JP2020078104A - Power generation system - Google Patents

Abstract

To provide a power generation system capable of effectively making use of heat generated by a dehydrogenation reaction or a hydrogenation reaction.SOLUTION: A power generation system 2 comprises: an electric heating device 15 for warming at least one of a first passage 13a and a first catalyst 13b in a hydrogenation system 1 comprising a hydrogenation reactor 13 including the first passage 13a in which the first catalyst 13b for accelerating a hydrogenation reaction of an aromatic compound is provided, and a first discharge pipe 14 extending outside the hydrogenation reactor 13 from the first passage 13a; a heat exchange part 35 for cooling at least one of the first passage 13a, the first catalyst 13b and the first discharge pipe 14; a power generator 46 for performing power generation using heat obtained by the heat exchange part 35; and a power storage device 47 for storing power obtained by the power generator 46. The electric heating device 15 is driven based on at least power given from the power storage device 47.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power generation system in a hydrogen addition system and 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 has not been used particularly effectively.

  Therefore, an object of the present invention is to provide a power generation system that can effectively utilize the heat generated in the dehydrogenation reaction and 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 a hydrogenation reaction of an aromatic compound, and a first exhaust extending from the first passage to the outside of the hydrogenation reactor. In a hydrogenation system having a pipe, an electric heating device that warms at least one of the first passage and the first catalyst, a heat exchange unit that cools at least one of the first passage, the first catalyst, and the first discharge pipe, and heat exchange The electric heating device is driven based on at least the electric power from the power storage device. The electric heating device includes a generator that generates electric power using the heat obtained by the unit and a power storage device that stores the electric power obtained by the power generator.

The heat generated after the hydrogenation reaction is activated is converted into electric energy by the 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 used. In particular, cooling of the hydrogenation reactor and the exhaust pipe and power generation can be realized at the same time, and the hydrogen reaction can be carried out using as little energy as possible from the outside.

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

  Preferably, a heat transfer device whose on / off state is switched based on an electric signal is provided between at least one of the first passage and the first catalyst and the heat exchange section, and the heat transfer device is in either an on state or an off state. In either case, the heat of the hydrogenation reactor is transferred to the heat exchange section through the heat transfer device, and when the heat transfer device is in either the on state or the off state, 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 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 using the heat transfer device.

  More preferably, during the first mode in which the first catalyst is warmed to activate the hydrogenation reaction inside the first passage, the flow rate of the heat medium flowing through the heat medium circulation passage including the heat exchange unit per unit time. Is controlled to be greater than 0 and less than or equal to the first flow rate, the electric heating device is driven, charging of the power storage device is stopped, and the hydrogenation reaction inside the first 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 the 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 for supplying electric power to the electric heating device without charging.
In the second mode, the power storage device is used for charging electric power generated by the generator without discharging.
Since the discharging and the charging are performed separately in terms of time, the load on the power storage device can be reduced and the deterioration of the power storage device can be prevented, as compared with the case where the discharging and the charging are performed in the same time zone.

  By keeping the heat medium flowing in the heat medium circulation path and keeping the working medium flowing in the working medium circulation path, it is difficult for the heat medium and working medium to solidify or stay in the circulation path. I can.

  Further, preferably, during the first mode in which the first catalyst is heated to activate the hydrogenation reaction inside the first passage, the flow of the heat medium in the heat medium circulation passage 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 of 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 for supplying electric power to the electric heating device without charging.
In the second mode, the power storage device is used for charging electric power generated by the generator without discharging.
Since the discharging and the charging are performed separately in terms of time, the load on the power storage device can be reduced and the deterioration of the power storage device can be prevented, as compared with the case where the discharging and the charging are performed in the same time zone.

  More preferably, 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, and the temperature of at least one of the first passage and the second catalyst is When the first temperature threshold is exceeded, switching from the first mode to the second mode is performed, and after the 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 value which is equal to the threshold value or lower than the first temperature threshold value can be maintained.

  As soon as the hydrogenation reaction can be activated, the aromatic compound and hydrogen can be supplied to the hydrogenation reactor.

  The flow rate of the heat medium circulation passage is controlled so that the temperature in the vicinity of the catalyst is maintained to be lowered to the second temperature threshold value lower than the first temperature threshold value. For this reason, the amount of heat obtained in the heat exchange unit is increased and the amount of power generation can be increased compared to the case where the temperature near the catalyst is maintained at the first temperature threshold.

  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 is provided via an evaporator provided in the working medium circulation path. Heat exchange is performed with the working medium flowing through the working medium trunk, and the boiling point of the working medium is lower than the boiling point of the heating medium.

  Since the heat of the hydrogenation reactor and the first exhaust pipe, which have large temperature changes, is indirectly transferred to the working medium circuit, the heat of the hydrogenation reactor and the first exhaust pipe is directly transferred to the working medium circuit. Compared to the form, it becomes possible to continue stable power generation regardless of whether the temperature of the hydrogenation reactor or the first exhaust pipe is high or low.

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

  By heating the dehydrogenation reactor by induction heating, it becomes possible to raise the temperature in the vicinity of the catalyst to a predetermined temperature (first temperature threshold value) in a shorter time than in other electric heating methods.

  A method for controlling a power generation system according to the present invention includes a hydrogenation reactor including a first passage provided with a first catalyst for promoting a hydrogenation reaction of an aromatic compound, and extending from the first passage to the outside of the hydrogenation reactor. An electric heating device for warming at least one of the first passage and the first catalyst, and a heat exchange unit for cooling at least one of the first passage, the first catalyst, and the first exhaust pipe in a hydrogenation system having a first exhaust pipe. A method for controlling a power generation system having a power generator for generating power using heat obtained by a heat exchange section and a power storage device for storing electric power obtained by the power generator, the method comprising: 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 through 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 first step in which the electric heating device is driven based on the electric power from the power supply device and the charging in the power storage device is stopped, and the heat medium flowing in the heat medium circulation path after the hydrogenation reaction inside the first passage is activated. A second step in which the pump in the heat medium circulation path is controlled so that the flow rate per unit time of the second flow rate is higher than the first flow rate, the electric heating device is stopped, and the power storage device is charged. Equipped with.

  The power generation system according to the present invention includes a dehydrogenation reactor including a second passage provided with a second catalyst for promoting the dehydrogenation reaction of organic hydride, and a gas-liquid separator extending from the second passage to the outside of the dehydrogenation reactor. In a dehydrogenation system having a second discharge pipe connected to the electric heating device for heating at least one of the second passage and the second catalyst, a heat exchange part for cooling the second discharge pipe, and a heat exchange part. The electric heating device includes a generator that generates electric power using heat and a power storage device that stores the electric power obtained by the power generator. The electric heating device is driven based on at least the electric power from the power storage device.

The heat of the second exhaust pipe, which has become high temperature due to the dehydrogenation reaction, is converted into electric energy by the 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, the cooling of the second discharge pipe and the power generation can be realized at the same time, and the dehydrogenation reaction can be performed with the least possible use of external energy.

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

  Preferably, during the first mode in which the second catalyst is warmed in order 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 per unit time is The pump in the heat medium circulation path is controlled so that the flow rate is greater than 0 and equal to or less than the first flow rate, the electric heating device is driven, 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 the second flow rate higher than the first flow rate. In addition, the power storage device is charged.

In the first mode, the power storage device is used for supplying electric power to the electric heating device without charging.
In the second mode, the power storage device is used for charging electric power generated by the generator without discharging.
Since the discharging and the charging are performed separately in terms of time, the load on the power storage device can be reduced and the deterioration of the power storage device can be prevented, as compared with the case where the discharging and the charging are performed in the same time zone.

  By keeping the heat medium flowing in the heat medium circulation path and keeping the working medium flowing in the working medium circulation path, it is difficult for the heat medium and working medium to solidify or stay in the circulation path. I can.

  Further, preferably, during the first mode in which the second catalyst is heated to activate the dehydrogenation reaction inside the second passage, the flow of the heat medium in the heat medium circulation passage 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 of the power storage device is stopped, and the dehydrogenation reaction inside the second passage is activated, The pump in the heat medium circulation path is controlled so that the heat medium flows in the heat medium circulation path, and the power storage device is charged.

In the first mode, the power storage device is used for supplying electric power to the electric heating device without charging.
In the second mode, the power storage device is used for charging electric power generated by the generator without discharging.
Since the discharging and the charging are performed separately in terms of time, the load on the power storage device can be reduced and the deterioration of the power storage device can be prevented, as compared with the case where the discharging and the charging 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 is provided via an evaporator provided in the working medium circulation path. Heat exchange is performed with the working medium flowing through the working medium trunk, and the boiling point of the working medium is lower than the boiling point of the heating medium.

  Since the heat of the second discharge pipe, which has a large temperature change, is indirectly transmitted to the working medium circulation passage, the heat of the second discharge pipe is directly transmitted to the working medium circulation passage, as compared with the case where the heat of the second discharge pipe is directly transmitted to the working medium circulation passage. It is possible to stably generate power regardless of whether the temperature is high or low.

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

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

  A method for controlling a power generation system according to the present invention includes a dehydrogenation reactor that includes a second passage provided with a second catalyst that promotes a dehydrogenation reaction of organic hydride, and an expansion gas from the second passage to the outside of the dehydrogenation reactor. In a dehydrogenation system having a second discharge pipe connected to a liquid separator, an electric heating device that warms 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 A method for controlling a power generation system having a power generator for generating power using the obtained heat and a power storage device for storing the power obtained by the power generator, wherein a dehydrogenation reaction inside a second passage is activated. In order to realize the above, 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 per unit time is equal to or less than the first flow rate, and 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 the dehydrogenation reaction in the second passage is activated, A fourth step in which the pump of the heat medium circulation path is controlled so that the flow rate becomes the 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 that can effectively utilize the heat generated in the dehydrogenation reaction or the hydrogenation reaction.

It is a schematic diagram which shows the structure of the hydrogen addition system including the electric power generation system which used the alternating current drive electric heating device in 1st Embodiment, and used the heat medium circulation path. It is a flowchart which shows the control procedure of each part when performing the 1st mode and 2nd mode in 1st Embodiment and 2nd Embodiment. It is a schematic diagram which shows the structure of the hydrogen addition system containing the electric power generation system which used the direct-current drive electric heating apparatus in 1st Embodiment, and used the heat medium circulation path. It is a schematic diagram which shows the structure of the hydrogen addition system containing the electric power generation system which used the alternating current drive electric heating device in 1st Embodiment, and abbreviate | omitted the heat medium circulation path. It is a schematic diagram which shows the structure of the hydrogen addition system including the electric power generation system which used the direct-current drive electric heating apparatus in 1st Embodiment, used the heat medium circulation path, and used the heat transfer apparatus. It is a schematic diagram which shows the structure of the dehydrogenation system including the electric power generation system which used the alternating current drive electric heating apparatus in 2nd Embodiment, and used the heat medium circulation path. It is a schematic diagram which shows the structure of the dehydrogenation system containing the electric power generation system which used the direct-current drive electric heating apparatus in 2nd Embodiment, and used the heat medium circulation path. It is a schematic diagram which shows the structure of the dehydrogenation system containing the electric power generation system which used the alternating current drive electric heating device in 2nd Embodiment, and abbreviate | omitted the heat medium circulation path.

Hereinafter, a first embodiment (a 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 passage 31, Heat medium circulation passage pump 33, heat exchange unit 35, evaporator 37, working medium circulation passage 41, working medium circulation passage pump 43, expander 45, generator 46, power storage device 47, power source changeover switch 48, condenser 49, The controller 51 is provided.

  The power generation system 2 in the hydrogenation system 1 includes an electric heating device 15, a heat medium circulation passage 31, a heat medium circulation passage pump 33, a heat exchange section 35, an evaporator 37, a working medium circulation passage 41, a working medium circulation passage pump 43, It includes an expander 45, a generator 46, a power storage device 47, a power source 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 of the first tank 11.
The first actuator 11 a adjusts the opening degree of the opening in the first tank 11 under the control of the control unit 51.
The flow rate of the aromatic compound supplied from the first tank 11 to the hydrogenation reactor 13 is adjusted by the operation of the first actuator 11a.

The hydrogenation reactor 13 causes the aromatic compound supplied from the first tank 11 to undergo a hydrogenation reaction. Specifically, hydrogen is added to the aromatic compound to generate 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 the aromatic compound and hydrogen pass in the hydrogenation reactor 13.
The first catalyst 13b is made of platinum or the like and is used to promote 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 on 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 section 35.
Details of the heat exchange section 35 will be described later.

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

The electric heating device 15 warms 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 be a part of the electric heating device 15 or a part of the hydrogenation reactor 13.

  By warming the hydrogenation reactor 13 by induction heating, it is possible to raise the temperature Te in the vicinity of the first catalyst 13b to a predetermined temperature (first temperature threshold value Te1) or more in a shorter time than other electric heating methods. It will be possible.

  However, the electric heating device 15 is not limited to the one using 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 power storage device 47 is not sufficient, electric heating device 15 is driven based on the electric power from the commercial power supply that supplements the electric power from power storage device 47.

The first hydrogen tank 19 stores hydrogen supplied to the hydrogenation reactor 13.
A second actuator 19a is provided at the opening of 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.
The flow rate of hydrogen supplied from the first hydrogen tank 19 to the hydrogenation reactor 13 is adjusted by the operation of the second actuator 19a.

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

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

The heat medium circulation passage 31 is provided with a portion (heat exchange portion 35) that is 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 section 35, and thereby heats the heat medium.

  An evaporator 37 is provided in the heat medium circulation path 31.

A low boiling point medium such as pentane or ammonia is filled as a working medium in the inside of the pipe forming the working medium circulation path 41.
The boiling point of the working medium flowing through the working medium circulation path 41 is lower than the boiling point of the heating medium flowing through the heating medium circulation path 31.
The working medium circulates in the working medium circulating passage 41 via the working medium circulating passage pump 43.
The working medium circulation path 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 heats and evaporates the working medium in the working medium circulation path 41 by the heat medium in the heating medium circulation path 31.

The expander 45 including a turbine and the like is arranged in the working medium circulation path 41 downstream of the evaporator 37.
The expander 45 expands the working medium vaporized by the evaporator 37, thereby rotating the turbine and taking out kinetic energy from the working medium.
The expander 45 drives the generator 46.
Specifically, the generator 46 is connected to the drive shaft 45a of the expander 45, and the generator 46 generates electricity by the rotation of 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 source changeover switch 48.

  The power supply 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 supply, 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 and condenses the working medium.
For example, the condenser 49 functions as a heat exchange device, and the working medium in the working medium circulation path 41 is cooled by the refrigerant in 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 passage pump 33, working medium circulation passage pump 43, generator 46, power storage device 47, power supply). The changeover switch 48) is controlled.

  From the time when the hydrogenation system 1 is operated until the hydrogenation reaction in the hydrogenation reactor 13 becomes a state where it can be activated, that is, until the temperature Te near the first catalyst 13b exceeds the first temperature threshold value Te1. Meanwhile, assuming that the hydrogen addition system 1 is in the first mode, the control unit 51 controls each unit such that the temperature Te near the first catalyst 13b becomes higher than the first temperature threshold value Te1 (first step). , Steps S11 to S15 in FIG. 2).

  After the hydrogenation reaction in the hydrogenation reactor 13 is activated, 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 becomes the second As the 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 necessary to activate the hydrogenation reaction in the hydrogenation reactor 13 (for example, Te1 = 150 ° C.).
The second temperature threshold value Te2 is set to a temperature required to maintain the activated state of the hydrogenation reaction after the activation of the hydrogenation reaction (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 unit 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 unit is executed from the time the user operates the hydrogen addition system 1 until the time the operation to stop the operation is performed.

When the user operates the hydrogen addition system 1, the control unit 51 determines in step S11 whether the power storage device 47 can drive the electric heating device 15 during the first period T1. To judge.
The first period T1 is set to the time required to warm the first catalyst 13b from the sufficiently cooled state to the temperature at which the hydrogenation reaction can be activated by the electric heating device 15.

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

  When the power storage device 47 is not in a state of being able to drive the electric heating device 15 during the first period T1 such as the electric power stored in the power storage device 47 is not sufficient, the control unit 51 performs electric heating from the commercial power source in step S13. The power switch 48 is controlled so that the device 15 is supplied with power.

  In the first embodiment, a mode will be described in which whether to drive the power storage device or to drive the commercial power supply is determined immediately after the start of operation, and the power supply is not switched thereafter. However, the control unit 51 causes the power storage device 47 to perform the electric heating during the operation. When it is determined whether or not the device 15 can be driven, and when it is determined that the power storage device 47 is not in a state in which the electric heating device 15 can be driven, the control unit 51 changes the power supply from the power storage device drive to the commercial power supply drive. Alternatively, the changeover switch 48 may be controlled.

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

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

When the first catalyst 13b is sufficiently warmed, the hydrogenation reaction in the first passage 13a becomes ready to be activated, and the first mode is switched 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 the heat medium circulation path. The pump 33 and the working medium circulation pump 43 are turned on, the electric heating device 15 is stopped, and the power storage device 47 is charged from the generator 46.
Thereby, 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 heating medium circulation path 31, and the generator 46 generates electricity based on the heat. To do.

Control unit 51 determines in step S17 whether power storage device 47 is in a sufficiently charged state.
The state of being fully charged here is not limited to the case where the power storage device 47 is in a fully charged state or a state of approximately 80% to 90% of the fully charged state, and the hydrogen addition system 1 is stopped to perform the first state. The catalyst 13b may be in a state in which electric power is stored to drive the electric heating device 15 in order to warm it from the 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 power generator 46 in step S18, or stops the power supply (charge) from the power generator 46 to the power storage device 47. Let
When the power storage device 47 is not sufficiently charged, step S17 is repeated after a predetermined time (for example, 1 minute) has elapsed.

  In addition, during the second mode, even when the generator 46 is turned off or the power supply from the generator 46 to the power storage device 47 is stopped, the hydrogenation reactor 13 and the first exhaust pipe 14 are cooled. In order to continue, the control unit 51 continues to operate the heat medium circulation passage pump 33, and continues to circulate the heat medium in the heat medium circulation passage 31.

Further, the control unit 51 controls the flow rate of the heat medium circulation passage 31, that is, the output of the heat medium circulation passage pump 33, so that the temperature Te near the first catalyst 13b is maintained at the second temperature threshold value Te2. To control.
Specifically, when the temperature Te in the vicinity of the first catalyst 13b becomes higher than or equal to the second temperature threshold value Te2, the control unit 51 increases the output of the heat medium circulation passage pump 33.
Further, when the temperature Te near 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 passage 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 is activated 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) control of the heat medium circulation path pump 33.
Specifically, when the temperature Te near 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 near 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 be 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 until the second temperature threshold value Te2 lower than the first temperature threshold value Te1. Therefore, as compared with the form in which the temperature Te near the first catalyst 13b is maintained at the first temperature threshold value Te1, the amount of heat obtained by the heat exchange unit 35 is large, and the amount of power generation can be increased. ..

In the hydrogenation reactor 13, when the hydrogenation reaction is activated, the temperature of the first passage 13a and the like rapidly increases due to the hydrogenation reaction. However, in order to maintain the activated state of the hydrogenation reaction, it is not necessary to make the temperature of the first passage 13a or the like much higher than the first temperature threshold value Te1.
In the first embodiment, heat generated after the hydrogenation reaction is activated is transmitted to the working medium circulation path 41, converted into rotational force by the expander 45, and converted into electric energy by the generator 46. To do.
The electric energy is stored in the electric storage device 47 and then used to heat the electric heating device 15.
Therefore, the heat generated by the hydrogenation reaction can be effectively used. 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 performed with the least possible use of external energy.

In the first mode, power storage device 47 is used for supplying electric power to electric heating device 15 without charging.
In the second mode, power storage device 47 is used for charging the electric power generated by generator 46 without discharging.
Since the discharging and the charging are performed separately in terms of time, the load 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 case where the discharging and the charging are performed in the same time zone. ..

The control unit 51 may be in a form of turning off the heat medium circulation passage pump 33 and the working medium circulation passage pump 43, but the heat medium circulation passage pump 33 and the working medium circulation passage pump 43 are weakly 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. The line pump 33 and the working medium circulation pump 43 are controlled.
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, which is higher than the first flow rate. The line pump 33 and the working medium circulation pump 43 are controlled.

  By maintaining the state where the heat medium flows through the heat medium circulation path 31 and maintaining the state where the working medium flows through the working medium circulation path 41, the heat medium and the working medium solidify or stay in the circulation path. It is 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, the aromatic compound or hydrogen can be supplied to the hydrogenation reactor 13 as soon as the hydrogenation reaction can be activated.

However, the determination of switching from the first mode to the second mode may be performed based on other information.
For example, assuming that the first mode is in the first period T1 after the hydrogenation reactor 13 is operated, the control unit 51 controls each unit, and after the first period T1 has elapsed, the control unit 51 is in the second mode. As an example, the control unit 51 may be configured to control each unit.

In addition, in the first embodiment, the electric heating device 15 is described as being driven by an alternating current, such as an induction heating type heater, but the electric heating device 15 is a resistance heating type heater. It may be driven.
In this case, the inverter 47b between the power storage device 47 and the power source changeover switch 48 is omitted, and the second converter 52 is provided between the commercial power source and the power source 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 via the heating medium of the heating medium circulation path 31. Described the form.
Since the heat of the hydrogenation reactor 13 and the first exhaust pipe 14 which greatly change in temperature is indirectly transmitted to the working medium circulation path 41, the heat of the hydrogenation reactor 13 and the first exhaust pipe 14 is directly transferred to the working medium. Compared with the mode in which the temperature is transmitted to the circulation path 41, it becomes possible to stably generate power regardless of whether the temperature of the hydrogenation reactor 13 or the first exhaust pipe 14 is high or low.

However, in order to prioritize the simplification of the system, the heat medium circulation passage 31 is omitted, and the heat of the hydrogenation reactor 13 and the first discharge pipe 14 is directly applied to the working medium of the working medium circulation passage 41. It may be transmitted (see FIG. 4).
In this case, the working medium circulation path 41 is provided with a portion (evaporator 37) that is in contact with at least one of the hydrogenation reactor 13 and the first discharge pipe 14 as a portion corresponding to the heat exchange section 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 electrically is used as a heater for warming the hydrogenation reactor 13.
Therefore, as a heater for warming the hydrogenation reactor 13, it is possible to reduce the generation of exhaust gas due to combustion, as compared with the case of burning organic hydride or an aromatic compound.

Further, in order to continue the hydrogenation reaction, it is necessary to maintain the temperature Te near the first catalyst 13b at a predetermined temperature (second temperature threshold value Te2) or higher.
Therefore, when the heat medium circulation passage 31 and the hydrogenation reactor 13 are in contact with each other, the heat exchange section 35 of the heat medium circulation passage 31 is not directly in contact with the first passage 13a of the hydrogenation reactor 13, A heat transfer device (for example, a Peltier element) 31a for transferring the heat of the hydrogenation reactor 13 to the heat exchange section 35 of the heat medium circulation path 31 by electrical control when necessary is provided in the heat medium circulation path 31. It is desirable to be provided between the heat exchange section 35 and the first passage 13a of the hydrogenation reactor 13 (see FIG. 5).
In this case, the control unit 51 controls the switching of 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 value Te2, the heat transfer device 31a is turned on, and the hydrogen transfer reactor 13 of the hydrogen addition 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 near the first catalyst 13b is less than the second temperature threshold value Te2, the heat transfer device 31a is turned off, and the heat transfer medium for circulating the heat of the hydrogenation reactor 13 is passed through the heat transfer device 31a. No move to road 31.

  Even in this case, the first discharge pipe 14 and the heat exchange section 35 of the heat medium circulation path 31 may be in a form of directly contacting 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 (heating medium circulation path 31 and working medium circulation path 41) has been described. Alternatively, the power may be directly generated based on the heat obtained by the exchange 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. A mode is conceivable in which power generation is performed 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 section 35 and the generator 46.

Next, a second embodiment (power generation system 20 provided in the dehydrogenation system 10) will be described.
The dehydrogenation system 10 according to 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, a heat medium circulation passage 310, Heat medium circulation passage pump 330, heat exchange section 350, evaporator 370, working medium circulation passage 410, working medium circulation passage pump 430, expander 450, generator 460, power storage device 470, power source changeover switch 480, condenser 490, The controller 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 passage 310, a heat medium circulation passage pump 330, a heat exchange section 350, an evaporator 370, a working medium circulation passage 410, a working medium circulation passage pump 430, It includes an expander 450, a generator 460, a power storage device 470, a power source 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 of the tenth tank 110.
The tenth actuator 110 a adjusts the opening degree of the opening in the tenth tank 110 under the control of the control unit 510.
The flow rate of the organic hydride supplied from the tenth tank 110 to the dehydrogenation reactor 130 is adjusted by the operation of the tenth actuator 110a.

The dehydrogenation reactor 130 causes a dehydrogenation reaction of 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 of the dehydrogenation reactor 130 through which the organic hydride passes.
The second catalyst 130b is used to promote 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 on 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 section 350.
Details of the heat exchange section 350 will be described later.

The electric heating device 150 warms 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 here may be a part of the electric heating device 150 or 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 shorter time than other electric heating methods. become.

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

Electric heating device 150 is driven based on the electric power from power storage device 470.
However, when the electric power stored in power storage device 470 is not sufficient, electric heating device 150 is driven based on the electric power from the commercial power supply that supplements the electric power from power storage device 470.

The gas-liquid separator 170 separates the gas (hydrogen) discharged from the dehydrogenation reactor 130 and the liquid (aromatic compound such as toluene or organic hydride) by using activated carbon or a polymer membrane, and the gas ( Hydrogen) is discharged to the tenth hydrogen tank 190, and the liquid (aromatic compound or organic hydride) is discharged to the twentieth tank 210.
The tenth hydrogen tank 190 stores hydrogen obtained by the dehydrogenation reaction in the dehydrogenation reactor 130.
The twentieth tank 210 stores the aromatic compound obtained by the dehydrogenation reaction in the dehydrogenation reactor 130 and the organic hydride that has not been completely dehydrogenated.

The inside of the pipe forming the heat medium circulation path 310 is filled with a heat medium (for example, water) for heating the working medium in 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 pump 330 is driven based on the electric power from the commercial power source. However, the heat medium circulation path pump 330 may be configured to 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 section 350) that is 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 section 350, thereby warming the heat medium.

  An evaporator 370 is provided in the heat medium circulation path 310.

A low boiling point medium such as pentane or ammonia is filled as a working medium inside the pipe forming the working medium circulation path 410.
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 path pump 430 is driven based on the electric power from the commercial power source. However, the working medium circulation path pump 430 may be configured to 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 heats and evaporates the working medium in the working medium circulation path 410 by the heat medium in the heating medium circulation path 310.

The expander 450 including a turbine or the like is arranged in the working medium circulation path 410 downstream of the evaporator 370.
The expander 450 expands the working medium vaporized by the evaporator 370, thereby rotating the turbine and taking out kinetic energy from the working medium.
The expander 450 drives the generator 460.
Specifically, the power generator 460 is connected to the drive shaft 450a of the expander 450, and the power generator 460 generates power by rotation of 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 source changeover switch 480.

  The power supply 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 arranged downstream of the expander 450 in the working medium circulation path 410 and condenses the working medium.
For example, the condenser 490 functions as a heat exchange device, and the working medium in the working medium circulation path 410 is cooled by the refrigerant in 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 includes each unit of the dehydrogenation system 10 (the tenth actuator 110a, the electric heating device 150, the heat medium circulation passage pump 330, the working medium circulation passage pump 430, the generator 460, the power storage device 470, the power source changeover switch 480, etc.). To control.

  From the time when the dehydrogenation system 10 is operated until the time when the dehydrogenation reaction in the dehydrogenation reactor 130 becomes activating, that is, until the temperature Te near the second catalyst 130b exceeds the third temperature threshold value Te3. Meanwhile, assuming that the dehydrogenation system 10 is in the first mode, the control unit 510 controls each part such that the temperature Te near the second catalyst 130b becomes higher than the third temperature threshold value Te3 (third step). , Steps S11 to S15 in FIG. 2).

  After the dehydrogenation reaction in the dehydrogenation reactor 130 is activated, 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 becomes the second In the mode, the control unit 510 controls each unit so that the temperature Te near the second catalyst 130b can be maintained in a state 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 to activate the dehydrogenation reaction in the dehydrogenation reactor 130 (for example, Te3 = 220 ° C.).
The fourth temperature threshold value Te4 is set to a temperature necessary for maintaining the activated state of the dehydrogenation reaction after the dehydrogenation reaction is activated (Te3> Te4).
However, the fourth temperature threshold Te4 may be the same as the third temperature threshold Te3.

The control procedure of each unit 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 unit is executed from the time the user operates the dehydrogenation system 10 until the time the operation to stop the operation is performed.

When the user operates the dehydrogenation system 10, the control unit 510 determines in step S11 whether the power storage device 470 can drive the electric heating device 150 during the second period T2. To judge.
The second period T2 is set to the time required for warming the second catalyst 130b in the electric heating device 150 from a sufficiently cooled state to a temperature at which the dehydrogenation reaction can be activated.

  When the battery is sufficiently charged and the power storage device 470 is in a state of being able to drive the electric heating device 150 during the second period T2, the control unit 510 moves the power storage device 470 to the electric heating device 150 in step S12. The power source changeover switch 480 is controlled so that power is supplied.

  If the power storage device 470 is not in a state of being able to drive the electric heating device 150 during the second period T2, such as the electric power stored in the power storage device 470 is not sufficient, the control unit 510, in step S13, performs the electric heating from the commercial power source. The power source changeover switch 480 is controlled so that power is supplied to the device 150.

  In the second embodiment, a mode will be described in which it is determined whether the power storage device is to be driven or the commercial power source is to be driven immediately after the start of operation, and the power supply is not switched thereafter. However, during operation, the control unit 510 causes the power storage device 470 to electrically heat. When it is determined whether the device 150 can be driven, and when it is determined that the power storage device 470 cannot drive the electric heating device 150, the control unit 510 changes the power supply from the power storage device drive to the commercial power supply. Alternatively, the changeover switch 480 may be controlled.

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

Control unit 510 determines in step S15 whether temperature Te near second catalyst 130b is higher than third temperature threshold value Te3.
When the temperature Te near the second catalyst 130b is higher than the third temperature threshold value Te3, the process proceeds to step S16.
When the temperature Te near 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 ready for activation, and the first mode is switched to the second mode.
In step S16, control unit 510 drives tenth actuator 110a so that the opening of tenth tank 110 is opened, turns on heat medium circulation passage pump 330 and working medium circulation passage pump 430, and from generator 460. 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.

Control unit 510 determines in step S17 whether power storage device 470 is in a sufficiently charged state.
The state of being fully charged here is not limited to the case where the power storage device 470 is a fully charged state or a state of about 80% to 90% of the fully charged state, and the dehydrogenation system 10 is stopped to The catalyst 130b may be in a state in which electric power is stored to drive the electric heating device 150 to warm the catalyst 130b from the sufficiently cooled state to the third temperature threshold value Te3.

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

  Note that during the second mode, even when the generator 460 is turned off or the power supply from the generator 460 to the power storage device 470 is stopped, the cooling of the second exhaust pipe 140 is continued, so the control unit 510. Keeps operating the heat medium circulation path pump 330 and continues circulating the heat medium in the heat medium circulation path 310.

In addition, the control unit 510 controls the driving of the electric heating device 150 so that the temperature Te near the second catalyst 130b is maintained at the fourth temperature threshold value Te4.
Specifically, when the temperature Te near 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 near 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 be 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 exhaust pipe 140 rises due to the dehydrogenation reaction. However, in the gas-liquid separator 170 in the latter stage, in order to separate the gas (hydrogen) discharged from the dehydrogenation reactor 130 and the liquid (aromatic compound such as toluene or organic hydride), a mixture of the gas and the liquid. It is desirable to keep it cold.
In the second embodiment, the heat of the second exhaust pipe 140, which has become high temperature due to the dehydrogenation reaction, is transferred to the working medium circulation path 410, converted into rotational force by the expander 450, and converted into electric energy by the generator 460. To do.
The electric energy is stored in the electric 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, the cooling of the second discharge pipe 140 and the power generation can be realized at the same time, and the dehydrogenation reaction can be executed with the least use of external energy.

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

The control unit 510 may have a configuration in which the heat medium circulation passage pump 330 and the working medium circulation passage pump 430 are turned off, but the heat medium circulation passage pump 330 and the working medium circulation passage pump 430 are weakly output. It may be in the form of maintaining the operation.
For example, in step S14 of the first mode, 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 not more than the first flow rate. The line pump 330 and the working medium circuit pump 430 are controlled.
In step S16 of the second mode, 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 become the second flow rate which is higher than the first flow rate. The line pump 330 and the working medium circuit pump 430 are controlled.

  By maintaining the state where the heat medium flows through the heat medium circulation path 310 and maintaining the state where the working medium flows through the working medium circulation path 410, the heat medium and the working medium solidify or stay in the circulation path. It is 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 can be activated, 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, it is assumed that the first mode is in the second period T2 after the dehydrogenation reactor 130 is operated, the control unit 510 controls each unit, and the second mode is in the second mode after the second period T2. As an example, the control unit 510 may be configured to control each unit.

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

Further, in the second embodiment, the form in which the heat of the second discharge pipe 140 is indirectly transmitted to the working medium of the working medium circulation path 410 via the heating medium of the heating medium circulation path 310 has been described.
Since the heat of the second discharge pipe 140, which has a large temperature change, is indirectly transmitted to the working medium circulation passage 410, the heat of the second discharge pipe 140 is directly transmitted to the working medium circulation passage 410 as compared with the case of 2 It is possible to stably generate power regardless of whether the temperature of the discharge pipe 140 is high or low.

However, in order to simplify the system, the heat medium circulation passage 310 is omitted, and the heat of the second discharge pipe 140 is directly transmitted to the working medium in the working medium circulation passage 410. (See FIG. 8).
In this case, the working medium circulation path 410 is provided with a portion (evaporator 370) that is in contact with the second discharge pipe 140 as a portion corresponding to the heat exchange section 350.
The working medium passing through the working medium circulation path 410 is heated and evaporated by passing through the evaporator 370.

In addition, in the second embodiment, an electric heating device 150 that is electrically driven is used as a heater for warming the dehydrogenation reactor 130.
Therefore, as a heater for warming the dehydrogenation reactor 130, generation of exhaust gas due to combustion can be reduced as compared with a mode in which organic hydride or an aromatic compound is burned.

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 (heating medium circulation path 310 and working medium circulation path 410) has been described. Alternatively, the power may be directly generated based on the heat obtained by the exchange 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 exhaust pipe 140, and the other contact surface is brought into contact with the outside air or a cooling device such as a heat sink. A mode is conceivable in which power generation is performed 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 section 350 and the generator 460.

1 Hydrogen addition 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 Second catalyst 13c First temperature sensor 130c Second temperature sensor 14 First discharge pipe 140 Second discharge pipe 15,150 Electric heating device 170 Gas-liquid separator 19 First hydrogen tank 19a Second actuator 190 Tenth hydrogen tank 21 2nd tank 210 20th tank 31,310 Heat medium circulation path 31a Heat transfer device 33,330 Heat medium circulation path pump 35,350 Heat exchange part 37,370 Evaporator 41,410 Working medium circulation path 43,430 Working medium Circulation circuit pump 45,450 Expander 45a, 450a Drive shaft 46,460 Generator 47,470 Electric storage device 47a, 470a First converter 47b, 470b Inverter 48,480 Power supply switching switch 49,490 Condenser 51,510 Control unit 52 520 Second converter T1 First period T2 Second period Te Temperature in the vicinity of catalyst Te1 First temperature threshold Te2 Second temperature threshold Te3 Third temperature threshold Te4 Fourth 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 for warming 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;
Using the heat obtained in the heat exchange section, a generator for generating power,
A power storage device for storing 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 whose on / off state is switched based on an electric signal is provided between at least one of the first passage and the first catalyst and the heat exchange section,
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 section via the heat transfer device,
The heat transfer device does not transfer heat of the hydrogenation reactor to the heat exchange section via the heat transfer device when the heat transfer device is in the on state or the off state. Power generation system.   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 passing through the heat transfer device. Power generation system described. During the first mode in which the first catalyst is warmed 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 is The pump of the heat medium circulation path is controlled to be greater than 0 and equal to or less than the first flow rate, the electric heating device is driven, and the charging of the power storage device is stopped,
A second flow rate in which the flow rate of the heat medium flowing through the heat medium circulation path per unit time is higher than the first flow rate during the second mode after the hydrogenation reaction inside the first passage is activated. The power generation system according to any one of claims 1 to 3, wherein the pump in the heat medium circulation path is controlled so that the electric heating device is stopped, and the electric power storage device is charged. During the first mode in which the first catalyst is heated 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 unit is stopped so as to stop. A pump of the heat medium circulation path is controlled, the electric heating device is driven, and charging of the power storage device is stopped;
During the second mode after activation of the hydrogenation reaction inside the first passage, the pump of the heat medium circulation passage is controlled so that the heat medium flows in the heat medium circulation passage, and the electric heating is performed. The power generation system according to claim 1, wherein the device is stopped and the power storage device is charged. Switching control from the first mode to the second mode is performed based on information about 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 a first temperature threshold value, switching from the first mode to the second mode is performed,
After switching to the second mode, a state in which the temperature of at least one of the first passage and the first catalyst is the same as the first temperature threshold value or close to the second temperature threshold value lower than the first temperature threshold value is set. The power generation system according to claim 4, 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,
Through the evaporator provided in the working medium circulation path, the heat medium flowing through the heat medium circulation path is subjected to heat exchange with the working medium flowing through the working medium tree path,
The power generation system according to claim 4, wherein a boiling point of the working medium is lower than a boiling point of the heat medium. An inverter that converts the electric power of the power storage device from direct current to alternating current,
Further comprising a power supply switch that switches power supply to the electric heating device between the power storage device and a commercial power supply that complements power from the power storage device,
The dehydrogenation system according to claim 1, 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 In the system, an electric heating device that warms at least one of the first passage and the first catalyst; a heat exchange unit that cools at least one of the first passage, the first catalyst and the first discharge pipe; and the heat exchange. A method of controlling a power generation system having a power generator that generates power using heat obtained in the section, and a power storage device that stores the power obtained by the power generator,
In order to activate the hydrogenation reaction inside the first passage, the heat medium circulation path is set so 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 first step in which the pump is controlled, the electric heating device is driven based on electric power from the power storage device, and charging in the power storage device is stopped;
After the hydrogenation reaction inside the first passage is activated, the heat medium flowing in the heat medium circulation passage has a second flow rate that is higher than the first flow rate per unit time. A second step in which the pump of the circulation path is controlled, the electric heating device is stopped, and the power storage device is charged. A dehydrogenation reactor including a second passage provided with a second catalyst for accelerating the dehydrogenation reaction of organic hydride, and a second discharge extending from the second passage to the outside of the dehydrogenation reactor and connected to a 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 pipe;
A heat exchange unit for cooling the second discharge pipe,
Using the heat obtained in the heat exchange section, a generator for generating power,
A power storage device for storing 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 in which the second catalyst is warmed in order to activate the dehydrogenation reaction inside the second passage, the flow rate of the heat medium flowing through the heat medium circulation passage including the heat exchange unit per unit time is The pump of the heat medium circulation path is controlled to be greater than 0 and equal to or less than the first flow rate, the electric heating device is driven, and the charging of the power storage device is stopped,
During the second mode after the dehydrogenation reaction inside the second passage is activated, the second flow rate in which the flow rate of the heat medium flowing through the heat medium circulation path per unit time is higher than the first flow rate. The power generation system according to claim 10, wherein the pump of the heat medium circulation path is controlled so as to become, and the power storage device is charged. During the first mode in which the second catalyst is warmed to activate the dehydrogenation reaction inside the second passage, the flow of the heat medium in the heat medium circulation passage including the heat exchange unit is stopped so as to stop. A pump of the heat medium circulation path is controlled, the electric heating device is driven, and charging of the power storage device is stopped;
During the second mode after the dehydrogenation reaction inside the second passage is activated, the pump of the heat medium circulation passage is controlled so that the heat medium flows in the heat medium circulation passage, and the power storage device The power generation system according to claim 10, wherein the charging is performed in. The generator is connected to an expander provided in the working medium circulation path,
Through the evaporator provided in the working medium circulation path, the heat medium flowing through the heat medium circulation path is subjected to heat exchange with the working medium flowing through the working medium tree path,
The power generation system according to claim 11, wherein a boiling point of the working medium is lower than a boiling point of the heating medium. An inverter that converts the electric power of the power storage device from direct current to alternating current,
Further comprising a power supply switching switch that switches power supply to the electric heating device between the power storage device and a commercial power supply that supplements power from the power storage device,
The power generation system according to claim 10, wherein the electric heating device heats at least one of the second passage and the second catalyst by induction heating. A dehydrogenation reactor including a second passage provided with a second catalyst for accelerating the dehydrogenation reaction of organic hydride, and a second discharge extending from the second passage to the outside of the dehydrogenation reactor and connected to a gas-liquid separator In a dehydrogenation system having a pipe, an electric heating device that warms at least one of the second passage and the second catalyst, a heat exchange unit that cools the second discharge pipe, and a heat obtained by the heat exchange unit A method of controlling a power generation system having a power generator for generating power and a power storage device for storing the power obtained by the power generator,
In order to activate the dehydrogenation reaction inside the second passage, the heat medium circulation path is set so 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 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 flowing in the heat medium circulation path is set to a second flow rate that is higher than the first flow rate per unit time. A fourth step in which the pump of the circulation path is controlled, the electric heating device is stopped, and the power storage device is charged.

Images