Peak shaving power station system

Abstract

The invention relates to a peak shaving power station system which comprises a fuel cell power supply unit and a physical energy storage power supply unit, a first air supply source communicates with a first heat exchanger tube pass through a compressor, the first heat exchanger tube pass selectively communicates with an air storage chamber, and a heat supply outlet communicates with a heat supply inlet through a first heat exchanger shell pass. The gas storage chamber selectively communicates with the second heat exchanger tube pass, the second heat exchanger tube pass communicates with the expansion machine, the expansion machine is in transmission connection with the generator, a heat storage channel and a heat release channel of the solid heat storage device penetrate through the heat storage body, and an outlet of the fuel cell communicates with the heat storage channel. The tube pass and the shell pass of the third heat exchanger communicate with the heat release channel and the shell pass of the second heat exchanger correspondingly, the power device is arranged between the third heat exchanger and the heat release channel, and the gas storage chamber communicates with the tube pass of the first heat exchanger or the tube pass of the second heat exchanger in the valley electricity period and the peak electricity period. The expansion temperature of the gas in the power generation process can be increased, so that the power generation efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of energy utilization, and in particular, to a peak-shaving power station system. Background Art

[0002] Existing energy storage methods mainly include chemical energy storage and physical energy storage. Chemical energy storage is a method of generating and storing electrical energy using chemical reactions, while physical energy storage is a method of storing energy using physical methods such as pumping, compressed air or flywheels. Therefore, compared with chemical energy storage, physical energy storage is more environmentally friendly and is gradually being widely used. However, it is currently found that the physical energy storage peak-shaving power station using physical energy storage has a low heat storage temperature during the gas storage process, resulting in a low gas expansion temperature during the power generation process, and the overall power generation efficiency is not high. Summary of the invention

[0003] The purpose of the present disclosure is to provide a peak-shaving power plant system, which can increase the expansion temperature of gas during power generation, thereby improving power generation efficiency.

[0004] In order to achieve the above-mentioned objectives, the present disclosure provides a peak-shaving power station system, the peak-shaving power station system includes a fuel cell power supply unit and a physical energy storage power supply unit, the physical energy storage power supply unit includes an air storage chamber, an air storage heat release module and an air discharge heat absorption module, the air storage heat release module includes a compressor, a first heat exchanger, a first air supply source, and a heat supply inlet for supplying heat to heat users and a heat supply outlet from heat users, the first air supply source is connected to the pipe side of the first heat exchanger through the compressor, the pipe side of the first heat exchanger can be selectively connected to the air storage chamber, the heat supply outlet is connected to the heat supply inlet through the shell side of the first heat exchanger, the air discharge heat absorption module includes an expander, a second heat exchanger and a generator, the air storage chamber can be selectively connected to the pipe side of the second heat exchanger, the pipe side of the second heat exchanger is connected to the expander, the expander is connected to the generator The fuel cell power supply unit comprises a fuel cell, a solid heat storage device, a third heat exchanger and a power device. The solid heat storage device comprises a heat storage body, a heat storage channel and a heat release channel. The heat storage channel and the heat release channel are independent of each other and are respectively arranged through the heat storage body. The outlet of the fuel cell is connected with the heat storage channel, the tube side of the third heat exchanger is connected with the heat release channel, the shell side of the third heat exchanger is connected with the shell side of the second heat exchanger, and the power device is arranged between the third heat exchanger and the heat release channel. The peak-shaving power station system has a valley power period and a peak power period. During the valley power period, the gas storage chamber is connected with the tube side of the first heat exchanger and disconnected from the tube side of the second heat exchanger; during the peak power period, the gas storage chamber is disconnected from the tube side of the first heat exchanger and connected with the tube side of the second heat exchanger.

[0005] Optionally, the fuel cell power supply unit also includes a burner and a second gas supply source, the burner includes a first gas inlet, a second gas inlet and an exhaust gas outlet, the first gas inlet is connected to the second gas supply source, the second gas inlet and the exhaust gas outlet are respectively connected to the outlet of the fuel cell and the heat storage channel.

[0006] Optionally, the fuel cell power supply unit also includes a third gas supply source and a fourth heat exchanger, the third gas supply source is connected to the inlet of the anode chamber of the fuel cell through the tube side of the fourth heat exchanger, and the shell side of the fourth heat exchanger is connected to the exhaust gas outlet.

[0007] Optionally, the fuel cell power supply unit also includes a fourth gas supply source and a fifth heat exchanger, the fourth gas supply source is connected to the inlet of the cathode chamber of the fuel cell through the tube side of the fifth heat exchanger, and the shell side of the fifth heat exchanger is connected to the exhaust gas outlet.

[0008] Optionally, the gas storage and heat release module further includes a heat medium storage device, and the heat medium storage device is disposed between the first heat exchanger and the heat supply inlet and is respectively connected to the two.

[0009] Optionally, the gas storage and heat release module further includes a cold medium storage device, and the cold medium storage device is disposed between the heat supply outlet and the first heat exchanger and is communicated with both of them respectively.

[0010] Optionally, the heat storage channel includes a heat storage inlet and a heat storage outlet, the heat release channel includes a heat release inlet and a heat release outlet, and the solid heat storage device has a heat storage process and a heat release process. In the heat storage process, the heat storage inlet and the heat storage outlet are opened, and the heat release inlet and the heat release outlet are closed; in the heat release process, the heat storage inlet and the heat storage outlet are closed, and the heat release inlet and the heat release outlet are opened; wherein the heat storage process and the heat release process are performed synchronously or sequentially.

[0011] Optionally, the heat exchange medium flowing through the heat release channel is water, the power device is configured as a water pump, and the heat release channel is configured as a metal channel set through the heat storage body; or, the heat exchange medium flowing through the heat release channel is heat exchange oil, the power device is configured as an oil pump, and the heat release channel is configured as a metal channel set through the heat storage body.

[0012] Optionally, the heat exchange medium flowing through the heat release channel is heat exchange gas, the power device is configured as a fan, and the heat release channel is formed by the heat storage body.

[0013] Optionally, the heat storage channel and the heat release channel are perpendicular to each other in space.

[0014] Through the above technical solution, in the peak-shaving power station system provided by the present disclosure, during the off-peak period, the air storage chamber is connected to the pipe side of the first heat exchanger and is disconnected from the pipe side of the second heat exchanger, so that the air introduced from the first air supply source can be compressed by the compressor to obtain compressed gas. Since the compressed gas releases heat energy during the compression process, the compressed gas can exchange heat with the cold first heat exchange medium entering the first heat exchanger from the heat supply outlet when passing through the first heat exchanger. The compressed gas after heat exchange is stored in the air storage chamber. At the same time, the first heat exchange medium after heat exchange is introduced into the heat user through the heat supply inlet. In this way, during the off-peak period, the peak-shaving power station system can use the off-peak electricity to compress the air and store it in the air storage chamber, and at the same time, use the heat energy released during the air compression process to meet the heating needs of the heat users.

[0015] During the peak power period, the gas storage chamber is disconnected from the tube side of the first heat exchanger and connected to the tube side of the second heat exchanger, so that the compressed gas in the gas storage chamber will exchange heat with the second heat exchange medium from the third heat exchanger when entering the second heat exchanger. The temperature of the compressed gas after heat exchange rises and enters the expander to expand and do work, thereby driving the generator to generate electricity, wherein the heat energy of the second heat exchange medium used to heat the compressed gas is the heat energy of the exhaust gas discharged from the fuel cell. Specifically, the fuel cell discharges high-temperature exhaust gas, and then the high-temperature exhaust gas heats the third heat exchange medium flowing through the solid heat storage device through the solid heat storage device, and then the third heat exchange medium enters the third heat exchanger to heat the second heat exchange medium, thereby transferring the heat energy of the exhaust gas discharged by the fuel cell to the second heat exchange medium. Here, the setting of the solid heat storage device enables the physical energy storage power supply unit to flexibly allocate the heat energy of the exhaust gas from the fuel cell according to the heat demand.

[0016] Therefore, the peak-shaving power station system provided by the present disclosure can, on the one hand, utilize the surplus electric energy during the valley power period to compress the air to prepare for power generation during the subsequent peak power period. On the other hand, the less heat energy released during the air compression process can also meet the heat demand of heat users. On the other hand, the more heat energy of the exhaust gas discharged by the fuel cell can be used to meet the expansion power generation demand of the physical energy storage power supply unit during the peak power period. It can be seen that the peak-shaving power station system provided by the present disclosure can not only reasonably utilize valley power, but also reasonably utilize the heat energy released by air compression during the valley power period, and can also utilize the waste heat of the exhaust gas of the fuel cell in the fuel cell power supply unit of the entire peak-shaving power station system itself to meet the heat demand of the physical energy storage power supply unit during power generation during the peak power period. Therefore, the peak-shaving power station system disclosed in the present disclosure can improve the power generation efficiency while reasonably utilizing the heat energy generated at each stage of the power generation process.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0019] Figure 1 is a structural schematic diagram of a peak load regulating power station system disclosed in the present invention;

[0020] Figure 2 is a schematic structural diagram of a solid heat storage device in a peak load regulating power station system disclosed in the present invention;

[0021] Figure 3 It is another structural schematic diagram of the solid heat storage device in the peak-shaving power station system disclosed in the present invention.

[0022] Description of Reference Numerals

[0023] 1-physical energy storage power supply unit; 11-gas storage chamber; 12-gas storage heat release module; 121-compressor; 122-first heat exchanger; 123-first gas supply source; 124-heat supply inlet; 125-heat supply outlet; 126-heat medium storage device; 127-cold medium storage device; 13-gas release heat absorption module; 131-expander; 132-second heat exchanger; 133-generator;

[0024] 2- fuel cell power supply unit; 21- fuel cell; 22- solid heat storage device; 221- heat storage body; 222- heat storage channel; 223- heat release channel; 23- third heat exchanger; 24- power device; 25- burner; 26- fourth heat exchanger; 27- third air supply source; 28- fourth air supply source; 29- fifth heat exchanger. DETAILED DESCRIPTION

[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0026] In the present disclosure, unless otherwise specified, directional words such as "inside" and "outside" refer to "inside" and "outside" relative to the corresponding component's own contour. In addition, the terms "first", "second", "third", "fourth", "fifth", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.

[0027] The present disclosure provides a peak load regulation power station system, referring to Figures 1 to 3As shown in the figure, the peak-shaving power station system includes a fuel cell power supply unit 2 and a physical energy storage power supply unit 1. The physical energy storage power supply unit 1 includes a gas storage chamber 11, a gas storage heat release module 12 and a gas release heat absorption module 13. The gas storage heat release module 12 includes a compressor 121, a first heat exchanger 122, a first gas supply source 123, and a heat supply inlet 124 for supplying heat to heat users and a heat supply outlet 125 from heat users. The first gas supply source 123 is connected to the first heat exchanger 121 through the compressor 121. The tube side of the first heat exchanger 122 is connected to the gas storage chamber 11, the heat outlet 125 is connected to the heat inlet 124 through the shell side of the first heat exchanger 122, the exhaust heat absorption module 13 includes an expander 131, a second heat exchanger 132 and a generator 133, the gas storage chamber 11 is selectively connected to the tube side of the second heat exchanger 132, the tube side of the second heat exchanger 132 is connected to the expander 131, the expander 131 is connected to the generator 133, and the heat outlet 125 is connected to the heat inlet 124 through the shell side of the first heat exchanger 122. 3 transmission connection, the fuel cell power supply unit 2 includes a fuel cell 21, a solid heat storage device 22, a third heat exchanger 23 and a power device 24, the solid heat storage device 22 includes a heat storage body 221, a heat storage channel 222 and a heat release channel 223, the heat storage channel 222 and the heat release channel 223 are independent of each other and are respectively arranged through the heat storage body 221, the outlet of the fuel cell 21 is connected to the heat storage channel 222, the pipe side of the third heat exchanger 23 is connected to the heat release channel 2 23 is connected, the shell side of the third heat exchanger 23 is connected to the shell side of the second heat exchanger 132, the power device 24 is arranged between the third heat exchanger 23 and the heat release channel 223, and the peak-shaving power station system has a valley power period and a peak power period. During the valley power period, the gas storage chamber 11 is connected to the tube side of the first heat exchanger 122 and disconnected from the tube side of the second heat exchanger 132; during the peak power period, the gas storage chamber 11 is disconnected from the tube side of the first heat exchanger 122 and connected to the tube side of the second heat exchanger 132.

[0028] Through the above technical solution, in the peak-shaving power station system provided by the present invention, during the off-peak period, the air storage chamber 11 is connected to the pipe side of the first heat exchanger 122 and is disconnected from the pipe side of the second heat exchanger 132, so that the air introduced from the first air supply source 123 can be compressed by the compressor 121 to obtain compressed gas. Since the compressed gas releases heat energy during the compression process, the compressed gas can exchange heat with the cold first heat exchange medium entering the first heat exchanger 122 from the heat supply outlet 125 when passing through the first heat exchanger 122. The compressed gas after heat exchange is stored in the air storage chamber 11. At the same time, the first heat exchange medium after heat exchange is introduced into the heat user through the heat supply inlet 124. In this way, during the off-peak period, the peak-shaving power station system can use the off-peak electricity to compress and store the air in the air storage chamber 11, and at the same time use the heat energy released during the air compression process to meet the heating needs of the heat users.

[0029] During the peak power period, the air storage chamber 11 is disconnected from the tube side of the first heat exchanger 122 and connected to the tube side of the second heat exchanger 132, so that the compressed gas in the air storage chamber 11 will exchange heat with the second heat exchange medium from the third heat exchanger 23 when entering the second heat exchanger 132. The temperature of the compressed gas after the heat exchange increases and enters the expander 131 to expand and do work, thereby driving the generator 133 to generate electricity, wherein the heat energy of the second heat exchange medium used to heat the compressed gas is the heat energy of the exhaust gas discharged from the fuel cell 21. Specifically, the fuel cell 21 discharges high-temperature exhaust gas, and then the high-temperature exhaust gas heats the third heat exchange medium flowing through the solid heat storage device 22, and then the third heat exchange medium enters the third heat exchanger 23 to heat the second heat exchange medium, thereby transferring the heat energy of the exhaust gas discharged from the fuel cell 21 to the second heat exchange medium. Here, the provision of the solid heat storage device 22 enables the physical energy storage power supply unit 1 to flexibly allocate the thermal energy of the exhaust gas from the fuel cell 21 according to the heat demand.

[0030] Therefore, the peak-shaving power station system provided by the present disclosure can, on the one hand, utilize the surplus electric energy during the valley power period to compress the air to prepare for the subsequent power generation during the peak power period. On the other hand, the less heat energy released during the air compression process can also meet the heat demand of heat users. On the other hand, the more heat energy of the exhaust gas discharged by the fuel cell 21 can be used to meet the expansion power generation demand of the physical energy storage power supply unit 1 during the peak power period. It can be seen that the peak-shaving power station system provided by the present disclosure can not only reasonably utilize valley power, but also reasonably utilize the heat energy released by air compression during the valley power period, and can also utilize the waste heat of the exhaust gas of the fuel cell 21 in the fuel cell power supply unit 2 of the entire peak-shaving power station system itself to meet the heat demand of the physical energy storage power supply unit 1 during the peak power period. Therefore, the peak-shaving power station system disclosed in the present disclosure can improve the power generation efficiency while reasonably utilizing the heat energy generated at each stage of the power generation process.

[0031] It should be noted that the gas storage heat release module 12 and the gas discharge heat absorption module 13 of the physical energy storage power supply unit 1 in the above-mentioned peak-shaving power station system are not carried out synchronously, that is, the gas storage process and the gas discharge process are not carried out at the same time, wherein the gas storage is isothermal compression between stages, and the compressed heat energy is stored, which can provide hot water or steam for heat users, and the pressure of the gas storage is greater than or equal to 10Mpa, and the gas storage chamber 11 can be a salt cavern or a fixed pressure vessel, and when the gas is discharged, the high-temperature heat energy of the fuel cell 21 is needed to heat the gas that expands and does work, so as to realize isothermal expansion between stages, and the temperature at which the gas between stages is heated is greater than or equal to 500°C. In addition, the reaction temperature of the above-mentioned fuel cell 21 is greater than 800°C, the working efficiency is greater than 90%, and the concentration of the hydrogen gas used to pass into the anode chamber of the fuel cell 21 is greater than 90%.

[0032] In the embodiments provided in the present disclosure, reference is made to Figures 1 to 3 As shown, the fuel cell power supply unit 2 also includes a burner 25 and a second gas supply source, and the burner 25 includes a first gas inlet, a second gas inlet and an exhaust gas outlet, wherein the first gas inlet is connected to the second gas supply source, that is, the first gas inlet is fed with air, and the second gas inlet is fed with exhaust gas discharged from the fuel cell 21, that is, a mixture of unreacted anode gas and reaction products, such as a mixture of hydrogen and water vapor, and the exhaust gas and air introduced are burned in the burner 25 to obtain exhaust gas, which is introduced into the heat storage channel 222 of the solid heat storage device 22 through the exhaust gas outlet, and then the part of the exhaust gas is released and its heat energy is stored in the heat storage body 221 or directly exchanged with the third heat exchange medium in the heat release channel 223. Through such a setting, the exhaust gas discharged from the fuel cell 21 can be fully burned to avoid the unreacted anode gas directly entering other devices and causing safety hazards. Among them, the thermal efficiency of the burner 25 is greater than or equal to 90%, and is suitable for a flow range of aspect ratio.

[0033] In the embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the fuel cell power supply unit 2 also includes a third gas supply source 27 and a fourth heat exchanger 26. The third gas supply source 27 is connected to the inlet of the anode chamber of the fuel cell 21 through the tube side of the fourth heat exchanger 26, and the shell side of the fourth heat exchanger 26 is connected to the tail gas outlet of the burner 25. Through such a setting, the heat energy of another part of the tail gas discharged by the burner 25 can be used to preheat the anode gas required by the fuel cell 21 itself, so as to further make full use of the heat energy of the tail gas discharged by the burner 25. Here, the gas introduced by the third gas supply source 27 is the anode gas required by the anode chamber of the fuel cell 21. For example, the anode gas can be hydrogen. In addition, the fourth heat exchanger 26 can adopt steam-gas heat exchange, the gas flows in the tube, the steam flows outside the tube, and the fins are used on the outside of the heat exchange tube, wherein the fourth heat exchanger 26 can be made of a high temperature resistant material, such as 310S.

[0034] In the embodiments provided in the present disclosure, reference is made to Figure 1As shown, the fuel cell power supply unit 2 also includes a fourth gas supply source 28 and a fifth heat exchanger 29. The fourth gas supply source 28 is connected to the inlet of the cathode chamber of the fuel cell 21 through the tube side of the fifth heat exchanger 29, and the shell side of the fifth heat exchanger 29 is connected to the tail gas outlet of the burner 25. Through such a setting, the heat energy of another part of the tail gas discharged by the burner 25 can be used to preheat the cathode gas required by the fuel cell 21 itself, so as to further make full use of the heat energy of the tail gas discharged by the burner 25. Here, the gas introduced by the fourth gas supply source 28 is the cathode gas required by the cathode chamber of the fuel cell 21. For example, the cathode gas can be air. In addition, the fifth heat exchanger 29 can adopt gas-to-gas heat exchange, the low-pressure gas flows outside the tube, and the high-pressure gas flows inside the tube. Fins are used on the outside of the heat exchange tube, wherein the fifth heat exchanger 29 can be made of high-temperature resistant material, such as 310S.

[0035] In the embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the gas storage and heat release module 12 further includes a hot medium storage device 126 and a cold medium storage device 127. The hot medium storage device 126 is arranged between the first heat exchanger 122 and the heat supply inlet 124 and is respectively connected to the two. In this way, the heat energy of the first heat exchange medium from the first heat exchanger 122 can be stored through the hot medium storage device 126, so that the heat user can flexibly allocate according to actual needs when heating is needed later; in addition, the cold medium storage device 127 is arranged between the heat supply outlet 125 and the first heat exchanger 122 and is respectively connected to the two. Through such a setting, cold water from the heat user can be stored, so that the first heat exchange medium stored in the cold medium storage device 127 can be flexibly supplied according to the heat exchange demand of the first heat exchanger 122. Here, the hot medium storage device 126 and the cold medium storage device 127 can be constructed in any suitable manner. For example, when the first heat exchange medium is water, the hot medium storage device 126 can be a hot water tank, and the cold medium storage device 127 can be a cold water tank.

[0036] In the embodiments provided in the present disclosure, reference is made to Figure 2 and Figure 3 As shown, in order to facilitate the arrangement of the heat storage channel 222 and the heat release channel 223 in the solid heat storage device 22, the heat storage channel 222 and the heat release channel 223 can be arranged perpendicular to each other in space.

[0037] Among them, the heat storage channel 222 includes a heat storage inlet and a heat storage outlet respectively formed at opposite ends of the heat storage channel 222, and the heat release channel 223 includes a heat release inlet and a heat release outlet respectively formed at opposite ends of the heat release channel 223. The solid heat storage device 22 has a heat storage process and a heat release process. In the heat storage process, the heat storage inlet and the heat storage outlet are opened, and the heat release inlet and the heat release outlet are closed; in the heat release process, the heat storage inlet and the heat storage outlet are closed, and the heat release inlet and the heat release outlet are opened; wherein the heat storage process and the heat release process are carried out synchronously or sequentially. Through such a setting, it is possible to flexibly select whether the solid heat storage device 22 is currently in a heat storage process and a heat release process simultaneously, or in a heat storage process and a heat release process sequentially according to actual heat demand, so as to meet different usage requirements.

[0038] In the embodiment provided in the present disclosure, the heat storage channel 222 can be formed by stacking the heat storage body 221 made of heat storage material, and the heat storage temperature of the heat storage channel 222 is greater than or equal to 800°C, and the heat release channel 223 can be divided into two types according to the different heat exchange media flowing through it. One is that when the heat exchange medium flowing inside the heat release channel 223 is a liquid, such as water or oil, the heat release channel 223 is constructed as a metal pipe; the other is that when the heat exchange medium flowing inside the heat release channel 223 is a gas, such as air or an inert gas, the heat release channel 223 is stacked by the heat storage body 221 made of heat storage material. Among them, the thermal conductivity of the heat storage material is greater than or equal to 50W / mK, the temperature resistance is greater than or equal to 1200°C, and the strength is greater than 10Mpa. The power device 24 needs to be selected according to the specific heat exchange medium in the heat release channel 223. Optionally, when the heat exchange medium flowing through the heat release channel 223 is water, heat exchange oil or heat exchange gas, the power device 24 and the heat release channel 223 may have at least the following possible implementations:

[0039] In a first exemplary embodiment, the heat exchange medium flowing through the heat release channel 223 is water, the power device 24 is configured as a water pump, and the heat release channel 223 is configured as a metal channel provided through the heat storage body 221 .

[0040] In a second exemplary embodiment, the heat exchange medium flowing through the heat release channel 223 is heat exchange oil, the power device 24 is configured as an oil pump, and the heat release channel 223 is configured as a metal channel provided through the heat storage body 221 .

[0041] In a third exemplary embodiment, the heat exchange medium flowing through the heat release channel 223 is heat exchange gas, the power device 24 is configured as a fan, and the heat release channel 223 is formed by the heat storage body 221, wherein the fan can be a centrifugal fan and has a temperature resistance greater than 200°C.

[0042] In the above three exemplary embodiments, three common heat exchange media, namely air, water and oil, are selected respectively, and the circulation of the heat exchange medium between the third heat exchanger 23 and the solid heat storage device 22 is realized by combining the power device 24 corresponding to each heat exchange medium.

[0043] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0045] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A peak load regulation power station system, characterized in that: The peak-shaving power station system includes a fuel cell power supply unit and a physical energy storage power supply unit, the physical energy storage power supply unit includes a gas storage chamber, a gas storage heat release module and a gas discharge heat absorption module, the gas storage heat release module includes a compressor, a first heat exchanger, a first gas supply source, and a heat supply inlet for supplying heat to heat users and a heat supply outlet from heat users, the first gas supply source is connected to the tube side of the first heat exchanger through the compressor, the tube side of the first heat exchanger can be selectively connected to the gas storage chamber, the heat supply outlet is connected to the heat supply inlet through the shell side of the first heat exchanger, the gas discharge heat absorption module includes an expander, a second heat exchanger and a generator, the gas storage chamber can be selectively connected to the first heat exchanger, and the heat supply outlet is connected to the heat supply inlet through the shell side of the first heat exchanger. The tube side of the second heat exchanger is connected, the tube side of the second heat exchanger is connected to the expander, the expander is connected to the generator in a transmission manner, the fuel cell power supply unit includes a fuel cell, a solid heat storage device, a third heat exchanger and a power device, the solid heat storage device includes a heat storage body, a heat storage channel and a heat release channel, the heat storage channel and the heat release channel are independent of each other and are respectively arranged through the heat storage body, the outlet of the fuel cell is connected to the heat storage channel, the tube side of the third heat exchanger is connected to the heat release channel, the shell side of the third heat exchanger is connected to the shell side of the second heat exchanger, and the power device is arranged between the third heat exchanger and the heat release channel, The peak-shaving power station system has a valley power period and a peak power period. During the valley power period, the gas storage chamber is connected to the tube side of the first heat exchanger and disconnected from the tube side of the second heat exchanger. During the peak power period, the air storage chamber is disconnected from the tube side of the first heat exchanger and connected to the tube side of the second heat exchanger.

2. The peak load regulating power station system according to claim 1, characterized in that: The fuel cell power supply unit also includes a burner and a second gas supply source, the burner includes a first gas inlet, a second gas inlet and an exhaust gas outlet, the first gas inlet is connected to the second gas supply source, the second gas inlet and the exhaust gas outlet are respectively connected to the outlet of the fuel cell and the heat storage channel.

3. The peak load regulating power station system according to claim 2, characterized in that: The fuel cell power supply unit also includes a third gas supply source and a fourth heat exchanger. The third gas supply source is connected to the inlet of the anode chamber of the fuel cell through the tube side of the fourth heat exchanger, and the shell side of the fourth heat exchanger is connected to the exhaust gas outlet.

4. The peak load regulating power station system according to claim 2, characterized in that: The fuel cell power supply unit also includes a fourth gas supply source and a fifth heat exchanger. The fourth gas supply source is connected to the inlet of the cathode chamber of the fuel cell through the tube side of the fifth heat exchanger, and the shell side of the fifth heat exchanger is connected to the exhaust gas outlet.

5. The peak load regulating power station system according to claim 1, characterized in that: The gas storage and heat release module further includes a heat medium storage device, which is disposed between the first heat exchanger and the heat supply inlet and is communicated with both.

6. The peak load regulating power station system according to claim 1, characterized in that: The gas storage and heat release module further includes a cold medium storage device, which is disposed between the heat supply outlet and the first heat exchanger and is communicated with both.

7. The peak load regulating power station system according to any one of claims 1 to 6, characterized in that: The heat storage channel includes a heat storage inlet and a heat storage outlet, the heat release channel includes a heat release inlet and a heat release outlet, and the solid heat storage device has a heat storage process and a heat release process. In the heat storage process, the heat storage inlet and the heat storage outlet are opened, and the heat release inlet and the heat release outlet are closed; During the heat release process, the heat storage inlet and the heat storage outlet are closed, and the heat release inlet and the heat release outlet are opened; Wherein, the heat storage process and the heat release process are performed synchronously or sequentially.

8. The peak load regulating power station system according to any one of claims 1 to 6, characterized in that: The heat exchange medium flowing through the heat release channel is water, the power device is configured as a water pump, and the heat release channel is configured as a metal channel provided through the heat storage body; or, The heat exchange medium flowing through the heat release channel is heat exchange oil, the power device is configured as an oil pump, and the heat release channel is configured as a metal channel that penetrates the heat storage body.

9. The peak load regulating power station system according to any one of claims 1 to 6, characterized in that: The heat exchange medium flowing through the heat release channel is heat exchange gas, the power device is configured as a fan, and the heat release channel is formed by the heat storage body.

10. The peak load regulating power station system according to any one of claims 1 to 6, characterized in that: The heat storage channel and the heat release channel are perpendicular to each other in space.

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