Compressed air energy storage power generation system based on light energy heat compensation and use method of compressed air energy storage power generation system

Abstract

The invention relates to a compressed air energy storage power generation system based on light energy heat compensation, and belongs to the technical field of energy storage power generation. The system comprises a first tank body used for storing cold water and a second tank body used for storing hot water, and a cold water pipeline and a hot water pipeline are arranged between the first tank body and the second tank body in a communicating mode. The compressor unit is communicated with the gas storage unit through a high-pressure pipeline, the high-pressure pipeline is sequentially connected with the gas-water heat exchange unit and the heat dissipation unit, and the cold water pipeline is connected with the gas-water heat exchange unit; the turbine generator set is communicated with the gas storage unit through a gas supply pipeline, the gas supply pipeline is sequentially connected with the water-gas heat exchange unit and the heat compensation unit, the hot water pipeline is connected with the water-gas heat exchange unit, the heat compensation unit comprises a heat compensation bin, a heating bin and a solar photo-thermal module, the gas supply pipeline is connected with the heat compensation bin, and the heating bin is connected with the solar photo-thermal module. The device further comprises a conveying module and a plurality of heat storage blocks, and the heat storage blocks are all arranged on the conveying module.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage and power generation, and in particular relates to a compressed air energy storage and power generation system based on solar energy heat supplementation. Background Art

[0002] Compressed air energy storage is a mechanical energy storage power generation technology. At present, there are many MW-level demonstration projects connected to the grid for power generation in China. Compressed air energy storage is divided into two technical routes: non-supplementary combustion and supplementary combustion. Non-supplementary combustion compressed air energy storage uses a heat accumulator to collect the compression heat generated during the compression process in the compression stage. In the expansion stage, the compression heat collected by the heat accumulator is used to heat the high-pressure air to drive the air turbine to generate power. The entire air energy storage and energy release cycle can achieve heat self-balance. Since the heat and temperature accumulated during the compression process are limited, in order to improve the power and efficiency of the compressed air energy storage power station, the supplementary combustion compressed air energy storage technology can be used, that is, a combustion chamber is installed on the inlet side of the air turbine, and the high-temperature flue gas generated by the combustion of fuel is used to heat the compressed air. By introducing an external heat source to increase the air turbine intake temperature and enthalpy value, the power and efficiency of the compressed air energy storage power station can be improved.

[0003] In the prior art, supplementary combustion compressed air energy storage uses fossil fuels as a heat source, which has carbon emissions and environmental protection issues, and does not conform to the current green and low-carbon development theme. Therefore, it is of great significance to find a green heat source that can replace the heat of fossil fuel combustion and introduce it into the compressed air system through supplementary heat to improve the power and efficiency of compressed air energy storage power stations. At present, the relevant technology has developed a method of using solar heat to supplement compressed air. However, the heat transfer medium used in the solar thermal supplementary heat system is molten salt, which not only has the risk of volatilization, but also has the risk of easy solidification. Especially in cold areas, when there is no sunlight at night, the molten salt is more likely to solidify, which sometimes requires heating the molten salt to melt it before starting. Summary of the invention

[0004] The present invention provides a compressed air energy storage power generation system based on solar energy heat supplementation, which is used to solve the technical problems of unreasonable setting of heat source for compensating compressed air and inappropriate selection of heat-conducting medium for compensating heat energy in the current compressed air energy storage power generation system.

[0005] The present invention is implemented by the following technical solution: A compressed air energy storage power generation system based on solar energy heat supplementation, comprising:

[0006] A first tank for storing cold water and a second tank for storing hot water, a cold water pipeline being connected between the outlet of the first tank and the inlet of the second tank, and a hot water pipeline being connected between the outlet of the second tank and the inlet of the first tank;

[0007] The compressor unit is connected to the air storage unit through a high-pressure pipeline, the high-pressure pipeline is connected to the air-water heat exchange unit and the heat dissipation unit in sequence, the cold water pipeline is connected to the air-water heat exchange unit, the air-water heat exchange unit is used to transfer the heat energy of the compressed air flowing in the high-pressure pipeline to the cold water flowing in the cold water pipeline, and the heat dissipation unit is used to cool the compressed air flowing in the high-pressure pipeline;

[0008] The turbine generator set is connected to the gas storage unit through an air supply pipeline, the air supply pipeline is connected to the water-gas heat exchange unit and the supplementary heat unit in sequence, the hot water pipeline is connected to the water-gas heat exchange unit, and the water-gas heat exchange unit is used to transfer the heat energy of the hot water flowing in the hot water pipeline to the air flowing in the air supply pipeline;

[0009] The heat replenishment unit includes a heat replenishment bin, a heating bin and a solar thermal module, the air supply pipeline is connected to the heat replenishment bin, the heating bin is connected to the solar thermal module, the solar thermal module is used to collect the heat energy of sunlight and transfer the heat energy to the heating bin, the heat replenishment unit also includes a conveying module and a plurality of heat storage blocks, the plurality of heat storage blocks are placed on the conveying module, so that the conveying module is used to drive the heat storage blocks to move back and forth between the heating bin and the heat replenishment bin;

[0010] When the heat storage block is located in the heating chamber, the heat storage block is heated by the heat energy transferred from the solar thermal module;

[0011] When the heated heat storage block is located in the heat supplement bin, the heat storage block releases heat to heat the air flowing in the air supply pipeline.

[0012] Furthermore, in order to better implement the present invention, the heat storage block is a porous hollow block structure.

[0013] Furthermore, in order to better implement the present invention, it also includes:

[0014] A heat preservation chamber, used for preserving the heat storage block after being heated by the heating chamber;

[0015] The conveying module is a ring conveyor, and the heating bin, the heat preservation bin and the heat supplement bin are sequentially arranged on a conveying path of the ring conveyor.

[0016] Furthermore, in order to better implement the present invention, the heat preservation warehouse includes:

[0017] The shell has openings on both sides, and the ring conveyor is passed through the openings;

[0018] A heat-insulating layer, disposed on the outer wall of the shell;

[0019] A temperature detector is disposed in the shell, and is used to detect the temperature of the heat storage block located in the heat preservation chamber.

[0020] Furthermore, in order to better implement the present invention, the solar thermal module includes:

[0021] Concentrating reflectors and collectors used together to collect solar thermal energy;

[0022] An air intake pipe is equipped with a booster fan;

[0023] An air outlet pipe, one end of which is connected to the heating chamber;

[0024] A heating pipe is arranged between the air inlet pipe and the air outlet pipe, and the heating pipe is connected to the heat collector so as to utilize the heat collector to heat the air flowing in the heating pipe.

[0025] Further, in order to better implement the present invention, the turbine generator set includes a first generator and a second generator, the air supply pipeline includes a first air supply pipe and a second air supply pipe, and the water-gas heat exchange unit is two in number;

[0026] The first air supply pipe is arranged between the inlet of the first generator and the outlet of the air storage unit, and the first air supply pipe is connected to one of the water-gas heat exchange units;

[0027] The second air supply pipe is arranged between the outlet of the first generator and the inlet of the second generator, and the second air supply pipe is connected to another water-gas heat exchange unit;

[0028] The first air supply pipe and the second air supply pipe are both arranged through the heat supplementation chamber.

[0029] Further, in order to better implement the present invention, the compressor unit includes a first compressor and a second compressor, the high-pressure pipeline includes a first high-pressure pipe and a second high-pressure pipe, and the number of the air-water heat exchange units is two;

[0030] The first high-pressure pipe is arranged between the outlet of the first compressor and the inlet of the second compressor, and the first high-pressure pipe is connected to one of the air-water heat exchange units;

[0031] The second high-pressure pipe is arranged between the outlet of the second compressor and the inlet of the gas storage unit, and the second high-pressure pipe is connected to another gas-water heat exchange unit and the heat dissipation unit in sequence.

[0032] Furthermore, in order to better realize the present invention, the heat dissipation unit includes a cooling tower and a first heat exchanger, the cooling tower is connected to the first heat exchanger through a first water pipe, and the second high-pressure pipe is also connected to the first heat exchanger, wherein the first heat exchanger is used to transfer the heat energy of the compressed air flowing in the second high-pressure pipe to the cold water flowing in the first water pipe.

[0033] Furthermore, in order to better realize the present invention, the cooling tower is connected to the second heat exchanger through a second water pipe, the hot water pipeline is also connected to the second heat exchanger, and the second heat exchanger is located between the water-gas heat exchange unit and the first tank body, wherein the second heat exchanger is used to transfer the heat energy of the hot water flowing in the hot water pipeline to the cold water flowing in the second water pipe, so that the water entering the first tank body is cold water.

[0034] The present invention also provides a method for using the above-mentioned compressed air energy storage power generation system based on solar energy heat supplementation, comprising:

[0035] The air is compressed by a compressor unit to obtain high-temperature and high-pressure compressed air;

[0036] The compressed air from the compressor unit is transported to the air storage unit by means of a high-pressure pipeline. When the compressed air is transported in the high-pressure pipeline, it is cooled by the air-water heat exchange unit and the heat dissipation unit in sequence to form low-temperature and high-pressure compressed air. At the air-water heat exchange unit, the heat in the compressed air is transferred to the cold water flowing in the cold water pipeline, so that the temperature of the water flowing from the first tank body into the second tank body is increased;

[0037] The compressed air coming out of the air storage unit is transported to the turbine generator set by means of an air supply pipeline. When being transported in the air supply pipeline, the compressed air is heated in turn by a water-gas heat exchange unit and a supplementary heat unit to form high-temperature and high-pressure compressed air. At the water-gas heat exchange unit, the heat of the hot water flowing in the hot water pipeline is transferred to the compressed air flowing in the air supply pipeline, so that the temperature of the water flowing from the second tank body into the first tank body is reduced. The supplementary heat unit obtains heat from sunlight through a solar thermal module to heat the heat storage block placed in the heating bin and relies on the transport module to transport the heated heat storage block to the supplementary heat bin to heat the compressed air flowing in the air supply pipeline.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The compressed air energy storage power generation system based on solar energy heat supplementation provided by the present invention compresses air through a compressor unit to obtain high-temperature and high-pressure compressed air, and uses a high-pressure pipeline to transport the compressed air to the air storage unit for storage. When the compressed air is transported in the high-pressure pipeline, it is cooled and cooled by an air-water heat exchange unit and a heat dissipation unit to form low-temperature and high-pressure compressed air, so that the air entering the air storage unit is low-temperature and high-pressure compressed air. The air-water heat exchange unit transfers the heat of the compressed air to the cold water pipeline, so that the compressed air in the high-pressure pipeline is cooled, and the water in the cold water pipeline is also heated, so that the water flowing from the first tank body into the second tank body is heated, and the compressed air stored in the air storage unit is then sent to the cold water pipeline. The compressed air is transported to the turbine compressor unit through the air pipeline for power generation. Because the compressed air stored in the air storage unit is low temperature and high pressure, in order to improve the power generation efficiency, the compressed air is heated by the water-to-air heat exchange unit and the supplementary heat unit when being transported in the air pipeline to form high-temperature and high-pressure compressed air. The water-to-air heat exchange unit transfers the heat in the hot water flowing out of the second tank to the compressed air flowing in the air pipeline, thereby increasing the temperature of the compressed air flowing in the air pipeline, while the above-mentioned supplementary heat unit obtains heat from the sunlight through the solar thermal module to heat the heat storage block placed in the heating bin and relies on the transportation module to transport the heated heat storage block to the supplementary heat bin to heat the compressed air flowing in the air pipeline.

[0040] In this way, the compressed air energy storage power generation system can effectively utilize the heat of the compressed air coming out of the compressor unit, and use the heat to preliminarily heat the compressed air from the gas storage unit to the turbine generator set, which is energy-saving and environmentally friendly. Moreover, the system can also effectively utilize solar thermal energy to supplement the heat of the compressed air from the gas storage unit to the turbine generator set, so that the temperature of the compressed air entering the turbine generator set is higher, and the solar thermal energy is conducted to the air supply pipeline for conveying the compressed air through the heat storage block. The heat storage block has a high heat storage temperature, a large heat storage density, and a low heat storage cost. It has the advantages of good thermal conductivity and high thermal conductivity efficiency, and will not cause pollution to the environment. There will be no phase change during use, so it is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a structural schematic diagram of a compressed air energy storage power generation system based on solar energy heat supplementation provided in Example 1 of the present invention;

[0043] Figure 2Schematic diagram of the structure of the heat preservation bin in the embodiment of the present invention;

[0044] Figure 3 It is a flow chart of a method for using a compressed air energy storage power generation system based on solar energy heat supplementation provided in Example 2 of the present invention.

[0045] In the figure:

[0046] 1-first tank, 2-second tank, 3-cold water pipeline, 4-hot water pipeline, 5-first compressor, 6-second compressor, 7-first high-pressure pipe, 8-second high-pressure pipe, 9-gas storage unit, 10-gas-water heat exchange unit, 11-cooling tower, 12-first heat exchanger, 13-first water pipe, 14-second water pipe, 15-second heat exchanger, 16-first generator, 17-second generator, 18-first air supply pipe, 19-second air supply pipe -second air supply pipe, 20-water-gas heat exchange unit, 21-heat replenishment chamber, 22-heating chamber, 23-transport module, 24-heat storage block, 25-insulation chamber, 251-shell, 252-insulation layer, 253-temperature detector, 26-focusing reflector, 27-heat collector, 28-inlet pipe, 29-boosting fan, 30-outlet pipe, 31-heating pipe, 32-first water pump, 33-second water pump, 34-heat dissipation equipment. DETAILED DESCRIPTION

[0047] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0048] Embodiment 1:

[0049] This embodiment provides a compressed air energy storage power generation system based on solar energy supplementation. Figure 1 As shown, it includes a first tank body 1, a second tank body 2, a cold water pipeline 3, a hot water pipeline 4, a compressor unit, a high-pressure pipeline, an air storage unit 9, an air-water heat exchange unit 10, a heat dissipation unit, a turbine generator set, an air supply pipeline, a water-gas heat exchange unit 20 and a heat supplement unit, wherein:

[0050] The first tank body 1 and the second tank body 2 are both containers for storing water. Of course, heat transfer oil can also be used instead of the water. The first tank body 1 is used to store cold water, and the second tank body 2 is used to store hot water. The cold water pipeline 3 is connected and arranged between the outlet of the first tank body 1 and the inlet of the second tank body 2, so as to guide the cold water in the first tank body 1 to the second tank body 2. It is easy to understand that the first water pump 32 is installed on the cold water pipeline 3, and the first water pump 32 enables the water flow to flow in the cold water pipeline 3. The hot water pipeline 4 is connected and arranged between the inlet of the first tank body 1 and the outlet of the second tank body 2, so as to guide the hot water in the second tank body 2 to the first tank body 1. It is easy to understand that the second water pump 33 is installed on the hot water pipeline 4, and the second water pump 33 enables the water flow to flow in the hot water pipeline 4.

[0051] The compressor unit is used to compress air so that the air becomes high-temperature and high-pressure compressed air. The high-pressure pipeline is actually an air guide pipe, and the high-pressure pipeline is connected between the outlet of the compressor unit and the inlet of the air storage unit 9. The air storage unit 9 is used to store compressed air, which is the same as the prior art, so it will not be described in detail here. The above-mentioned high-pressure pipeline is connected to the air-water heat exchange unit 10 and the heat dissipation unit in sequence, and the above-mentioned cold water pipeline 3 is also connected to the air-water heat exchange unit 10. At the air-water heat exchange unit 10, the above-mentioned high-pressure pipeline is attached to the cold water pipeline 3, and part of the heat energy of the compressed air flowing in the high-pressure pipeline is transferred to the cold water flowing in the cold water pipeline 3, thereby reducing the temperature of the compressed air flowing in the high-pressure pipeline and heating the water flowing in the cold water pipeline 3, and the heated water in the cold water pipeline 3 flows into the above-mentioned second tank body 2. The temperature of the compressed air after cooling in the air-water heat exchange unit 10 is still relatively high. Therefore, the high-pressure pipeline is also connected to the heat dissipation unit, and the heat dissipation unit is used to further cool the compressed air flowing in the high-pressure pipeline, so that the compressed air finally entering the air storage unit 9 is in a low-temperature and high-pressure state, so as to meet the storage requirements of the storage unit.

[0052] The turbine generator set uses compressed air to generate electricity. Of course, the compressed air can be directly discharged into the atmosphere after coming out of the turbine generator set. The above-mentioned turbine generator set is connected to the air storage unit 9 through an air supply pipeline. Specifically, the air supply pipeline is also an air guide pipe. The air supply pipeline is connected and arranged between the outlet of the air storage unit 9 and the inlet of the turbine generator set, so as to facilitate the flow of compressed air stored in the air storage unit 9 to the turbine generator set for power generation. Since the compressed air stored in the air storage unit 9 is in a low-temperature and high-pressure state, in order to improve the power generation efficiency, the intake temperature of the turbine generator set needs to be increased. In this embodiment, the above-mentioned air supply pipeline is connected to the water-heat heat exchange unit and the supplementary heat unit in sequence, and the above-mentioned hot water pipeline 4 is also connected to the above-mentioned water-gas heat exchange unit 20. At the water-gas heat exchange unit 20, the air supply pipeline is attached to the hot water pipeline 4, so that the heat energy of the hot water flowing in the hot water pipeline 4 is transferred to the low-temperature and high-pressure compressed air flowing in the air supply pipeline, thereby preliminarily heating the compressed air flowing in the air supply pipeline, and reducing the temperature of the water flowing in the hot water pipeline 4, and the water with a lower temperature flowing in the hot water pipeline 4 enters the first tank body 1. The temperature of the compressed air preliminarily heated in the water-gas heat exchange unit 20 still needs to be further increased, and the above-mentioned supplementary heat unit connected to the air supply pipeline can further heat the compressed air in the air supply pipeline.

[0053] The above-mentioned heat replenishment unit includes a heat replenishment bin 21, a heating bin 22, a solar thermal module, a conveying module 23 and a plurality of heat storage blocks 24, so that the air supply pipeline is connected to the heat replenishment bin 21, and the heating bin 22 is connected to the solar thermal module. The solar thermal module is used to collect the heat energy of sunlight and transfer the heat energy to the heating bin 22. The above-mentioned heat storage blocks 24 are placed on the conveying module 23 in sequence to be transported with the conveying module 23. The conveying module 23 is connected to the above-mentioned heat replenishment bin 21 and the heating bin 22, so that the heat storage blocks 24 can be moved back and forth between the heating bin 22 and the heat replenishment bin 21 with the help of the conveying module 23. When the heat storage block 24 is located in the heating bin 22, the heat energy transferred to the heating bin 22 through the solar thermal module heats the heat storage block 24, so that the temperature of the heat storage block 24 increases. The heated heat storage block 24 is transported into the supplementary heat bin 21 by means of the above-mentioned transport module 23. The air supply pipeline is passed through the supplementary heat bin 21 and is in contact with the above-mentioned heat storage block 24. In this way, the high-temperature heat storage block 24 can further heat the air supply pipeline and the compressed air flowing in the air supply pipeline, thereby supplementing the compressed air in the air supply pipeline that has been preliminarily heated by the water-to-gas heat exchange unit 20, so that the temperature of the compressed air that finally enters the turbine generator set is higher.

[0054] Through the above structure, the compressed air energy storage power generation system provided in this embodiment can effectively utilize the heat of the compressed air coming out of the compressor unit, and use the heat to preliminarily heat the compressed air from the air storage unit 9 to the turbine generator set, which is energy-saving and environmentally friendly. Moreover, the system can also effectively utilize solar thermal energy to supplement the compressed air from the air storage unit 9 to the turbine generator set, so that the temperature of the compressed air entering the turbine generator set is higher, and the solar thermal energy is conducted to the air supply pipeline for conveying compressed air through the heat storage block 24. The heat storage block 24 has a high heat storage temperature, a large heat storage density, and a low heat storage cost. It has the advantages of good thermal conductivity and high thermal conductivity efficiency, and will not cause pollution to the environment. There will be no phase change during use, so it is more reasonable.

[0055] It should be noted that the gas-water heat exchange unit 10 described in this embodiment refers to the heat transfer from gas to water at the heat exchange unit, and the water-gas heat exchange unit 20 refers to the heat transfer from water to gas at the heat exchange unit.

[0056] An optional implementation of this embodiment is as follows: the heat storage block 24 is a porous hollow block structure, such a heat storage block 24 has a larger surface area and better heat storage capacity. Specifically, the heat storage block 24 can be a hollow rock, or a refractory brick, etc.

[0057] An optional implementation of the present embodiment is as follows: it also includes an insulation bin 25 for keeping the heat storage block 24 warm after being heated by the heating bin 22. The heating bin 22, the insulation bin 25 and the supplementary heat bin 21 are sequentially arranged on the conveying path of the conveying module 23. In this way, after the heat storage block 24 is heated in the heating bin 22, it is conveyed to the insulation bin 25 by the conveying module 23 for insulation, and then conveyed to the supplementary heat bin 21 by the conveying module 23 to heat the compressed air flowing in the air supply pipeline.

[0058] The setting of the heat preservation warehouse 25 can not only reduce the heat loss of the heat storage block 24 in the process of being transported from the heating warehouse 22 to the supplementary heat warehouse 21, but more importantly, the heat preservation warehouse 25 is set large enough so that the heat preservation warehouse 25 can store a large number of heated heat storage blocks 24. In this way, when there is sunlight, a large number of heat storage blocks 24 can be heated by sunlight and stored in the heat preservation warehouse 25 for standby use. On cloudy days or at night, the heat storage blocks 24 stored in the heat preservation warehouse 25 can be used to avoid the situation where the supplementary heat unit cannot work on cloudy days or at night. For example, a storage area for storing the heat storage blocks 24 is set in the heat preservation warehouse 25, and the conveying module 23 is formed next to the storage area. The excess high-temperature heat storage blocks 24 sent from the heating warehouse 22 are taken from the conveying module 23 by workers or machines and placed in the storage area for standby use. On cloudy days or at night, the stored high-temperature heat storage blocks 24 are placed on the conveying module 23 and further transported to the supplementary heat warehouse 21. It should be noted that, in order to make the drawings clearer, the heat preservation bin 25 shown in the drawings is not drawn according to the actual scale.

[0059] The above-mentioned conveying module 23 is a ring conveyor, so that the conveying module 23 can not only convey the heat storage block 24 heated by the heating bin 22 to the insulation bin 25 and convey the heat storage block 24 stored in the insulation bin 25 to the supplementary heat bin 21, but also can send the heat storage block 24 cooled by the supplementary heat bin 21 back to the heating bin 22, thereby cyclically heating and using the heat storage block 24.

[0060] Of course, the above-mentioned conveying module 23 can also be a linear conveyor. In this case, it is necessary to manually transport the cooled heat storage blocks 24 in the heat replenishment bin 21 to the conveying starting end of the conveying module 23.

[0061] Alternatively, if Figure 2 As shown, the above-mentioned heat preservation chamber 25 includes a shell 251, a heat preservation layer 252 and a temperature detector 253, wherein:

[0062] There are openings on both sides of the shell 251, and the ring conveyor is passed through the opening. The insulation layer 252 is arranged on the outer wall or the inner wall of the shell 251, and the temperature detector 253 is arranged in the shell 251. The temperature detector 253 is used to detect the temperature of the heat storage block 24 located in the insulation bin 25.

[0063] In addition, the heating chamber 22 and the heat supply chamber 21 may also have the same structure as the heat preservation chamber 25 , and the air supply pipeline passes through the shell 251 of the heat supply chamber 21 and even the interior of the heat supply chamber 21 .

[0064] An optional implementation of this embodiment is as follows: the solar thermal module includes a concentrating reflector 26, a heat collector 27, an air inlet pipe 28, an air outlet pipe 30 and a heating pipe 31, wherein:

[0065] The focusing reflector 26 and the heat collector 27 are used together to collect solar thermal energy. Both the focusing reflector 26 and the heat collector 27 are prior arts, so they will not be described in detail here.

[0066] The air inlet pipe 28 is installed with a booster fan 29. When the booster fan 29 is running, air is sent into the above-mentioned air inlet pipe 28. One end of the air outlet pipe 30 is connected with the heating chamber 22. The above-mentioned heating pipe 31 is connected and arranged between the air inlet pipe 28 and the air outlet pipe 30. The heating pipe 31 is connected to the collector 27 so that the air flowing in the heating pipe 31 can be heated by the collector 27.

[0067] In this way, the solar thermal energy collected by the collector 27 heats the air flowing in the heating tube 31, and is guided through the air outlet pipe 30, so that the heated air in the heating tube 31 enters the interior of the above-mentioned heating chamber 22 and heats the heat storage block 24 located inside the heating chamber 22.

[0068] As another optional implementation of this embodiment, in this embodiment, the heat collector 27 is directly in contact with the heat storage block 24 , so that the heat collector 27 is used to directly heat the heat storage block 24 .

[0069] An optional implementation of the present embodiment is as follows: the turbine generator set includes a first generator 16 and a second generator 17, the air supply pipeline includes a first air supply pipe 18 and a second air supply pipe 19, and there are two water-gas heat exchange units 20. The first air supply pipe 18 is connected and arranged between the inlet of the first generator 16 and the outlet of the air storage unit 9, and the first air supply pipe 18 is connected to one of the water-gas heat exchange units 20. The second air supply pipe 19 is connected and arranged between the outlet of the first generator 16 and the inlet of the second generator 17, and the second air supply pipe 19 is connected to the other water-gas heat exchange unit 20. The first air supply pipe 18 and the second air supply pipe 19 are both arranged in the heat replenishment bin 21.

[0070] The compressed air from the air storage unit 9 is directed to the first generator 16 through the first air supply pipe 18. The compressed air flowing in the first air supply pipe 18 exchanges heat with the hot water in the hot water pipeline 4 through the first water-gas heat exchange unit 20, thereby initially increasing the temperature, and then increases the temperature again after being supplemented by the above-mentioned supplementary heat unit, so that the temperature of the compressed air entering the first generator 16 is higher; the compressed air from the first generator 16 is directed to the second generator 17 through the second air supply pipe 19. The compressed air flowing in the second air supply pipe 19 exchanges heat with the hot water in the hot water pipeline 4 through the second water-gas heat exchange unit 20, thereby initially increasing the temperature, and then increases the temperature again after being supplemented by the above-mentioned supplementary heat unit, so that the temperature of the compressed air entering the second generator 17 is higher. In this way, the two generators can more effectively utilize compressed air energy to generate electricity, and the power generation efficiency is higher.

[0071] Of course, the turbine generator set can also be a generator or more generators connected in series.

[0072] An optional implementation of the present embodiment is as follows: the compressor group includes a first compressor 5 and a second compressor 6, the high-pressure pipeline includes a first high-pressure pipe 7 and a second high-pressure pipe 8, the number of the air-water heat exchange units 10 is two, the first high-pressure pipe 7 is connected and arranged between the outlet of the first compressor 5 and the inlet of the second compressor 6, the first high-pressure pipe 7 is connected to one of the air-water heat exchange units 10, the second high-pressure pipe 8 is connected and arranged between the outlet of the second compressor 6 and the inlet of the air storage unit 9, and the second high-pressure pipe 8 is connected to another air-water heat exchange unit 10 and the heat dissipation unit in sequence.

[0073] The compressed air from the first compressor 5 has a certain pressure and heat. The compressed air from the first compressor 5 is guided to the inlet of the second compressor 6 through the first high-pressure pipe 7. The compressed air flowing in the first high-pressure pipe 7 exchanges heat with the cold water flowing in the cold water pipeline 3, so that the compressed air entering the second compressor 6 has a certain pressure, but the temperature is lower; the second compressor 6 further pressurizes the compressed air to form high-pressure and high-temperature compressed air and sends it to the air storage unit 9 through the second high-pressure pipe 8. When flowing in the second high-pressure pipe 8, the high-temperature and high-pressure compressed air first exchanges heat with the cold water flowing in the cold water pipeline 3, and after preliminary cooling, it is further cooled to low temperature and high pressure in the above-mentioned heat dissipation unit. In this way, the pressure of the compressed air entering the air storage unit 9 can be made higher, so that it is more suitable for power generation by the turbine generator set.

[0074] Of course, the above compressor unit may also include more compressors connected in series.

[0075] An optional implementation of this embodiment is as follows: the above-mentioned heat dissipation unit includes a cooling tower 11 and a first heat exchanger 12. The above-mentioned cooling tower 11 is connected to the above-mentioned first heat exchanger 12 through a first water pipe 13, and the above-mentioned second high-pressure pipe 8 is also connected to the above-mentioned first heat exchanger 12. Specifically, the first water pipe 13 and the above-mentioned second high-pressure pipe 8 are attached to each other in the above-mentioned first heat exchanger 12, so that the heat energy of the compressed air flowing in the above-mentioned second high-pressure pipe 8 is transferred to the cold water flowing in the above-mentioned first water pipe 13. The first water pipe 13 then sends the water back to the cooling tower 11 for cooling, and after cooling, it is sent to the first heat exchanger 12 for circulation, so as to better cool the compressed air flowing in the above-mentioned second high-pressure pipe 8.

[0076] Of course, the heat dissipation unit may also be any other structure capable of refrigeration, such as an air conditioner, an air cooler, ice cubes, etc.

[0077] Preferably, the cooling tower 11 is connected to the second heat exchanger 15 through the second water pipe 14, the hot water pipeline 4 is also connected to the second heat exchanger 15, and the second heat exchanger 15 is located between the water-gas heat exchange unit 20 and the first tank 1. Specifically, the second water pipe 14 and the hot water pipeline 4 are attached to each other in the second heat exchanger 15, so that the heat energy of the hot water flowing in the hot water pipeline 4 is transferred to the cold water flowing in the second water pipe 14, and then the hot water flowing in the hot water tank is further reduced, ensuring that the water entering the first tank 1 is cold water, so as to facilitate the heat exchange between the water coming out of the first tank 1 and the high-pressure pipeline. After being heated, the water in the second pipeline flows back to the cooling tower 11 for cooling, and the water cooled in the cooling tower 11 flows into the second pipeline again.

[0078] Embodiment 2:

[0079] This embodiment provides a method of use, which uses the compressed air energy storage power generation system for solar energy heat supplementation described in Example 1, such as Figure 3 As shown, the method includes:

[0080] The air is compressed by a compressor unit to obtain high-temperature and high-pressure compressed air;

[0081] The compressed air from the compressor unit is transported to the air storage unit 9 by means of a high-pressure pipeline. When the compressed air is transported in the high-pressure pipeline, it is cooled by the air-water heat exchange unit 10 and the heat dissipation unit in sequence to form low-temperature and high-pressure compressed air. At the air-water heat exchange unit 10, the heat in the compressed air is transferred to the cold water flowing in the cold water pipeline 3, so that the temperature of the water flowing from the first tank body 1 to the second tank body 2 is increased;

[0082] The compressed air coming out of the air storage unit 9 is transported to the turbine generator set by means of an air supply pipeline. When the compressed air is transported in the air supply pipeline, it is heated in turn by the water-gas heat exchange unit 20 and the supplementary heat unit to form high-temperature and high-pressure compressed air. At the water-gas heat exchange unit 20, the heat of the hot water flowing in the hot water pipeline 4 is transferred to the compressed air flowing in the air supply pipeline, so that the temperature of the water flowing from the second tank body 2 into the first tank body 1 is reduced. The supplementary heat unit obtains heat from sunlight through a solar thermal module to heat the heat storage block 24 placed in the heating bin 22, and relies on the transport module 23 to transport the heated heat storage block 24 to the supplementary heat bin 21 to heat the compressed air flowing in the air supply pipeline.

[0083] When the compressor unit in this embodiment includes a first compressor 5 and a second compressor 6, the high-pressure pipeline includes a first high-pressure pipe 7 and a second high-pressure pipe 8, the number of the air-water heat exchange unit 10 is two, the turbine generator unit includes a first generator 16 and a second generator 17, the air supply pipeline includes a first air supply pipe 18 and a second air supply pipe 19, and the number of the water-gas heat exchange unit 20 is two, a specific implementation of this embodiment is as follows:

[0084] The atmospheric air is compressed to 4.5 MPa by the first compressor 5, and the temperature of the compressed air reaches 210°C at this time. Then, after cooling through an air-water heat exchange unit 10, the temperature of the 4.5 MPa compressed air drops to 40°C, and then enters the second compressor 6 for further compression, so that the pressure of the compressed air reaches 9.0 MPa and the temperature reaches 210°C. Then, after cooling through another air-water heat exchange unit 10, the temperature of the 9.0 MPa compressed air drops to 75°C. Then, after heat dissipation through the above-mentioned heat dissipation unit, the temperature of the 9.0 MPa compressed air drops to 38°C to form high-pressure and low-temperature compressed air and enters the air storage unit 9 for storage.

[0085] At the supplementary heat unit, air from the atmosphere is pressurized by the booster fan 29 and then enters the heating tube 31. The heating tube 31 is heated by the collector 27 to form high-temperature air of about 600°C. The high-temperature air of 600°C is sent to the heating bin 22, thereby baking the heat storage block 24 in the heating bin 22, so that the temperature of the heat storage block 24 reaches about 580°C. The air in the heating bin 22 after cooling is still about 200°C. The heat is dissipated by the heat dissipation device 34 and then discharged into the atmosphere. The heat storage block 24 heated to about 580°C is transported into the insulation bin 25 for storage through the conveying module 23 or is directly sent to the supplementary heat bin 21.

[0086] The high-pressure and low-temperature compressed air stored in the air storage unit 9 is sent to the first generator 16 through the first air supply pipe 18. The pressure of the high-pressure and low-temperature compressed air coming out of the air storage unit 9 is 8.2MPa and the temperature is 45°C. In the first air supply pipe 18, the compressed air is first heated to 190°C by a water-gas heat exchange unit 20, and then passes through the heat replenishment bin 21 of the above-mentioned heat replenishment unit. The 580°C heat storage block 24 heats the first air supply pipe 18, so that the temperature of the compressed air in the first air supply pipe 18 reaches 400°C. Subsequently, the compressed air with a pressure of 8.2MPa and a temperature of 400°C enters the first generator 16 to expand and generate electricity, and then comes out of the first generator 16 and is sent to the second air supply pipe 19. The second generator 17, the temperature of the compressed air coming out of the first generator 16 drops to 50°C, and the pressure drops to 4.2MPa, and then after the action of another water-gas heat exchange unit 20, the temperature of the compressed air in the second air supply pipe 19 reaches 190°C, and then passes through the heat replenishment bin 21 of the above-mentioned heat replenishment unit, and the heat storage block 24 heats the second air supply pipe 19, so that the temperature of the compressed air in the second air supply pipe 19 reaches 400°C, and then, the compressed air with a pressure of 4.2MPa and a temperature of 400°C enters the second generator 17 to expand and generate electricity, and is finally discharged from the outlet of the second generator 17 to the atmosphere. The pressure of the gas discharged from the outlet of the second generator 17 is 0.1MPa and the temperature is 50°C.

[0087] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A compressed air energy storage power generation system based on solar energy heat supplementation, characterized in that: include: A first tank body (1) for storing cold water and a second tank body (2) for storing hot water, a cold water pipeline (3) being arranged in communication between the outlet of the first tank body (1) and the inlet of the second tank body (2), and a hot water pipeline (4) being arranged in communication between the outlet of the second tank body (2) and the inlet of the first tank body (1); The compressor unit is connected to the air storage unit (9) via a high-pressure pipeline, the high-pressure pipeline is connected to the air-water heat exchange unit (10) and the heat dissipation unit in sequence, the cold water pipeline (3) is connected to the air-water heat exchange unit (10), the air-water heat exchange unit (10) is used to transfer the heat energy of the compressed air flowing in the high-pressure pipeline to the cold water flowing in the cold water pipeline (3), and the heat dissipation unit is used to cool the compressed air flowing in the high-pressure pipeline; A turbine generator set is connected to the gas storage unit (9) via an air supply pipeline, the air supply pipeline is connected to a water-gas heat exchange unit (20) and a supplementary heat unit in sequence, the hot water pipeline (4) is connected to the water-gas heat exchange unit (20), and the water-gas heat exchange unit (20) is used to transfer the heat energy of the hot water flowing in the hot water pipeline (4) to the air flowing in the air supply pipeline; The heat replenishment unit comprises a heat replenishment bin (21), a heating bin (22) and a solar thermal module, the air supply pipeline is connected to the heat replenishment bin (21), the heating bin (22) is connected to the solar thermal module, the solar thermal module is used to collect heat energy from sunlight and transfer the heat energy to the heating bin (22), the heat replenishment unit also comprises a conveying module (23) and a plurality of heat storage blocks (24), the plurality of heat storage blocks (24) are all placed on the conveying module (23), so that the conveying module (23) is used to drive the heat storage blocks (24) to move back and forth between the heating bin (22) and the heat replenishment bin (21); When the heat storage block (24) is located in the heating chamber (22), the heat storage block (24) is heated by the heat energy transferred by the solar thermal module; When the heated heat storage block (24) is located in the heat replenishment bin (21), the heat storage block (24) releases heat to heat the air flowing in the air supply pipeline.

2. The compressed air energy storage power generation system based on light energy supplementation according to claim 1 is characterized in that: The heat storage block (24) is a porous hollow block structure.

3. The compressed air energy storage power generation system based on light energy supplementation according to claim 1 or 2, characterized in that: Also includes: A heat preservation chamber (25) for preserving the heat storage block (24) after being heated by the heating chamber (22); The conveying module (23) is a ring-type conveyor, and the heating chamber (22), the heat-insulating chamber (25) and the heat-supplementing chamber (21) are sequentially arranged on a conveying path of the ring-type conveyor.

4. The compressed air energy storage power generation system based on light energy supplementation according to claim 3 is characterized in that: The heat preservation warehouse (25) comprises: The housing (251) is provided with openings on both sides, and the ring conveyor is passed through the openings; A heat-insulating layer (252) is disposed on the outer wall of the shell (251); A temperature detector (253) is disposed in the housing (251), and the temperature detector (253) is used to detect the temperature of the heat storage block (24) located in the heat preservation chamber (25).

5. The compressed air energy storage power generation system based on light energy supplementation according to claim 1 or 2, characterized in that: The solar thermal module comprises: A concentrating reflector (26) and a heat collector (27) used in conjunction to collect solar thermal energy; An air intake pipe (28) is provided with a booster fan (29); An air outlet pipe (30), one end of which is connected to the heating chamber (22); A heating pipe (31) is arranged between the air inlet pipe (28) and the air outlet pipe (30), and the heating pipe (31) is connected to the heat collector (27) so as to utilize the heat collector (27) to heat the air flowing in the heating pipe (31).

6. The compressed air energy storage power generation system based on light energy supplementation according to claim 1 or 2, characterized in that: The turbine generator set comprises a first generator (16) and a second generator (17), the air supply pipeline comprises a first air supply pipe (18) and a second air supply pipe (19), and the water-gas heat exchange unit (20) is two in number; The first air supply pipe (18) is arranged in communication between the inlet of the first generator (16) and the outlet of the air storage unit (9), and the first air supply pipe (18) is connected to one of the water-gas heat exchange units (20); The second air supply pipe (19) is arranged between the outlet of the first generator (16) and the inlet of the second generator (17), and the second air supply pipe (19) is connected to another water-gas heat exchange unit (20); The first air supply pipe (18) and the second air supply pipe (19) are both arranged through the heat replenishment bin (21).

7. The compressed air energy storage power generation system based on light energy supplementation according to claim 6 is characterized in that: The compressor unit comprises a first compressor (5) and a second compressor (6), the high-pressure pipeline comprises a first high-pressure pipe (7) and a second high-pressure pipe (8), and the number of the air-water heat exchange units (10) is two; The first high-pressure pipe (7) is arranged in communication between the outlet of the first compressor (5) and the inlet of the second compressor (6), and the first high-pressure pipe (7) is connected to one of the air-water heat exchange units (10); The second high-pressure pipe (8) is arranged between the outlet of the second compressor (6) and the inlet of the gas storage unit (9), and the second high-pressure pipe (8) is connected in sequence to another gas-water heat exchange unit (10) and the heat dissipation unit.

8. The compressed air energy storage power generation system based on light energy supplementation according to claim 7 is characterized in that: The heat dissipation unit comprises a cooling tower (11) and a first heat exchanger (12); the cooling tower (11) is connected to the first heat exchanger (12) via a first water pipe (13); the second high-pressure pipe (8) is also connected to the first heat exchanger (12); wherein the first heat exchanger (12) is used to transfer the heat energy of the compressed air flowing through the second high-pressure pipe (8) to the cold water flowing through the first water pipe (13).

9. The compressed air energy storage power generation system based on light energy supplementation according to claim 8 is characterized in that: The cooling tower (11) is connected to the second heat exchanger (15) via a second water pipe (14), the hot water pipeline (4) is also connected to the second heat exchanger (15), and the second heat exchanger (15) is located between the water-gas heat exchange unit (20) and the first tank body (1), wherein the second heat exchanger (15) is used to transfer the heat energy of the hot water flowing in the hot water pipeline (4) to the cold water flowing in the second water pipe (14), so that the water entering the first tank body (1) is cold water.

10. A method of use, using the compressed air energy storage power generation system based on light energy supplementation as described in any one of claims 1 to 9, characterized in that: include: The air is compressed by a compressor unit to obtain high-temperature and high-pressure compressed air; The compressed air from the compressor unit is transported to the air storage unit (9) by means of a high-pressure pipeline. The compressed air is sequentially cooled by passing through an air-water heat exchange unit (10) and a heat dissipation unit while being transported in the high-pressure pipeline to form low-temperature and high-pressure compressed air. At the air-water heat exchange unit (10), the heat in the compressed air is transferred to the cold water flowing in the cold water pipeline (3), so that the temperature of the water flowing from the first tank body (1) into the second tank body (2) is increased. The compressed air from the air storage unit (9) is transported to the turbine generator set by means of an air supply pipeline. When the compressed air is transported in the air supply pipeline, it is heated by the water-gas heat exchange unit (20) and the supplementary heat unit in sequence to form high-temperature and high-pressure compressed air. At the water-gas heat exchange unit (20), the heat of the hot water flowing in the hot water pipeline (4) is transferred to the compressed air flowing in the air supply pipeline, so that the temperature of the water flowing from the second tank body (2) into the first tank body (1) is reduced. The supplementary heat unit obtains heat from sunlight through a solar thermal module to heat a heat storage block (24) placed in a heating bin (22), and relies on a transport module (23) to transport the heated heat storage block (24) to the supplementary heat bin (21) to heat the compressed air flowing in the air supply pipeline.

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