 460, power storage device 470, power supply changeover switch 480, condenser 490, A control unit 510 is provided (see FIG. 6).

The power generation system 20 in the dehydrogenation system 10 includes an electric heating device 150, a heat medium circulation path 310, a heat medium circulation path pump 330, a heat exchange unit 350, an evaporator 370, a working medium circulation path 410, and a working medium circulation path pump 430. It includes an expander 450, a generator 460, a power storage device 470, a power supply changeover switch 480, a condenser 490, and a control unit 510.

The tenth tank 110 stores organic hydride such as methylcyclohexane.
A tenth actuator 110a is provided at the opening in the tenth tank 110.
The tenth actuator 110a adjusts the opening degree of the opening in the tenth tank 110 under the control of the control unit 510.
The operation of the tenth actuator 110a adjusts the flow rate of the organic hydride supplied from the tenth tank 110 to the dehydrogenation reactor 130.

The dehydrogenation reactor 130 causes a dehydrogenation reaction on the organic hydride supplied from the tenth tank 110.
A second catalyst 130b and a second temperature sensor 130c are provided in the second passage 130a through which the organic hydride passes in the dehydrogenation reactor 130.
The second catalyst 130b is used to accelerate the dehydrogenation reaction.
The second temperature sensor 130c is used to detect the temperature Te in the second passage 130a, particularly in the vicinity of the second catalyst 130b, as information regarding the temperature of at least one of the second passage 130a and the second catalyst 130b.
The dehydrogenation reactor 130 is provided with an electric heating device 150 and a heat exchange unit 350.
The details of the heat exchange unit 350 will be described later.

The electric heating device 150 heats at least one of the second catalyst 130b and the second passage 130a.
The electric heating device 150 is composed of a coil and a metal provided near the coil, and the metal generates heat by induction heating.
The metal referred to here may form a part of the electric heating device 150 or may form a part of the dehydrogenation reactor 130.

By heating the dehydrogenation reactor 130 by induction heating, it is possible to raise the temperature Te in the vicinity of the second catalyst 130b to a predetermined temperature (third temperature threshold Te3) in a short time as compared with other electric heating methods. become.

However, the electric heating device 150 is not limited to the one by induction heating, and may be another heater such as resistance heating.

The electric heating device 150 is driven based on the electric power from the power storage device 470.
However, if the power stored in the power storage device 470 is not sufficient, the electric heating device 150 is driven based on the power from a commercial power source that supplements the power from the power storage device 470.

The gas-liquid separator 170 separates the gas (hydrogen) discharged from the dehydrogenation reactor 130 and the liquid (aromatic compounds such as toluene and organic hydride) using activated charcoal, a polymer film, or the like, and the gas (gas). Hydrogen) is discharged to the 10th hydrogen tank 190, and the liquid (aromatic compound or organic hydride) is discharged to the 20th tank 210.
The tenth hydrogen tank 190 stores hydrogen obtained by the dehydrogenation reaction in the dehydrogenation reactor 130.
The 20th tank 210 stores the aromatic compound obtained by the dehydrogenation reaction in the dehydrogenation reactor 130 and the organic hydride that could not be completely dehydrogenated.

The inside of the tube forming the heat medium circulation path 310 is filled with a heat medium (for example, water) for heating the working medium of the working medium circulation path 410.
The heat medium circulates in the heat medium circulation path 310 via the heat medium circulation path pump 330.
The heat medium circulation path pump 330 is driven based on the electric power from the commercial power source. However, the heat medium circulation path pump 330 may be driven based on the electric power from the power storage device 470.

The heat medium circulation path 310 is provided with a portion (heat exchange unit 350) in contact with the second discharge pipe 140.
The heat medium passing through the heat medium circulation path 310 takes heat from the second discharge pipe 140 by passing through the heat exchange unit 350, whereby the heat medium is heated.

Further, an evaporator 370 is provided in the heat medium circulation path 310.

The inside of the tube forming the working medium circulation path 410 is filled with a low boiling point medium such as pentane or ammonia as a working medium.
The boiling point of the working medium flowing through the working medium circulation path 410 is lower than the boiling point of the heat medium flowing through the heat medium circulation path 310.
The working medium circulates in the working medium circulation path 410 via the working medium circulation path pump 430.
The working medium circulation pump 430 is driven based on the electric power from the commercial power source. However, the working medium circulation path pump 430 may be driven based on the electric power from the power storage device 470.

The working medium circulation path 410 is provided with an evaporator 370, an expander 450, and a condenser 490.

The evaporator 370 functions as a heat exchange device, and the heat medium of the heat medium circulation path 310 heats and evaporates the working medium of the working medium circulation path 410.

The expander 450 including the turbine and the like is arranged downstream of the evaporator 370 in the working medium circulation path 410.
The expander 450 extracts kinetic energy from the working medium, such as rotating a turbine by expanding the working medium vaporized by the evaporator 370.
The inflator 450 drives the generator 460.
Specifically, a generator 460 is connected to the drive shaft 450a of the expander 450, and the generator 460 generates electricity by rotating the drive shaft 450a based on the kinetic energy.
The electric power obtained by the generator 460 is converted from alternating current to direct current by the first converter 470a, and then stored in the power storage device 470.

The electric power stored in the power storage device 470 is converted from direct current to alternating current via the inverter 470b, and is supplied to the electric heating device 150 via the power supply changeover switch 480.

The power supply changeover switch 480 is a switch for switching the power supply source to the electric heating device 150 between the power storage device 470 and the commercial power supply, and is controlled by the control unit 510.

The condenser 490 is located downstream of the expander 450 in the working medium circulation path 410 to condense the working medium.
For example, the condenser 490 functions as a heat exchange device, and the working medium of the working medium circulation path 410 is cooled by the refrigerant of the refrigerant circulation path (not shown).
The working medium liquefied by cooling returns to the evaporator 370 and is heated again.

The control unit 510 is each part of the dehydrogenation system 10 (10th actuator 110a, electric heating device 150, heat medium circulation path pump 330, working medium circulation path pump 430, generator 460, power storage device 470, power supply changeover switch 480, etc.). To control.

From the time the dehydrogenation system 10 is operated until the dehydrogenation reaction in the dehydrogenation reactor 130 becomes active, that is, until the temperature Te near the second catalyst 130b exceeds the third temperature threshold Te3. During the period, assuming that the dehydrogenation system 10 is in the first mode, the control unit 510 controls each unit so that the temperature Te in the vicinity of the second catalyst 130b is higher than the third temperature threshold Te3 (third step). , Steps S11 to S15 in FIG. 2).

After the dehydrogenation reaction in the dehydrogenation reactor 130 becomes activating, that is, after the temperature Te in the vicinity of the second catalyst 130b exceeds the third temperature threshold value Te3, the dehydrogenation system 10 is second. As a mode, the control unit 510 controls each unit so that the temperature Te in the vicinity of the second catalyst 130b can be maintained close to the fourth temperature threshold value Te4 (fourth step, steps S16 to S18 in FIG. 2). ).

The third temperature threshold value Te3 is set to a temperature required for the dehydrogenation reaction in the dehydrogenation reactor 130 to be in an activateable state (for example, Te3 = 220 ° C.).
The fourth temperature threshold value Te4 is set to a temperature required to maintain the activated state of the dehydrogenation reaction after the dehydrogenation reaction is activated (Te3> Te4).
However, the fourth temperature threshold value Te4 may be the same as the third temperature threshold value Te3.

The control procedure of each part when executing the first mode and the second mode in the second embodiment will be described with reference to the flowchart of FIG.
That is, the control procedure in the first embodiment and the control procedure in the second embodiment are substantially the same.
The control of each part is executed from the operation of operating the dehydrogenation system 10 by the user to the operation of stopping the operation.

When the user performs an operation to operate the dehydrogenation system 10, the control unit 510 determines in step S11 whether or not the power storage device 470 can drive the electric heating device 150 during the second period T2. To judge.
In the second period T2, the time required for heating the second catalyst 130b from a sufficiently cooled state to a temperature at which the dehydrogenation reaction can be activated by the electric heating device 150 is set.

When the electric power storage device 470 is sufficiently charged and the electric power storage device 470 can drive the electric heating device 150 during the second period T2, the control unit 510 changes from the power storage device 470 to the electric heating device 150 in step S12. The power changeover switch 480 is controlled so that power is supplied.

If the power storage device 470 is not in a state where the electric heating device 150 can be driven during the second period T2, such as when the electric power stored in the power storage device 470 is not sufficient, the control unit 510 electrically heats the electric heating device 150 from the commercial power source in step S13. The power changeover switch 480 is controlled so that power is supplied to the device 150.

In the second embodiment, a mode is described in which a power storage device drive or a commercial power supply drive is determined immediately after the start of operation, and then the power supply is not switched. When it is determined whether or not the device 150 can be driven and the power storage device 470 is not in a state where the electric heating device 150 can be driven, the control unit 510 is powered so as to change from the power storage device drive to the commercial power supply drive. It may be in the form of controlling the changeover switch 480.

In step S14, the control unit 510 drives the tenth actuator 110a so as to close the opening of the tenth tank 110, turns off the heat medium circulation path pump 330 and the working medium circulation path pump 430, and turns off the power storage device 470 or commercial. The electric heating device 150 is driven by the power source, and charging from the generator 460 to the power storage device 470 is stopped.

In step S15, the control unit 510 determines whether or not the temperature Te in the vicinity of the second catalyst 130b is higher than the third temperature threshold value Te3.
If the temperature Te in the vicinity of the second catalyst 130b is higher than the third temperature threshold value Te3, the process proceeds to step S16.
If the temperature Te in the vicinity of the second catalyst 130b is not higher than the third temperature threshold value Te3, step S15 is repeated after a predetermined time (for example, 1 minute) has elapsed.

When the second catalyst 130b is sufficiently warmed, the dehydrogenation reaction in the second passage 130a becomes activating, and the mode is switched from the first mode to the second mode.
In step S16, the control unit 510 drives the tenth actuator 110a so that the opening of the tenth tank 110 is opened, turns on the heat medium circulation path pump 330 and the working medium circulation path pump 430, and from the generator 460. The power storage device 470 is charged.
As a result, the heat of the second discharge pipe 140 is transferred to the working medium circulation path 410 via the heat medium circulation path 310, and the generator 460 generates electricity based on the heat.

In step S17, the control unit 510 determines whether or not the power storage device 470 is in a sufficiently charged state.
The fully charged state here is not only when the power storage device 470 is in a fully charged state or about 80% to 90% of the fully charged state, but also when the dehydrogenation system 10 is stopped and the second The catalyst 130b may be in a state in which electric power is stored enough to drive the electric heating device 150 in order to heat the catalyst 130b from a sufficiently cooled state to the third temperature threshold value Te3.

When the power storage device 470 is in a sufficiently charged state, the control unit 510 turns off the generator 460 or stops the power supply (charging) from the generator 460 to the power storage device 470 in step S18. Let me.
If the power storage device 470 is not fully charged, step S17 is repeated after a predetermined time (for example, 1 minute) has elapsed.

During the second mode, the control unit 510 is used to continue cooling the second discharge pipe 140 even when the generator 460 is turned off or the power supply from the generator 460 to the power storage device 470 is stopped. Continues to operate the heat medium circulation path pump 330 and keeps the heat medium circulated in the heat medium circulation path 310.

Further, the control unit 510 controls the drive of the electric heating device 150 so that the temperature Te in the vicinity of the second catalyst 130b is maintained at the fourth temperature threshold value Te4.
Specifically, when the temperature Te in the vicinity of the second catalyst 130b becomes lower than the fourth temperature threshold value Te4, the control unit 510 drives the electric heating device 150.
When the temperature Te in the vicinity of the second catalyst 130b becomes higher than the fourth temperature threshold value Te4, the control unit 510 stops the electric heating device 150.
In the second mode, it is desirable that the electric heating device 150 is driven by a commercial power source while the power storage device 470 is being charged.

In the dehydrogenation reactor 130, when the dehydrogenation reaction is activated, the temperature of the second discharge pipe 140 rises due to the dehydrogenation reaction. However, in order to separate the gas (hydrogen) discharged from the dehydrogenation reactor 130 and the liquid (aromatic compounds such as toluene and organic hydride) in the gas-liquid separator 170 in the subsequent stage, a mixture of gas and liquid is used. It is desirable to keep it cold.
In the second embodiment, the heat of the second discharge pipe 140, which has become hot due to the dehydrogenation reaction, is transferred to the working medium circulation passage 410, converted into rotational force by the expander 450, and converted into electrical energy by the generator 460. do.
Such electric energy is stored in the power storage device 470 and then used to heat the electric heating device 150.
Therefore, the heat generated by the dehydrogenation reaction can be effectively utilized. In particular, cooling of the second discharge pipe 140 and power generation can be realized at the same time, and the dehydrogenation reaction can be executed without using external energy as much as possible.

In the first mode, the power storage device 470 is used to supply electric power to the electric heating device 150 without charging.
In the second mode, the power storage device 470 is used to charge the electric power generated by the generator 460 without discharging.
Since discharging and charging are performed separately in terms of time, the burden on the power storage device 470 can be reduced and deterioration of the power storage device 470 can be prevented as compared with the form in which discharging and charging are performed in the same time zone. ..

The control unit 510 may be in a form in which the heat medium circulation path pump 330 and the working medium circulation path pump 430 are turned off, but the heat medium circulation path pump 330 and the working medium circulation path pump 430 have a weak output. It may be in the form of maintaining the operation.
For example, in step S14 of the first mode, the control unit 510 circulates the heat medium so that the flow rate of the heat medium per unit time and the flow rate of the working medium per unit time are more than 0 and equal to or less than the first flow rate. It controls the path pump 330 and the working medium circulation path pump 430.
Further, in step S16 of the second mode, the control unit 510 circulates the heat medium so that the flow rate per unit time of the heat medium and the flow rate per unit time of the working medium become the second flow rate higher than the first flow rate. It controls the path pump 330 and the working medium circulation path pump 430.

By maintaining the state in which the heat medium flows through the heat medium circulation path 310 and the state in which the working medium flows through the working medium circulation path 410, the heat medium and the working medium can be solidified or retained in the circulation path. It can be difficult to do.

Further, the determination of switching from the first mode to the second mode is made based on the temperature information. Therefore, as soon as the dehydrogenation reaction becomes activating, the organic hydride can be supplied to the dehydrogenation reactor 130.

However, the determination of switching from the first mode to the second mode may be performed based on other information.
For example, the control unit 510 controls each unit during the second period T2 after the dehydrogenation reactor 130 is operated, assuming that the mode is the first mode, and after the lapse of the second period T2, the second mode is used. If there is, it is conceivable that the control unit 510 controls each unit.

Further, in the second embodiment, it has been described that the electric heating device 150 is driven by alternating current, such as an induction heating type heater, but the electric heating device 150 is a resistance heating type heater, etc., by direct current. It may be driven.
In this case, the inverter 470b between the power storage device 470 and the power supply changeover switch 480 is omitted, and a second converter 520 is provided between the commercial power supply and the power supply changeover switch 480 (see FIG. 7).

Further, in the second embodiment, the mode in which the heat of the second discharge pipe 140 is indirectly transferred to the working medium of the working medium circulation path 410 through the heat medium of the heat medium circulation path 310 has been described.
Since the heat of the second discharge pipe 140 having a large temperature change is indirectly transferred to the working medium circulation passage 410, the heat of the second discharge pipe 140 is directly transferred to the working medium circulation passage 410. 2 It becomes possible to continue power generation stably regardless of whether the temperature of the discharge pipe 140 is high or low.

However, in order to give priority to simplifying the system, the heat medium circulation path 310 is omitted, and the heat of the second discharge pipe 140 is directly transferred to the working medium of the working medium circulation path 410. It may be (see FIG. 8).
In this case, the working medium circulation path 410 is provided with a portion (evaporator 370) in contact with the second discharge pipe 140 as corresponding to the heat exchange unit 350.
The working medium passing through the working medium circulation path 410 is heated and evaporated by passing through the evaporator 370.

Further, in the second embodiment, an electric heating device 150 driven by electricity is used as a heater for heating the dehydrogenation reactor 130.
Therefore, as a heater for heating the dehydrogenation reactor 130, it is possible to reduce the generation of exhaust gas due to combustion as compared with the form of burning an organic hydride or an aromatic compound.

Further, in the second embodiment, a mode in which power generation is performed using one heat cycle (working medium circulation path 410) or two heat cycles (heat medium circulation path 310 and working medium circulation path 410) has been described. It may be in the form of directly generating power based on the heat obtained by the switching unit 350.
For example, one contact surface of a thermoelectric conversion element such as a Peltier element is brought into contact with the dehydrogenation reactor 130 or the second discharge pipe 140, and the other contact surface is brought into contact with the outside air or a cooling device such as a heat sink. It is conceivable that power is generated based on the temperature difference between one contact surface and the other contact surface.
In this case, the thermoelectric conversion element serves as both the heat exchange unit 350 and the generator 460.

1 Hydrogenation system 2, 20 Power generation system 10 Dehydrogenation system 11 1st tank 11a 1st actuator 110 10th tank 110a 10th actuator 13 Hydrogenation reactor 130 Dehydrogenation reactor 13a 1st passage 130a 2nd passage 13b 1st Catalyst 130b 2nd catalyst 13c 1st temperature sensor 130c 2nd temperature sensor 14 1st discharge pipe 140 2nd discharge pipe 15,150 Electric heating device 170 Gas-liquid separator 19 1st hydrogen tank 19a 2nd actuator 190 10th hydrogen tank 21 2nd tank 210 20th tank 31,310 Heat transfer path 31a Heat transfer device 33, 330 Heat transfer path pump 35, 350 Heat exchange part 37, 370 Evaporator 41, 410 Actuator circulation path 43, 430 Actuator Circulation path pump 45, 450 Inflator 45a, 450a Drive shaft 46, 460 Generator 47, 470 Power storage device 47a, 470a First converter 47b, 470b Inverter 48, 480 Power changeover switch 49, 490 Condenser 51, 510 Control unit 52 520 2nd converter T1 1st period T2 2nd period The temperature near the Te catalyst Te1 1st temperature threshold Te2 2nd temperature threshold Te3 3rd temperature threshold Te4 4th temperature threshold

Claims (15)

Hydrogenation having a hydrogenation reactor including a first passage provided with a first catalyst for promoting a hydrogenation reaction of an aromatic compound, and a first discharge pipe extending from the first passage to the outside of the hydrogenation reactor. An electric heating device that heats at least one of the first passage and the first catalyst in the system.
A heat exchange unit that cools at least one of the first passage, the first catalyst, and the first discharge pipe.
A generator that generates electricity using the heat obtained in the heat exchange unit,
It is equipped with a power storage device that stores the electric power obtained by the generator.
The electric heating device is a power generation system driven by at least the electric power from the power storage device. Hydrogenation having a hydrogenation reactor including a first passage provided with a first catalyst for promoting a hydrogenation reaction of an aromatic compound, and a first discharge pipe extending from the first passage to the outside of the hydrogenation reactor. An electric heating device that heats at least one of the first passage and the first catalyst in the system.
A heat exchange unit that cools at least one of the first passage, the first catalyst, and the first discharge pipe.
A generator that generates electricity using the heat obtained in the heat exchange unit,
It is equipped with a power storage device that stores the electric power obtained by the generator.
The electric heating device is driven based on at least the electric power from the power storage device.
A heat transfer device that can be switched on and off based on an electric signal is provided between the first passage, at least one of the first catalysts, and the heat exchange unit.
When the heat transfer device is in either the on state or the off state, the heat of the hydrogenation reactor is transferred to the heat exchange unit via the heat transfer device.
A power generation system in which heat of the hydrogenation reactor is not transferred to the heat exchange unit via the heat transfer device when the heat transfer device is either on or off. The second aspect of the present invention, wherein the heat exchange unit is in contact with at least one of the first passage and the first catalyst via the heat transfer device and is connected to the discharge pipe without the heat transfer device. The power generation system described. Hydrogenation having a hydrogenation reactor including a first passage provided with a first catalyst for promoting a hydrogenation reaction of an aromatic compound, and a first discharge pipe extending from the first passage to the outside of the hydrogenation reactor. An electric heating device that heats at least one of the first passage and the first catalyst in the system.
A heat exchange unit that cools at least one of the first passage, the first catalyst, and the first discharge pipe.
A generator that generates electricity using the heat obtained in the heat exchange unit,
It is equipped with a power storage device that stores the electric power obtained by the generator.
The electric heating device is driven based on at least the electric power from the power storage device.
During the first mode of warming the first catalyst in order to activate the hydrogenation reaction inside the first passage, the flow rate of the heat medium flowing in the heat medium circulation path including the heat exchange unit is the flow rate per unit time. The pump of the heat medium circulation path is controlled so as to be greater than 0 and equal to or less than the first flow rate, the electric heating device is driven, and charging in the power storage device is stopped.
During the second mode after the hydrogenation reaction in the first passage is activated, the flow rate of the heat medium flowing through the heat medium circulation path per unit time is larger than the first flow rate. A power generation system in which the pump of the heat medium circulation path is controlled so as to be, the electric heating device is stopped, and charging is performed in the power storage device. Hydrogenation having a hydrogenation reactor including a first passage provided with a first catalyst for promoting a hydrogenation reaction of an aromatic compound, and a first discharge pipe extending from the first passage to the outside of the hydrogenation reactor. An electric heating device that heats at least one of the first passage and the first catalyst in the system.
A heat exchange unit that cools at least one of the first passage, the first catalyst, and the first discharge pipe.
A generator that generates electricity using the heat obtained in the heat exchange unit,
It is equipped with a power storage device that stores the electric power obtained by the generator.
The electric heating device is driven based on at least the electric power from the power storage device.
During the first mode of warming the first catalyst in order to activate the hydrogenation reaction inside the first passage, the flow of the heat medium in the heat medium circulation path including the heat exchange section is stopped. The pump of the heat medium circulation path is controlled, the electric heating device is driven, and charging in the power storage device is stopped.
During the second mode after the hydrogenation reaction in the first passage is activated, the pump of the heat medium circulation path is controlled so that the heat medium flows in the heat medium circulation path, and the electric heating is performed. A power generation system in which the device is stopped and charging is performed in the power storage device. The switching control from the first mode to the second mode is performed based on the information regarding the temperature of at least one of the first passage and the first catalyst.
When the temperature of at least one of the first passage and the second catalyst exceeds the first temperature threshold value, the switching from the first mode to the second mode is performed.
After switching to the second mode, the temperature of at least one of the first passage and the first catalyst is the same as the first temperature threshold or close to the second temperature threshold lower than the first temperature threshold. The power generation system according to claim 4 or 5, wherein the pump of the heat medium circulation path is controlled so as to be maintained. The generator is connected to an expander provided in the working medium circulation path.
The heat medium flowing through the heat medium circulation path undergoes heat exchange with the working medium flowing through the working medium trunk path via an evaporator provided in the working medium circulation path.
The power generation system according to any one of claims 4 to 5, wherein the boiling point of the working medium is lower than the boiling point of the heat medium. An inverter that converts the power of the power storage device from direct current to alternating current,
Further, it is provided with a power supply changeover switch for switching the power supply to the electric heating device between the power storage device and a commercial power source that supplements the power from the power storage device.
The power generation system according to any one of claims 1 to 7, wherein the electric heating device heats at least one of the first passage and the first catalyst by induction heating. Hydrogenation having a hydrogenation reactor including a first passage provided with a first catalyst for promoting a hydrogenation reaction of an aromatic compound, and a first discharge pipe extending from the first passage to the outside of the hydrogenation reactor. An electric heating device for heating at least one of the first passage and the first catalyst in the system, a heat exchange unit for cooling at least one of the first passage, the first catalyst, and the first discharge pipe, and the heat exchange. It is a control method of a power generation system having a generator that generates electricity using the heat obtained in the unit and a power storage device that stores the power obtained by the generator.
In order to activate the hydrogenation reaction inside the first passage, the heat medium circulation path is such that the flow rate of the heat medium flowing through the heat medium circulation path including the heat exchange unit per unit time is equal to or less than the first flow rate. In the first step, the pump is controlled and the electric heating device is driven based on the electric power from the power storage device, and charging in the power storage device is stopped.
After the hydrogenation reaction in the first passage is activated, the heat medium flows into the heat medium circulation path so that the flow rate of the heat medium per unit time becomes a second flow rate higher than the first flow rate. A control method comprising a second step in which a pump in a circulation path is controlled, the electric heating device is stopped, and charging is performed in the power storage device. A dehydrogenation reactor including a second passage provided with a second catalyst for promoting the dehydrogenation reaction of the organic hydride, and a second discharge extending from the second passage to the outside of the dehydrogenation reactor and connecting to the gas-liquid separator. An electric heating device for heating at least one of the second passage and the second catalyst in a dehydrogenation system having a tube.
A heat exchange unit that cools the second discharge pipe,
A generator that generates electricity using the heat obtained in the heat exchange unit,
It is equipped with a power storage device that stores the electric power obtained by the generator.
The electric heating device is a power generation system driven by at least the electric power from the power storage device. A dehydrogenation reactor including a second passage provided with a second catalyst for promoting the dehydrogenation reaction of the organic hydride, and a second discharge extending from the second passage to the outside of the dehydrogenation reactor and connecting to the gas-liquid separator. An electric heating device for heating at least one of the second passage and the second catalyst in a dehydrogenation system having a tube.
A heat exchange unit that cools the second discharge pipe,
A generator that generates electricity using the heat obtained in the heat exchange unit,
It is equipped with a power storage device that stores the electric power obtained by the generator.
The electric heating device is driven based on at least the electric power from the power storage device.
During the first mode of warming the second catalyst in order to activate the dehydrogenation reaction inside the second passage, the flow rate of the heat medium flowing in the heat medium circulation path including the heat exchange unit is the flow rate per unit time. The pump of the heat medium circulation path is controlled so as to be greater than 0 and equal to or less than the first flow rate, the electric heating device is driven, and charging in the power storage device is stopped.
During the second mode after the dehydrogenation reaction in the second passage is activated, the flow rate of the heat medium flowing through the heat medium circulation path per unit time is larger than the first flow rate. A power generation system in which the pump of the heat medium circulation path is controlled so as to be, and charging is performed in the power storage device. A dehydrogenation reactor including a second passage provided with a second catalyst for promoting the dehydrogenation reaction of the organic hydride, and a second discharge extending from the second passage to the outside of the dehydrogenation reactor and connecting to the gas-liquid separator. An electric heating device for heating at least one of the second passage and the second catalyst in a dehydrogenation system having a tube.
A heat exchange unit that cools the second discharge pipe,
A generator that generates electricity using the heat obtained in the heat exchange unit,
It is equipped with a power storage device that stores the electric power obtained by the generator.
The electric heating device is driven based on at least the electric power from the power storage device.
During the first mode of warming the second catalyst in order to activate the dehydrogenation reaction inside the second passage, the flow of the heat medium in the heat medium circulation path including the heat exchange section is stopped. The pump of the heat medium circulation path is controlled, the electric heating device is driven, and charging in the power storage device is stopped.
During the second mode after the dehydrogenation reaction in the second passage is activated, the pump of the heat medium circulation path is controlled so that the heat medium flows in the heat medium circulation path, and the power storage device. A power generation system that is charged in. The generator is connected to an expander provided in the working medium circulation path.
The heat medium flowing through the heat medium circulation path undergoes heat exchange with the working medium flowing through the working medium trunk path via an evaporator provided in the working medium circulation path.
The power generation system according to any one of claims 11 and 12, wherein the boiling point of the working medium is lower than the boiling point of the heat medium. An inverter that converts the power of the power storage device from direct current to alternating current,
Further, it is provided with a power supply changeover switch for switching the power supply to the electric heating device between the power storage device and a commercial power source that supplements the power from the power storage device.
The power generation system according to any one of claims 10 to 13, wherein the electric heating device heats at least one of the second passage and the second catalyst by induction heating. A dehydrogenator including a second passage provided with a second catalyst for promoting the dehydrogenation reaction of the organic hydride, and a second discharge extending from the second passage to the outside of the dehydrogenator and connecting to the gas-liquid separator. In a dehydrogenation system having a tube, an electric heating device for heating at least one of the second passage and the second catalyst, a heat exchange section for cooling the second discharge tube, and heat obtained by the heat exchange section are used. It is a control method of a power generation system having a generator for generating power and a power storage device for storing the power obtained by the generator.
In order to activate the dehydrogenation reaction inside the second passage, the heat medium circulation path is such that the flow rate of the heat medium flowing through the heat medium circulation path including the heat exchange unit per unit time is equal to or less than the first flow rate. A third step in which the pump is controlled, the electric heating device is driven based on the electric power from the power storage device, and charging in the power storage device is stopped.
After the dehydrogenation reaction inside the second passage is activated, the heat medium flows into the heat medium circulation path so that the flow rate of the heat medium per unit time becomes a second flow rate higher than the first flow rate. A control method comprising a fourth step in which a pump in a circulation path is controlled, the electric heating device is stopped, and charging is performed in the power storage device.

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