JP2014098384A - Heat storage power generation system and method for controlling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat storage power generation system with a heat storage tank, having lower manufacturing cost and improved power generation efficiency, and available as an independent main power source, and to provide a method for controlling the heat storage power generation system.SOLUTION: A heat storage power generation system includes a structure for a power generation control of generating power by supplying heat energy obtained in a power-generation-usage heat receiving part 3S to a power generation system 5 via a power-generation-usage heat medium in a power-generation-usage heat medium circuit 4S, and a structure for a heat storage control of storing heat by supplying heat energy obtained in a heat-storage-usage heat receiving part 3A to a heat storage tank 6 via a heat-storage-usage heat medium in a heat-storage-usage heat medium circuit 4A, when the heat energy is obtained in the power-generation-usage heat receiving part 3S in the extent of more than a rating output of the power generation system 5.

Description

  The present invention relates to a heat storage power generation apparatus having a heat medium circuit for circulating a heat medium from a heat source to the power generation apparatus, and a control method thereof.

  Conventionally, a heat storage tank that stores exhaust heat of a heat source such as a fuel cell has been used (see, for example, Patent Document 1). FIG. 7 shows an example of a system in which a heat storage tank is added to a fuel cell used in a general household. A system 1X using this heat storage tank is connected with a heat source 2X such as a fuel cell, a load device 21 such as an electric appliance connected to the fuel cell or the like with an electric wire, and a pipe or the like so as to receive heat supply from the heat source 2X. And a heater 22 such as a domestic water heater configured to receive heat supply from the heat storage tank 6X. Further, valves 23a and 23b for controlling the movement of the heat medium are respectively installed on the heat source 2X side and the heater 22 side of the heat storage tank 6X.

  Next, the operation of the system 1X will be described. First, electricity generated by a fuel cell or the like is supplied to a load device 21 such as an electric appliance. At the same time, the heat generated from the heat source 2X such as a fuel cell is stored in the heat storage tank 6X. At this time, the valve 23a on the heat source 2X side of the heat storage tank 6X is opened, and the valve 23b on the opposite side is closed (heat storage control).

  Moreover, the heat stored in the heat storage tank 6X is supplied to a heater 22 such as a domestic water heater as needed. At this time, the valve 23b on the heater 22 side of the heat storage tank 6X is opened, and the valve 23a on the opposite side is closed (heat radiation control). With this configuration, heat generated during power generation from a fuel cell or the like can be recovered and used efficiently.

  FIG. 8 shows an example of a system in which a heat storage tank is added to a power generation apparatus such as a factory. Here, in a factory or the like, heat generated from a boiler or the like, or factory exhaust heat such as boiler and engine exhaust gas can be used as a heat source. The heat storage power generation apparatus 1Y to which this heat storage tank is added receives a heat supply from the heat source 2Y such as a boiler or a diesel generator, a heat storage tank 6Y connected to receive heat supply from the heat source 2Y, and heat supply from the heat storage tank 6Y. It has the steam turbine 11Y comprised in this way.

  Next, the operation of the heat storage power generation apparatus 1Y will be described. The heat generated from the heat source 2Y such as a boiler is stored in the heat storage tank 6Y. At this time, the valve 23a on the heat source 2Y side of the heat storage tank 6Y is opened, and the opposite valve 23b is closed (heat storage control).

  Moreover, the heat stored in the heat storage tank 6Y is supplied to the steam turbine 11Y as necessary. At this time, the valve 23b on the steam turbine 11Y side of the heat storage tank 6Y is opened, and the valve 23a on the opposite side is closed (heat radiation control). With this configuration, the waste heat from the factory is efficiently used to generate power with the steam turbine 11Y, and power can be supplied to the factory. In particular, since heat stored in the heat storage tank 6Y can be converted into electric power, the heat storage power generation apparatus 1Y can be used in any factory.

  However, the heat storage power generation apparatus 1Y having the heat storage tank has several problems. 1stly, when using a thermal storage tank in a factory etc., there exists a problem that a steam turbine cannot be used as a main independent power supply. This is because the factory exhaust heat is secondary and the amount of energy is not stable. Moreover, it is because a heat storage tank cannot perform heat storage control and heat dissipation control simultaneously. Therefore, the steam turbine cannot receive the supply of water vapor, and a time during which power generation cannot be performed occurs.

  Secondly, it is difficult to improve the power generation efficiency of the steam turbine. This is because the energy amount of factory exhaust heat is not stable, and it is difficult to select the power generation capacity of the steam turbine that is optimal for this energy amount. In addition, when excessive heat energy exceeding the capacity of the heat storage tank is generated due to a rapid fluctuation of heat generated from the heat source, this heat energy must be discarded.

  Thirdly, the steam turbine has the problem of low cost effectiveness. This is because the operating rate of the steam turbine is low.

  From the above, it has been difficult to realize a main independent power source using factory exhaust heat or the like. In other words, commercial power sources, diesel generators, etc. were used as the main power generators, and waste heat utilization etc. could not be considered as an additional position.

JP 2004-150773 A

  The present invention has been made in view of the above problems, and its purpose is to improve the power generation efficiency while suppressing the manufacturing cost in a heat storage power generation apparatus having a heat storage tank, and use it as a main independent power supply. An object of the present invention is to provide a possible heat storage power generation apparatus and a control method thereof.

  In order to achieve the above object, a heat storage power generation apparatus according to the present invention includes a heat storage tank that stores heat of a heat source, and a heat storage circuit that circulates a heat medium from the heat source to the power generation apparatus. The power generation device has a power generation heat medium circuit and a heat storage heat medium circuit that are independent of each other, and the power generation heat medium circuit is configured so that the power generation heat medium circulates; A heat-generating device that converts heat energy of the heat-generating heat medium into electricity, and the heat-storage heat-medium circuit is configured to circulate the heat-storage heat medium; It has at least 1 heat storage tank which supplies a heat medium and transfers heat.

  With this configuration, the heat storage power generation device can be used as a main independent power source. This is because even when heat energy such as sufficient factory exhaust heat cannot be obtained, power can be stably generated using the heat energy of the heat storage tank.

  Moreover, the power generation efficiency of the heat storage power generation apparatus can be improved. This is because the heat energy that has conventionally been discarded as surplus heat energy can be supplied to the power generation device and the heat storage tank, respectively, and can be used in parallel.

  In the above-described heat storage power generation apparatus, the heat storage heat medium circuit is formed on the upstream side of the heat exchanger that moves the heat energy of the heat storage heat medium to the heat generation medium, and the heat storage tank and the heat exchanger. And a low temperature side circuit formed on the downstream side of the heat storage tank and the heat exchanger, and the low temperature side circuit is provided on the downstream side of the heat storage tank and the heat exchanger, respectively. It has a flow control valve.

With this configuration, the manufacturing cost of the heat storage power generation device can be suppressed. This is because the flow rate of the heat storage heat medium passing through the heat storage tank can be controlled by the flow rate control valve. If this flow control valve is not installed, a large and high-cost switching valve or flow control valve for controlling the flow of the heat storage heat medium must be installed in the high-temperature circuit. This high temperature side valve is costly due to severe requirements such as heat resistance.

  In the above-described heat storage power generation apparatus, the low temperature side circuit has a three-way valve installed on the downstream side of the heat storage tank, and the three-way valve flows through the low temperature side circuit by switching control. The medium is configured to flow from the downstream side to the upstream side of the heat storage tank.

  With this configuration, the manufacturing cost of the heat storage power generation device can be suppressed. This is because the three-way valve can easily extract heat energy from the heat storage tank and transfer the heat energy to the heat exchanger via the high temperature side circuit. Moreover, the structure which installs a three-way valve for every heat storage tank can perform control which selects arbitrarily the heat storage tank which performs heat storage, and the heat storage tank which performs heat dissipation.

  In the above heat storage power generation apparatus, the heat storage heat medium is air. With this configuration, the manufacturing cost of the heat storage power generation device can be suppressed. This is because, for example, the internal pressure of the heat storage heat medium circuit and the heat storage tank can be reduced to a low pressure (about atmospheric pressure) as compared with the case where the heat medium is steam. When the power generation device is a steam turbine, it is desirable that the heat generating medium be steam. This is because, with this configuration, the steam generated by the heat of the heat receiving portion for power generation and the heat storage tank can be directly supplied to the power generation device, and the thermal efficiency can be maintained.

  In the above-described heat storage power generation device, the heat storage power generation device has a control device, and the control device transfers the heat storage medium from the heat storage tank to the heat generation medium via the heat storage heat medium and the heat exchanger. It has the structure which performs the thermal storage electric power generation control which transmits thermal energy and generates electric power with the said electric power generating apparatus using the said thermal energy.

  With this configuration, the manufacturing cost of the heat storage power generation device can be suppressed. This is because the power generation device connected to the power generation heat medium circuit can be used when generating power with the heat energy of the heat storage tank. Moreover, even if it is a case where thermal energy such as sufficient factory exhaust heat cannot be obtained, the heat storage power generation apparatus can stably generate power. This is because power generation can be performed using the thermal energy of the heat storage tank by the heat storage power generation control.

  In order to achieve the above object, a method for controlling a heat storage power generator according to the present invention includes a heat storage tank that stores heat from a heat source, and a heat storage power generator that includes a heat medium circuit that circulates a heat medium from the heat source to the power generator. And the heat storage power generation device has a power generation heat medium circuit and a heat storage heat medium circuit independent from each other, and the power generation heat medium circuit is configured to circulate the power generation heat medium. A heat receiving section, and a power generating device that converts the heat energy of the power generating heat medium into electricity, and the heat storage heat medium circuit is configured to circulate the heat storage heat medium; , A method for controlling a heat storage power generation device having at least one heat storage tank for supplying and receiving heat by supplying the heat storage heat storage medium, wherein the power generation device is supplied from the heat source to the power generation device via the power generation heat medium circuit. A power generation step that controls power generation by supplying a heat medium for power generation, and A heat storage step of supplying heat storage heat medium to the heat storage tank from the heat source via the heat storage heat medium circuit and performing heat storage control; and from the heat storage tank to the heat generating medium via the heat storage heat medium. It has a thermal storage power generation step of performing thermal storage power generation control for transmitting thermal energy and generating electric power with the power generator using the thermal energy. With this configuration, the same effects as described above can be obtained.

  In the control method for the heat storage power generation apparatus, when the power generation step is executed, the heat storage power generation step is executed simultaneously so that at least one of the plurality of heat storage tanks dissipates heat.

With this configuration, even if the amount of heat energy supplied from a heat source such as factory exhaust heat fluctuates, the power generation amount can be maintained constant. This is because the heat energy radiated from the heat storage tank functions as a buffer and is supplied to the heat generating medium so as to compensate for the insufficient heat energy.

  According to the thermal storage power generation apparatus and the control method thereof according to the present invention, it is possible to provide a thermal storage power generation apparatus that can be used as a main independent power source and a control method thereof that improve power generation efficiency while suppressing manufacturing costs. .

It is the figure which showed the outline of the thermal storage power generation apparatus of embodiment which concerns on this invention. It is the figure which showed the outline of the thermal storage power generation apparatus of embodiment which concerns on this invention. It is the figure which showed the relationship between the variation | change_quantity of the energy in a thermal storage power generation apparatus, and time. It is the figure which showed the outline of the different control of the thermal storage power generation apparatus of embodiment which concerns on this invention. It is the figure which showed the outline of the different control of the thermal storage power generation apparatus of embodiment which concerns on this invention. It is the figure which showed the example from which the relationship between the variation | change_quantity of the energy in a thermal storage power generation apparatus and time differs. It is the figure which showed an example of the system which added the conventional heat storage tank. It is the figure which showed the different example of the system which added the conventional heat storage tank.

  Hereinafter, a thermal storage power generation apparatus and a control method thereof according to embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the outline of the thermal storage power generation apparatus of embodiment which concerns on this invention is shown. The heat storage power generation device 1 includes a power generation heat medium circuit 4S and a heat storage heat medium circuit 4A that are independent of each other.

  The power generation heat medium circuit 4S receives heat from the heat source 2 and converts the heat energy of the power generation heat medium into electricity, and the heat generation heat receiving part 3S configured to circulate the power generation heat medium (for example, water vapor). A power generation device 5 is provided. When the power generation heat medium is steam, the power generation device 5 includes a steam turbine 11 and a generator 12. The power generation heat medium circuit 4S is configured to circulate a power generation heat medium such as steam heated by the power generation heat receiving unit 3S through the power generation device 5 and return it to the power generation heat receiving unit 3S again.

  The heat storage heat medium circuit 4A receives heat from the heat source 2 and supplies a heat storage heat receiving part 3A configured to circulate a heat storage heat medium (for example, air), and transfers heat by supplying the heat storage heat medium. It has the 1st heat storage tank 6a, the 2nd heat storage tank 6b, and the 3rd heat storage tank 6c (henceforth the heat storage tank 6 is named generically) to perform. The heat storage heat medium circuit 4A includes a heat exchanger 7 that moves the heat energy of the heat storage heat medium such as air to the power generation heat medium. Here, when the heat storage heat medium is a gas such as air, it is desirable to install a blower 13 for sending the air or the like to the heat storage heat receiving portion 3A.

  The heat storage heat medium circuit 4A is configured to circulate a heat storage heat medium such as air heated by the heat storage heat receiving section 3A through the heat storage tank 6 and the heat exchanger 7 and return it to the heat storage heat receiving section 3A again. ing. Here, in the heat storage heat medium circuit 4A, the upstream circuit of the heat storage tank 6 and the heat exchanger 7 is particularly called a high-temperature circuit, and the downstream circuit of the heat storage tank 6 and the heat exchanger 7 is particularly a low-temperature circuit. I will call it. This low temperature side circuit has flow control valves 14 installed on the downstream sides of the respective heat storage tanks 6 and the heat exchanger 7. Moreover, the low temperature side circuit has the three-way valve 15 installed in the downstream of each heat storage tank 6, respectively. Furthermore, the thermal storage power generation apparatus 1 has a control device 8 for controlling the flow rate control valve 14, the three-way valve 15, and the like. The alternate long and short dash line indicates a signal line. Of the flow control valve 14 and the three-way valve 15, those that are closed are shown in black.

  Next, the operation of the heat storage power generator 1 will be described. First, an operation when heat energy is sufficiently supplied to the heat storage power generation apparatus 1 from a heat source such as factory exhaust heat will be described. In the power generation heat medium circuit 4 </ b> S, a power generation heat medium (which will be described below using steam as an example) is heated to, for example, about 100 to 850 ° C. in the power generation heat receiving unit 3 </ b> S and sent to the steam turbine 11. The water vapor that has passed through the steam turbine 11 is sent again to the heat receiving portion 3S for power generation. While repeating the above, the power generating heat medium circuit 4S performs power generation (power generation control or power generation step).

  On the other hand, in the heat storage heat medium circuit 4 </ b> A, a heat storage heat medium (hereinafter, air will be described as an example) is heated to, for example, about 100 to 850 ° C. in the heat storage heat receiving portion 3 </ b> A and sent to the heat storage tank 6. The air that has been deprived of heat in the heat storage tank 6 and has reached about 60 to 200 ° C. is sent again to the heat storage heat receiving portion 3A. At this time, since the heat exchanger 7 is not used, the flow control valve 14 installed in the low temperature side circuit (downstream side) of the heat exchanger 7 is closed. While repeating the above, the heat storage heat medium circuit 4A accumulates thermal energy in the heat storage tank 6 (heat storage control or heat storage step). Here, the heat storage power generation apparatus 1 performs power generation control and heat storage control simultaneously.

  Next, an operation when heat energy is not sufficiently supplied to the heat storage power generation apparatus 1 from a heat source such as factory exhaust heat will be described with reference to FIG. At this time, the heat receiving portion 3 </ b> S for power generation and the heat receiving portion 3 </ b> A for heat storage cannot receive sufficient heat energy from the heat source 2. In the heat storage heat medium circuit 4 </ b> A, air is sent from the downstream side (downward in FIG. 2) to the upstream side of the heat storage tank 6 by switching the three-way valve 15. The air heated to about 100 to 850 ° C. by receiving heat from the heat storage tank 6 is sent to the heat exchanger 7. The air deprived of heat by the heat exchanger 7 is sent to the heat storage tank 6 again. In addition, the flow control valve 14 installed between the blower 13 and the heat receiving heat receiving part 3A is closed. The flow control valve 14 and the three-way valve 15 are controlled to be opened and closed by the control device 8.

On the other hand, in the heat generating medium circuit 4 </ b> S, the steam is heated to about 100 to 850 ° C. by the heat exchanger 7 and sent to the steam turbine 11. The steam that has passed through the steam turbine 11 is sent to the heat exchanger 7 again. While repeating the above, the power generation heat medium circuit 4S uses the thermal energy of the heat storage tank 6 to generate power with the power generation device 5 (heat storage power generation control or heat storage power generation step).
FIG. 3 shows the relationship between the amount of change in energy and time in the heat storage power generation apparatus 1. In the graph of FIG. 3, E _IN indicates the total amount of heat energy of the heat source 2 received by the heat receiving unit 3S for power generation and the heat receiving unit 3A for heat storage. The input energy E _IN is thermal energy, for example, opening starts in a factory or the like is heat starts from (8:00) from a boiler or the like which is a heat source 2, once reduced waste heat during the day off (at around 12), After that, exhaust heat is stopped from the end of work (17:00 to 19:00).

  Moreover, E0 has shown the output energy amount at the time of converting the heat energy received in the heat receiving part 3S for electric power generation into electric power by electric power generation control. This output energy amount E0 is determined by the rated output of a power generator such as a steam turbine. Furthermore, E1, E2, E3 have shown the energy amount at the time of heat-storing in the heat storage tank 6 the thermal energy received to 3A of heat storage parts by heat storage control. Here, E1 and E2 are thermal energy exceeding the rated output of the power generation device, and are heat energy that cannot be converted into electric power even if sent to the power generation device. E3 is thermal energy that is less than the rated output of the power generation device, and is thermal energy that cannot be efficiently converted into electric power even if it is sent to the power generation device. In addition, E4 indicates the amount of output energy when the heat energy stored in the heat storage tank 6 is converted into electric power by heat storage power generation control.

  In a factory or the like, exhaust heat from a plurality of devices can be combined and used as the heat source 2.

  With the above configuration, the following operational effects can be obtained. First, the heat storage power generation device 1 can be used independently as a main power plant. Even in a time zone where sufficient exhaust heat (heat energy) cannot be obtained (for example, from 12 to 13 o'clock and after 17 o'clock), it is possible to stably generate power using the heat energy stored in the heat storage tank 6. It is. Depending on the capacity of the heat storage tank 6, the heat energy stored in the heat storage tank 6 is used to stop the operation of the heat source 2 such as a boiler, but at night when power consumption is required in a factory or the like. Even if it exists, it becomes possible to supply electric power stably.

Secondly, the power generation efficiency of the heat storage power generation apparatus 1 can be dramatically improved. This is because heat energy (equivalent to E1 to E3) that has not conventionally contributed to power generation can be stored in the heat storage tank 6 and used for power generation. In particular, the power generation heat medium circuit 4S for performing power generation control and the heat storage heat medium circuit 4A for performing heat storage control are formed as independent circuits, so that only the surplus energy E1, E2 is exerted without affecting the power generation control. It becomes possible to execute heat storage control using. Further, heat storage tank 6 may be a small 17 o'clock of the input energy E _IN of the heat source 2, it can be accumulated to recover the energy E3.

  3rdly, the manufacturing cost of the thermal storage power generation apparatus 1 can be suppressed. This is because the flow rate of air passing through the heat storage tank 6 can be controlled by the configuration in which the flow rate control valve 14 is installed. When this flow control valve 14 is not installed, it is necessary to install a switching valve such as a large and high cost damper or a flow control valve for controlling the flow of the heat storage heat medium in the high temperature side circuit. . Specifically, when the heat storage heat medium is gas, the volume expands greatly depending on the temperature. Therefore, the tube diameter of the high-temperature circuit is larger than the tube diameter of the low-temperature circuit, and the required valve It becomes large and expensive.

  In addition, it can also be set as the structure which does not install the heat exchanger 7 between the heat medium circuit 4S for electric power generation, and the heat medium circuit 4A for heat storage. Even with this configuration, the power from the input energy (equivalent to E1 to E3) of the heat source 2 that did not contribute to power generation, such as thermal energy exceeding the rating of the power generation device such as a steam turbine, thermal energy that is not sufficient for the rating, etc. Can be recovered. However, in this case, it is necessary to separately install a power generation device in the heat storage heat medium circuit 4A, and the manufacturing cost of the heat storage power generation device 1 increases.

  Moreover, the heat storage tank 6 should just be installed at least one. The heat storage tank 6 may be filled with a liquid such as water as a heat storage material, but it is desirable to use a solid heat storage material. Specifically, ceramic, concrete, or the like can be formed into a spherical shape, a particle shape, or a lump shape, and filled into the heat storage tank 6.

  Furthermore, as the heat storage heat medium, an existing liquid and gas can be used, but preferably air. This is because the internal pressure of the heat storage heat medium circuit 4A and the heat storage tank 6 can be set to a low pressure (about atmospheric pressure) by this configuration, and the manufacturing cost of the heat storage power generation apparatus 1 can be suppressed.

  In addition, the heat medium for power generation can use existing liquids and gases, but is preferably water vapor. This is because, with this configuration, the steam generated by the power generation heat receiving portion 3S and the heat exchanger 7 can be directly supplied to the steam turbine 11 of the power generation device 5 to maintain thermal efficiency.

  In addition, the power generation device 5 can be appropriately selected in consideration of the properties of the heat generating medium. Specifically, in addition to the steam turbine, a micro turbine, a water turbine, or the like may be used.

In FIG. 4, the outline of the different control method in case heat energy is fully supplied from the heat source 2 to the thermal storage electric power generating apparatus 1 is shown. As shown in FIG. 4, the heat storage heat medium circuit 4 </ b> A includes some heat storage tanks 6 a and 6.
The air heated by the heat storage heat receiving part 3A is sent to b to perform heat storage control, and at the same time, the air heated in a part of the heat storage tank 6c is sent to the heat exchanger 7, and this heat generates heat medium circuit 4S for power generation. Heat storage power generation control is performed to heat the water vapor and generate power (buffer control). The heat storage power generation apparatus 1 that performs this buffer control has at least two heat storage tanks 6. As in the case shown in FIG. 1, the power generation heat medium circuit 4 </ b> S sends the steam heated by the power generation heat receiving portion 3 </ b> S to the power generation device 5 to perform power generation control.

  In addition, when the heat energy is not sufficiently supplied from the heat source 2 to the heat storage power generator 1, the flow control valve 14 and the three-way valve 15 are controlled by the control device 8 as shown in FIG. Do. At this time, when the heat energy from the heat source 2 is sufficiently supplied, the flow control valve 14 may be closed so that the heat storage heat medium does not flow into the heat storage tank 6c that has released the heat energy. desirable.

FIG. 6 shows the relationship between the amount of change in energy and time in the heat storage power generation apparatus 1 using the above-described buffer control. In the graph of FIG. 6, E _IN indicates the total amount of heat energy of the heat source 2 received by the heat receiving unit 3S for power generation and the heat receiving unit 3A for heat storage. The input energy E _IN, depending the operating conditions of a plurality of heating appliances as 2, can vary sharply in a short time.

By variation of the input energy E _IN, the amount of energy such as steam flowing in the power generating heat medium circuit 4S varies, output energy amount E0 by the power generation device 5 may vary. However, by performing the buffer control described above, when the amount of energy such as water vapor in the heat generating medium circuit 4S is insufficient, heat energy can be supplied from the heat storage tank 6 to water vapor or the like. That is, the amount of power generated by the power generation device 5 can be kept constant by the buffer control even if there is a change in the operating status of the equipment that is the heat source 2. Here, by the buffer control, the heat energy released from the heat storage tank 6 is not particularly controlled in its release timing or the like, and is configured to be always released to the heat storage heat medium circuit 4A. With this configuration, even momentary fluctuations in the input energy E _IN occurs, power generating apparatus 5 can maintain the power generation amount constant.

  In addition, by adopting buffer control, it is possible to adopt a device with a large rated output when selecting the power generation device 5. This is because stable heat energy can be supplied to the power generation device 5.

  In addition, the thermal storage power generation apparatus 1 that performs buffer control can easily extract thermal energy from the thermal storage tank 6 and transmit the thermal energy to the heat exchanger 7 through the high-temperature circuit by the configuration in which the three-way valve 15 is installed. it can. Moreover, the structure which installs the three-way valve 15 for every heat storage tank 6 can perform control which arbitrarily selects the heat storage tank 6 which stores heat, and the heat storage tank 6 which performs heat dissipation.

DESCRIPTION OF SYMBOLS 1 Heat storage power generator 2 Heat source 3S Heat receiving part 3A Heat receiving part 4S Heat receiving part 4S Heat generating medium circuit 4A Heat storing heat medium circuit 5 Power generating unit 6, 6a, 6b, 6c Heat storage tank 7 Heat exchanger 8 Control unit 11 Steam turbine 12 Generator 14 Flow control valve 15 Three-way valve

Claims (3)

In a heat storage power generation apparatus having a heat storage tank for storing heat of a heat source and a heat medium circuit for circulating a heat medium from the heat source to the power generation apparatus,
The heat storage power generation device has a power generation heat medium circuit and a heat storage heat medium circuit independent from each other, and a control device ,
The power generation heat medium circuit has a power generation heat receiving portion through which the power generation heat medium circulates, and a power generation device that converts heat energy of the power generation heat medium into electricity,
The heat storage heat medium circuit includes a heat storage heat receiving portion through which the heat storage heat medium circulates, at least one heat storage tank that supplies the heat storage heat medium and transfers heat, and heat energy of the heat storage heat medium And a heat exchanger that transmits the heat to the power generation heat medium,
The control device of the heat storage power generation device,
A configuration for performing power generation control for generating heat by supplying the heat energy obtained in the heat receiving portion for power generation to the power generation device via the heat generation medium of the power generation heat medium circuit;
In the case where thermal energy exceeding the rated output of the power generation device can be obtained at the heat receiving portion for power generation, the heat storage obtained by the heat receiving portion for heat storage is stored in the heat storage heat medium via the heat storage heat medium of the heat storage heat medium circuit. It has the structure which performs the thermal storage control which supplies and heat-stores a tank, The thermal storage power generation apparatus characterized by the above-mentioned. The control device is
When only the heat energy lower than the rated output of the power generation device can be obtained at the heat receiving portion for power generation, the heat energy obtained at the heat receiving portion for heat storage is transmitted through the heat storage heat medium of the heat storage heat medium circuit. The thermal storage power generation apparatus according to claim 1, wherein the thermal storage power generation apparatus has a configuration for performing thermal storage control to supply heat to a thermal storage tank . The heat storage heat medium circuit has at least two heat storage tanks;
During the power generation control, the control device constantly supplies thermal energy from at least one heat storage tank to the power generation heat medium via the heat exchanger and is supplied to the power generation device. The heat storage power generator according to claim 1, wherein the heat storage power generator has a configuration that performs buffer control to maintain constant thermal energy .

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