Heat pump energy storage system with waste heat utilization function

Abstract

This invention provides a heat pump energy storage system with waste heat utilization function. The heat pump energy storage system includes an energy storage compressor unit, an energy storage expander unit, and a regenerating heat exchanger assembly for forming an energy storage loop; an energy release compressor unit and an energy release expander unit for forming the energy storage loop with the regenerating heat exchanger assembly; a heat storage unit for storing released heat energy; a cold storage unit for storing released cold energy; a waste heat exchanger for extracting waste heat between the regenerating heat exchanger assembly and the cold storage unit; and an absorption refrigeration assembly. The absorption refrigeration assembly can utilize waste heat as a driving energy source to reduce the temperature of the medium flowing into the waste heat exchanger for waste heat extraction. The heat pump energy storage system of this invention exchanges waste heat to the absorption refrigeration assembly through the waste heat exchanger, and utilizes the waste heat as a driving energy source through the absorption refrigeration assembly to increase the temperature difference between thermal and cold energy in the system.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and more specifically to a heat pump energy storage system with waste heat utilization function. Background Technology

[0002] Heat pump energy storage is a thermodynamic cycle-based energy storage and power generation technology that achieves the conversion of "electrical energy - thermal energy - electrical energy" through two alternating cycles of energy storage and power generation. The energy storage process uses a heat pump to convert electrical energy into high-temperature thermal energy and low-temperature cold energy, which are stored separately through heat transfer media and refrigerant media, establishing a potential difference between the high and low temperatures. The power generation process then uses a heat engine to convert the thermal and cold energy back into electrical energy. However, during power generation, the heat pump energy storage system generates a significant amount of waste heat, resulting in energy loss. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a heat pump energy storage system with waste heat utilization functionality. This heat pump energy storage system exchanges waste heat to an absorption refrigeration module via a waste heat exchanger, and utilizes the waste heat as a driving energy source through the absorption refrigeration module to increase the temperature difference between thermal and cold energy in the system.

[0004] The heat pump energy storage system with waste heat utilization function according to the present invention includes:

[0005] Energy storage compressor units and energy storage expander units;

[0006] The regenerative heat exchanger assembly includes a first chamber and a second chamber that are independent of each other. The medium in the first chamber and the medium in the second chamber can exchange heat. The energy storage compressor unit, the first chamber, the energy storage expander unit, the second chamber and the energy storage compressor unit are sequentially connected to form an energy storage circulation loop.

[0007] The energy release compressor unit and the energy release expander unit are sequentially connected to form an energy release circulation loop, and the energy release circulation loop and the energy storage circulation loop operate independently.

[0008] A heat storage unit is connected to the energy storage compressor unit and the energy release expander unit respectively, for storing the heat energy released by the energy storage compressor unit or for releasing heat energy to the energy release expander unit.

[0009] A cold storage unit is connected to the energy storage expander unit and the energy release compressor unit respectively, for storing the cold energy released by the energy storage expander unit or for releasing cold energy to the energy release compressor unit.

[0010] The waste heat exchanger includes a third chamber and a fourth chamber that are independent of each other. The medium in the third chamber and the first cooling medium in the fourth chamber can exchange heat. The third chamber is connected to the cold storage unit and the first chamber.

[0011] An absorption cooling assembly is connected to the fourth chamber. The absorption cooling assembly can utilize the residual heat in the first cooling medium flowing out of the fourth chamber as a driving energy source to reduce the temperature of the first cooling medium to be flowed into the fourth chamber.

[0012] The heat pump energy storage system with waste heat utilization function in this embodiment of the invention is equipped with a waste heat exchanger to extract waste heat from the medium supplied from the first chamber to the cold storage unit during the operation of the energy release cycle, thereby increasing the cold energy of the medium when it reaches the cold storage unit. At the same time, an absorption refrigeration component is set up to utilize the waste heat extracted by the waste heat exchanger. By using the waste heat as a driving energy source, the temperature of the medium that is about to enter the waste heat exchanger and is used to extract waste heat is reduced, thereby increasing the amount of waste heat extracted and further increasing the cold energy of the medium when it reaches the cold storage unit.

[0013] In some embodiments, the absorption cooling assembly includes:

[0014] A generator, the interior of which may contain a first refrigeration medium and a second refrigeration medium, wherein the boiling point of the first refrigeration medium is lower than that of the second refrigeration medium, and the outlet of the fourth chamber is connected to the generator so as to vaporize the first refrigeration medium using the first cooling medium flowing out from the fourth chamber.

[0015] A condenser connected to the generator to receive and liquefy the vaporized first refrigerant.

[0016] An evaporator is provided, and the inlets of the condenser and the fourth chamber are respectively connected to the evaporator. The evaporator is used to receive the liquefied first refrigerant and the first cooling medium to flow into the fourth chamber. The liquefied first refrigerant absorbs the heat of the first cooling medium to flow into the fourth chamber and is evaporated.

[0017] A throttling element, connected between the condenser and the evaporator; and

[0018] An absorber is connected to both the generator and the evaporator to receive and mix the medium provided by the generator and the first refrigerant provided by the evaporator, and to return the mixed medium to the generator.

[0019] In some embodiments, the absorption cooling assembly further includes:

[0020] The first regenerative heat exchanger includes a fifth chamber and a sixth chamber that are independent of each other. The media in the fifth chamber and the media in the sixth chamber can exchange heat. The fifth chamber is connected to the outlet of the generator and the inlet of the absorber to supply the media in the generator into the absorber. The sixth chamber is connected to the inlet of the generator and the outlet of the absorber to transport the mixed media in the absorber back into the generator.

[0021] In some embodiments, the absorption cooling assembly further includes:

[0022] A pressure reducing element, which is connected to the outlet of the generator and the inlet of the absorber, for reducing the pressure of the medium supplied by the generator to the absorber;

[0023] A pressurizing element, which is connected to the outlet of the absorber and the inlet of the generator, for pressurizing the medium supplied from the absorber to the generator.

[0024] In some embodiments, the absorption cooling assembly further includes:

[0025] The cooling pipeline has the absorber and the condenser connected in series on it, so that the heat of the mixed medium in the absorber and the heat of the first refrigeration medium in the condenser can be absorbed by the second cooling medium in the cooling pipeline.

[0026] In some embodiments, the heat pump energy storage system further includes:

[0027] An energy storage drive unit, wherein at least one of the energy storage compressor unit and the energy storage expander unit is connected to the energy storage drive unit so that the energy storage drive unit drives the energy storage compressor unit and / or the energy storage expander unit;

[0028] A generator set connected to the energy release expander unit to generate electricity under the drive of the energy release expander unit.

[0029] In some embodiments, the heat storage unit includes:

[0030] A cryogenic heat medium storage tank, wherein the cryogenic heat medium storage tank contains a medium that carries heat energy;

[0031] A high-temperature heat transfer medium storage tank, wherein the high-temperature heat transfer medium storage tank contains a medium that carries heat energy, and the heat energy in the high-temperature heat transfer medium storage tank is greater than the heat energy in the low-temperature heat transfer medium storage tank; and

[0032] The first heat exchanger includes an independent seventh chamber and an eighth chamber, in which the medium in the seventh chamber and the medium in the eighth chamber can exchange heat. The seventh chamber is connected to the low-temperature heat medium storage tank and the high-temperature heat medium storage tank. The eighth chamber is connected to the outlet of the energy storage compressor unit and the first chamber, and the eighth chamber is also connected to the second chamber and the inlet of the energy release expander unit. Alternatively, there may be at least two first heat exchangers, in which the eighth chamber of one first heat exchanger is connected to the outlet of the energy storage compressor unit and the first chamber, and the eighth chamber of the other first heat exchanger is connected to the second chamber and the inlet of the energy release expander unit.

[0033] In some embodiments, the cold storage unit includes:

[0034] A cryogenic refrigerant storage tank, wherein the cryogenic refrigerant storage tank contains a medium that can carry cold energy;

[0035] A high-temperature refrigerant storage tank, wherein the high-temperature refrigerant storage tank contains a medium that carries cold energy, and the cold energy in the high-temperature refrigerant storage tank is less than the cold energy in the low-temperature refrigerant storage tank; and

[0036] The second heat exchanger includes a ninth chamber and a tenth chamber that are independent of each other. The medium in the ninth chamber and the medium in the tenth chamber can exchange heat. The ninth chamber is connected to the low-temperature refrigerant storage tank and the high-temperature refrigerant storage tank. The tenth chamber is connected to the outlet of the energy storage expander unit and the second chamber, and the tenth chamber is also connected to the third chamber and the inlet of the energy release compressor unit. Alternatively, there may be at least two second heat exchangers, in which the tenth chamber of one second heat exchanger is connected to the outlet of the energy storage expander unit and the second chamber, and the tenth chamber of the other second heat exchanger is connected to the third chamber and the inlet of the energy release compressor unit.

[0037] In some embodiments, the regenerative heat exchanger assembly includes:

[0038] The second and third regenerative heat exchangers each include a first cavity and a second cavity.

[0039] The first chamber of the second regenerative heat exchanger is connected to the eighth chamber and the inlet of the energy storage expander unit, and the second chamber of the second regenerative heat exchanger is connected to the tenth chamber and the inlet of the energy storage compressor unit.

[0040] The first chamber of the third regenerative heat exchanger is connected to the outlet of the energy release expander unit and the third chamber, and the second chamber of the third regenerative heat exchanger is connected to the outlet of the energy release compressor unit and the eighth chamber.

[0041] In some embodiments, the regenerative heat exchanger assembly includes:

[0042] The fourth regenerative heat exchanger includes a first chamber and a second chamber. The first chamber of the fourth regenerative heat exchanger is connected to the eighth chamber and the inlet of the energy storage expander unit, and the first chamber of the fourth regenerative heat exchanger is also connected to the outlet of the energy release expander unit and the third chamber. The second chamber of the fourth regenerative heat exchanger is connected to the tenth chamber and the inlet of the energy storage compressor unit, and the second chamber of the fourth regenerative heat exchanger is also connected to the outlet of the energy release compressor unit and the eighth chamber. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of a heat pump energy storage system with waste heat utilization function according to an embodiment of the present invention. Figure 1 ;

[0044] Figure 2 This is a schematic diagram of a heat pump energy storage system with waste heat utilization function according to an embodiment of the present invention. Figure 2 .

[0045] Figure label:

[0046] 1. Energy storage cycle loop; 11. Energy storage compressor unit; 12. Energy storage expander unit; 13. Energy storage drive unit; 2. Thermal storage unit; 21. Low-temperature heat medium storage tank; 22. High-temperature heat medium storage tank; 23. First heat exchanger; 231. Seventh chamber; 232. Eighth chamber; 3. Cold storage unit; 31. Low-temperature cold medium storage tank; 32. High-temperature cold medium storage tank; 33. Second heat exchanger; 331. Ninth chamber; 332. Tenth chamber; 4. Energy release cycle loop; 41. Energy release compressor unit; 42. Energy release expander unit; 43. Generator set; 5. Regenerative heat exchanger assembly; 51. First chamber; 52. Second chamber; 53. Second regenerative heat exchanger; 54. Third regenerative heat exchanger; 6. Waste heat exchanger; 61. Third chamber; 62. Fourth chamber; 7. Absorption refrigeration assembly; 71. Generator; 72. Condenser; 73. Evaporator; 74. Throttling element; 75. Absorber; 76. First regenerative heat exchanger; 761. Fifth chamber; 762. Sixth chamber; 77. Pressure reducing element; 78. Cooling piping; 79. Pressurizing element. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] The following is a reference appendix. Figure 1 and attached Figure 2 A heat pump energy storage system with waste heat utilization function is described according to an embodiment of the invention.

[0049] like Figure 1 and Figure 2 As shown, the heat pump energy storage system with waste heat utilization function in this embodiment of the invention includes an energy storage compressor unit 11, an energy storage expander unit 12, a regenerative heat exchanger assembly 5, an energy release compressor unit 41, an energy release expander unit 42, a heat storage unit 2, a cold storage unit 3, a waste heat exchanger 6, and an absorption refrigeration assembly 7.

[0050] The regenerative heat exchanger assembly 5 includes a first chamber 51 and a second chamber 52 that are independent of each other. The medium in the first chamber 51 and the medium in the second chamber 52 can exchange heat. The energy storage compressor unit 11, the first chamber 51, the energy storage expander unit 12, the second chamber 52 and the energy storage compressor unit 11 are connected in sequence to form an energy storage circulation loop 1.

[0051] Specifically, such as Figure 1 As shown, the regenerative heat exchanger assembly 5 has a first chamber 51 and a second chamber 52 capable of containing a medium and exchanging heat. The first chamber 51 and the second chamber 52 can be chambers or pipes, and both the first chamber 51 and the second chamber 52 have inlets and outlets for the medium to enter and exit. The energy storage compressor unit 11, the first chamber 51, the energy storage expander unit 12, the second chamber 52, and the energy storage compressor unit 11 are sequentially connected by pipes to form an energy storage circulation loop 1. The energy storage circulation loop 1 contains a medium, which is preferably a gas, such as air, nitrogen, carbon dioxide, helium, argon, etc., more preferably air. The air flows along the energy storage compressor unit 12. The compressor unit 11, the first chamber 51, the energy storage expander unit 12, the second chamber 52, and the energy storage compressor unit 11 circulate sequentially within the energy storage loop 1. During the flow, the energy storage compressor unit 11 is used to compress air to a high temperature and high pressure state, and the energy storage expander unit 12 is used to expand the air and convert it to a low temperature and low pressure state. The energy storage expander unit 12 and the energy storage compressor unit 11 can be drivenly connected so that the energy generated by the work done by the energy storage expander unit 12 can be used to offset the energy consumption of the energy storage compressor unit 11. The energy storage loop 1 undergoes a reverse Brayton thermodynamic cycle to generate thermal and cold energy for storage.

[0052] The energy release compressor unit 41, the second chamber 52, the energy release expander unit 42, the first chamber 51 and the energy release compressor unit 41 are connected in sequence to form the energy release circulation loop 4. The energy release circulation loop 4 and the energy storage circulation loop 1 operate independently.

[0053] Specifically, such as Figure 2As shown, the energy release compressor unit 41, the second chamber 52, the energy release expander unit 42, the first chamber 51, and the energy release compressor unit 41 are sequentially connected to form an energy release circulation loop 4. The energy release circulation loop 4 contains a medium, which is preferably a gas, such as air, nitrogen, carbon dioxide, helium, argon, etc., and more preferably air. The air circulates in the energy release circulation loop 4 in the order of the energy release compressor unit 41, the second chamber 52, the energy release expander unit 42, the first chamber 51, and the energy release compressor unit 41. During the flow, the energy release compressor unit 41 is used to compress the air to increase its temperature and pressure. The heated and pressurized air flows into the energy release expander unit 42 to expand and do work to generate energy. At the same time, the air is cooled and depressurized. The energy release compressor unit 41 and the energy release expander unit 42 can be driven to connect so that the energy generated by the work done by the energy release expander unit 42 can be used to drive the operation of the energy release compressor unit 41. A positive Brayton thermodynamic cycle is carried out in the energy release circulation loop 4 so that energy can be generated through heat and cold energy.

[0054] The heat storage unit 2 is connected to the energy storage compressor unit 11 and the energy release expander unit 42 respectively, for storing the heat energy released by the energy storage compressor unit 11 or for releasing heat energy to the energy release expander unit 42. The cold storage unit 3 is connected to the energy storage expander unit 12 and the energy release compressor unit 41 respectively, for storing the cold energy released by the energy storage expander unit 12 or for releasing cold energy to the energy release compressor unit 41.

[0055] Specifically, such as Figure 1 As shown, the heat storage unit 2 is connected to the outlet of the energy storage compressor unit 11 and the first chamber 51 via a pipeline, and the cold storage unit 3 is connected to the outlet of the energy storage expander unit 12 and the second chamber 52 via a pipeline. When the air circulates in the circulation loop 1, the high-temperature and high-pressure air discharged from the outlet of the energy storage compressor unit 11 flows to the heat storage unit 2, and then releases its heat energy to the heat storage unit 2 for storage. The low-temperature and low-pressure air discharged from the outlet of the energy storage expander unit 12 flows to the cold storage unit 3, and then releases its cold energy to the cold storage unit 3 for storage. Thus, the heat energy and cold energy generated by the reverse Brayton thermodynamic cycle are stored through the heat storage unit 2 and the cold storage unit 3.

[0056] At this time, the regenerative heat exchanger assembly 5 is used to exchange heat energy between the heat storage side (temperature higher than the target temperature) and the cold storage side (temperature lower than the target temperature). The air discharged from the heat storage unit 2 carries a significant amount of heat energy, which needs to be released before it can perform work in the energy storage expander unit 12. In other words, the temperature of the air discharged from the heat storage unit 2 is higher than the temperature that the energy storage expander unit 12 needs to accept. Simultaneously, the air discharged from the cold storage unit 3 has a lower temperature and needs to acquire heat energy to warm up before entering the energy storage compressor unit 11 for compression. In other words, the temperature of the air discharged from the cold storage unit 3 is lower than the temperature of the cold storage unit 11. The compressor unit 11 needs to receive the required temperature, so the heat exchanger assembly 5 exchanges the heat contained in the air discharged from the heat storage unit 2 to the air discharged from the cold storage unit 3. The air discharged from the heat storage unit 2 releases heat in the first chamber 51, which is the hot side, and the air discharged from the cold storage unit 3 receives heat in the second chamber 52, which is the cold side. This lowers the temperature of the heat storage side to the target temperature required by the energy storage expander unit 12, while raising the temperature of the cold storage unit 3 to the target temperature required by the energy storage compressor unit 11, without the need to introduce external energy.

[0057] like Figure 2 As shown, the heat storage unit 2 is connected to the inlet of the second chamber 52 and the energy release expander unit 42 via a pipeline, and the cold storage unit 3 is connected to the inlet of the first chamber 51 and the energy release compressor unit 41 via a pipeline. When the air circulates in the air energy release loop 4, the air is first compressed in the energy release compressor unit 41 to increase its temperature and pressure, and then flows to the heat storage unit 2 to obtain the heat energy released by the heat storage unit 2 and convert it into a high temperature and high pressure state. The air converted into a high temperature and high pressure state flows to the energy release expander unit 42 to expand and do work to generate energy. After doing work in the energy release expander unit 42, the air is cooled and depressurized and discharged to the cold storage unit 3. At the cold storage unit 3, the air obtains the cold energy released by the cold storage unit 3 and converts it into a low temperature and low pressure state, and then flows to the energy release compressor unit 41 for compression again, so that the heat storage unit 2 and the cold storage unit 3 release the stored heat energy and cold energy through a positive Brayton thermodynamic cycle.

[0058] At this time, the regenerative heat exchanger assembly 5 is used to exchange heat between the cold energy on the cold storage side (temperature higher than the target temperature) and the heat energy on the heat storage side (temperature lower than the target temperature). Air discharged from the energy release expander unit 42 has a higher temperature and needs to release heat before entering the cold storage unit 3 to receive cold energy. In other words, the air discharged from the energy release expander unit 42 has a higher temperature and needs to be further cooled before entering the cold storage unit 3. Simultaneously, air discharged from the energy release compressor unit 41 has a lower temperature and needs to acquire heat to warm up before entering the heat storage unit 2. In other words, air discharged from the energy release compressor unit 41 has a lower temperature and needs to acquire heat to warm up before entering the heat storage unit 2. Since the heat energy discharged from unit 41 is insufficient, the heat exchange function of the regenerative heat exchanger assembly 5 is used to exchange the extra heat energy that the air discharged from the energy release expander unit 42 has when it is discharged from the energy release compressor unit 41. This allows the air to reach a higher temperature after receiving the heat energy released by the heat storage unit 2 to meet the target temperature required by the energy release expander unit 42, and to reach a lower temperature after receiving the cold energy released by the cold storage unit 3, so as to approach the target temperature required by the compressor unit 41. This increases the temperature difference between the heat storage side and the cold storage side, and eliminates the need to introduce external energy.

[0059] The waste heat exchanger 6 includes a third chamber 61 and a fourth chamber 62 that are independent of each other. The medium in the third chamber 61 and the first cooling medium in the fourth chamber 62 can exchange heat. The third chamber 61 is connected to the cold storage unit 3 and the first chamber 51.

[0060] Specifically, such as Figure 2 As shown, the waste heat exchanger 6 has a third chamber 61 and a fourth chamber 62 capable of containing the medium and exchanging heat. The third chamber 61 and the fourth chamber 62 can be chambers or pipes, and both the third chamber 61 and the fourth chamber 62 have inlets and outlets for the medium to enter and exit. The third chamber 61 is connected to the outlet of the cold storage unit 3 and the first chamber 51 through a pipe. When the regenerative heat exchanger assembly 5 exchanges the additional heat from the air discharged from the energy release expander unit 42 to the air discharged from the energy release compressor unit 41, the air flowing towards the cold storage unit 3 still has waste heat. In other words, the air flowing towards the cold storage unit 3 still has a high temperature. Before entering the cold storage unit 3 to receive cold energy, it needs to release more heat so that the air can reach the target temperature required by the compressor unit 41 after receiving the cold energy released by the cold storage unit 3. Therefore, a waste heat exchanger 6 is provided. The third chamber 61 of the waste heat exchanger 6 serves as the hot side to contain air before it enters the cold storage unit 3, and the fourth chamber 62 of the waste heat exchanger 6 serves as the cold side to obtain the waste heat transferred through the heat exchange function of the waste heat exchanger 6. The waste heat is carried by the first cooling medium and discharged, so that the temperature of the air after passing through the third chamber 61 is further reduced to meet the requirements. The first cooling medium is preferably a liquid, and more preferably water.

[0061] The absorption cooling component 7 is connected to the fourth chamber 62. The absorption cooling component 7 can use the residual heat in the first cooling medium flowing out of the fourth chamber 62 as a driving energy source to reduce the temperature of the first cooling medium to be flowed into the fourth chamber 62.

[0062] Specifically, such as Figure 2 As shown, the absorption refrigeration component 7 is connected to the fourth chamber 62. The first cooling medium flowing out of the fourth chamber 62 enters the absorption refrigeration component 7. The waste heat carried by the first cooling medium is used by the absorption refrigeration component 7 as a driving energy source to reduce the temperature of the first cooling medium flowing into the fourth chamber 62. By reducing the temperature of the first cooling medium flowing into the fourth chamber 62, more waste heat is transferred out by the waste heat exchanger 6 through heat exchange. The air has a lower temperature after passing through the waste heat exchanger 6, so that the air has a lower temperature after receiving the cold energy released by the cold storage unit 3, and has more cold energy. This further increases the temperature difference between the heat storage side and the cold storage side, and no external energy source is required.

[0063] The heat pump energy storage system with waste heat utilization function in this embodiment of the invention is equipped with a waste heat exchanger to extract waste heat from the medium supplied from the first chamber to the cold storage unit during the energy release cycle operation. This increases the cooling energy of the medium upon reaching the cold storage unit, and the reliability of the heat pump energy storage system is improved due to the extraction of waste heat. Simultaneously, an absorption refrigeration component utilizes the waste heat extracted by the waste heat exchanger to lower the temperature of the medium entering the waste heat exchanger for waste heat extraction by using the waste heat as a driving energy source. This increases the extracted waste heat and further enhances the cooling energy of the medium upon reaching the cold storage unit, resulting in a lower temperature after receiving the cold energy from the cold storage unit. This increases the high and low temperature difference in the heat pump energy storage system, improves the energy round-trip efficiency of the system, and does not increase the energy consumption. Furthermore, the absorption refrigeration component ensures the temperature stability of the first cooling medium entering the fourth chamber, thereby improving the operational stability of the heat pump energy storage system.

[0064] Furthermore, since a heat pump energy storage system needs to possess both an energy storage loop and an energy release loop to simultaneously perform the functions of storing and releasing thermal energy, the energy storage loop must be a closed-loop reverse Brayton thermodynamic cycle, and the energy release loop must be a closed-loop forward Brayton thermodynamic cycle. Using a waste heat exchanger to extract waste heat ensures that the energy release loop remains closed, thus enabling the heat pump energy storage system to perform both thermal energy storage and release functions. If the energy release loop were an open loop for waste heat extraction, the heat pump energy storage system would not be able to simultaneously perform both thermal energy storage and release functions.

[0065] In some embodiments, the absorption refrigeration assembly 7 includes a generator 71, a condenser 72, an evaporator 73, a throttling element 74, and an absorber 75.

[0066] The generator 71 may contain a first cooling medium and a second cooling medium. The boiling point of the first cooling medium is higher than that of the second cooling medium. The outlet of the fourth chamber 62 is connected to the generator 71 so as to vaporize the first cooling medium using the first cooling medium flowing out of the fourth chamber 62.

[0067] Specifically, such as Figure 2 As shown, the generator 71 includes a first chamber and a second chamber. The first chamber contains a first refrigerant and a second refrigerant, and the boiling point of the first refrigerant is lower than that of the second refrigerant. The first refrigerant with a lower boiling point acts as a refrigerant, and the second refrigerant with a higher boiling point acts as an absorbent. The first and second refrigerants are miscible and do not react. In other words, the first chamber contains a binary mixed solution, which is preferably an ammonia solution or a lithium bromide solution, more preferably a lithium bromide solution. Water is the first refrigerant and lithium bromide is the second refrigerant. The second chamber is connected to the outlet of the fourth chamber 62 through a pipe so that the first cooling medium carrying residual heat enters the second chamber. The residual heat heats the first and second refrigerants in the first chamber, causing the water, which is the first refrigerant, to vaporize, while the lithium bromide, which is the second refrigerant, will not vaporize. The second chamber has an outlet for discharging the first cooling medium. The water, which is the first cooling medium, is discharged from the second chamber through this outlet after heating the lithium bromide solution. Preferably, chamber one is a cylindrical chamber, which can be the inner cavity of the storage tank, and chamber two is a cylindrical chamber surrounding or enclosing chamber one; or chamber one is the inner cavity of the storage tank, and chamber two is the inner cavity of the heating pipe, with the heating pipe located inside the storage tank.

[0068] The condenser 72 is connected to the generator 71 to receive the vaporized first refrigerant and liquefy it. The inlets of the condenser 72 and the fourth chamber 62 are respectively connected to the evaporator 73, which receives the liquefied first refrigerant and the first cooling medium to be flowed into the fourth chamber 62. The liquefied first refrigerant absorbs heat from the first cooling medium to be flowed into the fourth chamber 62 and is evaporated. A throttling element 74 is connected between the condenser 72 and the evaporator 73. The absorber 75 is connected to both the generator 71 and the evaporator 73 to receive and mix the medium provided by the generator 71 and the first refrigerant provided by the evaporator 73, and then returns the mixed medium to the generator 71.

[0069] Specifically, such as Figure 2As shown, chamber 1 of generator 71 is connected to condenser 72 via a pipe. Water vapor, the first refrigerant, is vaporized and enters condenser 72 through the pipe, where it is cooled into liquid water. Then, after being throttled and depressurized by throttling element 74 on the pipe, it enters evaporator 73. The inlet of fourth chamber 62 is connected to evaporator 73 via a pipe, and evaporator 73 is connected to the first cooling medium source via a pipe, so that the first cooling medium provided by the first cooling medium source enters fourth chamber 62 after passing through evaporator 73. Preferably, the first cooling medium source provides room temperature water. The throttled and depressurized liquid water absorbs heat from the room temperature water in evaporator 73 through heat exchange and transforms into low-pressure water vapor. The room temperature water cools down due to the absorbed heat, so that the temperature of the water entering fourth chamber 62 is even lower, preferably 3℃-7℃, thereby enabling the water to... The waste heat exchanger 6 extracts more waste heat through heat exchange. Low-pressure water vapor in the evaporator 73 enters the absorber 75 through pipes. Simultaneously, the evaporated medium inside the generator 71 also enters the absorber 75 through pipes. It should be noted that the water vaporized in the generator 71 is only a portion of the total water content of the first refrigerant, not all of it. Therefore, after the water vaporizes, the lithium bromide aqueous solution in the generator 71 becomes concentrated. This concentrated lithium bromide aqueous solution enters the absorber 75 through pipes and mixes with the low-pressure water vapor. Since the low-pressure water vapor is transformed from the vaporized water, the concentrated lithium bromide aqueous solution, after mixing with the low-pressure water vapor, returns to the original concentration of the lithium bromide aqueous solution and is then transported back to the generator 71 through the absorber 75 through pipes, where it undergoes further water vaporization under the heating of the waste heat. The throttling element 74 is preferably a throttling valve.

[0070] It is understood that the first cooling medium is not limited to being discharged into the environment after being used in the second chamber. In other embodiments, the outlet of the second chamber for discharging the first cooling medium can be connected to the source of the first cooling medium through a pipeline so that the first cooling medium can be recycled.

[0071] In some embodiments, the absorption refrigeration assembly 7 further includes a first regenerative heat exchanger 76, which includes a fifth chamber 761 and a sixth chamber 762 that are independent of each other. The medium in the fifth chamber 761 and the medium in the sixth chamber 762 can exchange heat. The fifth chamber 761 is connected to the outlet of the generator 71 and the inlet of the absorber 75 for supplying the medium in the generator 71 into the absorber 75. The sixth chamber 762 is connected to the inlet of the generator 71 and the outlet of the absorber 75 for transporting the mixed medium in the absorber 75 back into the generator 71.

[0072] like Figure 2As shown, a first pipe and a second pipe are provided between the generator 71 and the absorber 75. Both the first pipe and the second pipe connect the generator 71 and the absorber 75. The first pipe is used to supply the concentrated lithium bromide aqueous solution from the generator 71 into the absorber 75. The second pipe is used to transport the lithium bromide aqueous solution in the absorber 75 back to the generator 71. The fifth chamber 761 of the first regenerative heat exchanger 76 is connected to the first pipe and serves as the hot side. The sixth chamber 762 of the first regenerative heat exchanger 76 is connected to the second pipe and serves as the cold side. The heat from the concentrated lithium bromide aqueous solution heated by the first cooling medium is used to preheat the lithium bromide aqueous solution returning from the absorber 75 to the generator 71, making it easier for the lithium bromide aqueous solution in the generator 71 to vaporize under the heating of the first cooling medium.

[0073] It is understood that in some other embodiments, the absorption refrigeration assembly may not have a first regenerative heat exchanger.

[0074] In some embodiments, the absorption refrigeration assembly 7 further includes a pressure reducing element 77 and a pressure increasing element 79. The pressure reducing element 77 is connected to the outlet of the generator 71 and the inlet of the absorber 75 to reduce the pressure of the medium supplied by the generator 71 to the absorber 75. The pressure increasing element 79 is connected to the outlet of the absorber 75 and the inlet of the generator 71 to pressurize the medium supplied by the absorber 75 to the generator 71.

[0075] like Figure 2 As shown, the pressure-reducing element 77 is installed on the first pipe and located between the first regenerative heat exchanger 76 and the absorber 75. The concentrated lithium bromide aqueous solution in the generator 71 first releases heat in the first regenerative heat exchanger 76, and then enters the absorber 75 after being depressurized by the pressure-reducing element 77. The pressurizing element 79 is installed on the second pipe and located between the first regenerative heat exchanger 76 and the absorber 75. The lithium bromide aqueous solution discharged from the absorber 75 is first pressurized by the pressurizing element 79, and then returns to the generator 71 after absorbing heat in the first regenerative heat exchanger 76. Preferably, the pressure-reducing element 77 is a pressure-reducing valve, and the pressurizing element 79 is a solution pump.

[0076] It is understood that in some other embodiments, the absorption cooling assembly may not have pressure reducing and pressure increasing elements.

[0077] In some embodiments, the absorption cooling assembly 7 further includes a cooling pipe 78, with an absorber 75 and a condenser 72 connected in series on the cooling pipe 78 to absorb the heat of the mixed medium in the absorber 75 and the heat of the first cooling medium in the condenser 72 through a second cooling medium in the cooling pipe 78.

[0078] like Figure 2As shown, the absorber 75 requires an external cooling medium to cool its internal lithium bromide aqueous solution and / or low-pressure water vapor supplied by the evaporator 73 during operation. The condenser 72 also requires an external cooling medium to cool its internal water vapor during operation. Therefore, the absorber 75 and the condenser 72 are connected in series in a cooling pipe 78. The cooling pipe 78 contains a second cooling medium, preferably water, through which the internal heat of the absorber 75 and the internal heat of the evaporator 73 are exchanged and discharged.

[0079] It is understood that the absorber and evaporator are not limited to being cooled by cooling pipes. In other embodiments, the absorber is supplied with a cooling medium separately, and the evaporator is supplied with a cooling medium separately.

[0080] In some embodiments, the heat pump energy storage system of the present invention further includes an energy storage drive unit 13 and a generator set 43. At least one of the energy storage compressor unit 11 and the energy storage expander unit 12 is connected to the energy storage drive unit 13 so that the energy storage drive unit 13 drives the energy storage compressor unit 11 and / or the energy storage expander unit 12. The generator set 43 is connected to the energy release expander unit 42 so as to generate electricity under the drive of the energy release expander unit 42.

[0081] like Figure 1 As shown, the energy storage compressor unit 11 is connected to the energy storage drive unit 13 via a transmission. The energy storage drive unit 13 is preferably an electric motor, which drives the energy storage compressor unit 11 to operate and convert electrical energy into heat energy and cold energy for storage.

[0082] It is understood that the energy storage drive unit is not limited to being driven only by the energy storage compressor unit. In other embodiments, the energy storage drive unit is driven by both the energy storage compressor unit and the energy storage expander unit.

[0083] like Figure 2 As shown, the energy release expander 42 is connected to the generator set 43 by transmission. The energy release expander 42 drives the generator set 43 to operate, so as to convert the released heat and cold energy into electrical energy.

[0084] In some embodiments, the heat storage unit 2 includes a low-temperature heat medium storage tank 21, a high-temperature heat medium storage tank 22, and a first heat exchanger 23. The low-temperature heat medium storage tank 21 contains a medium that carries heat energy. The high-temperature heat medium storage tank 22 contains a medium that carries heat energy, and the heat energy in the high-temperature heat medium storage tank 22 is greater than the heat energy in the low-temperature heat medium storage tank 21. The first heat exchanger 23 includes a seventh chamber 231 and an eighth chamber 232 that are independent of each other. The medium in the seventh chamber 231 and the medium in the eighth chamber 232 can exchange heat. The seventh chamber 231 is connected to the low-temperature heat medium storage tank 21 and the high-temperature heat medium storage tank 22. The eighth chamber 232 is connected to the outlet of the energy storage compressor unit 11 and the first chamber 51. The eighth chamber 232 is also connected to the second chamber 52 and the inlet of the energy release expander unit 42. Alternatively, there may be at least two first heat exchangers 23. The eighth chamber 232 of one first heat exchanger 23 is connected to the outlet of the energy storage compressor unit 11 and the first chamber 51. The eighth chamber 232 of the other first heat exchanger 23 is connected to the second chamber 52 and the inlet of the energy release expander unit 42.

[0085] like Figure 1 and Figure 2 As shown, the first heat exchanger 23 has a seventh chamber 231 and an eighth chamber 232 that are independent of each other. The seventh chamber 231 and the eighth chamber 232 can be chambers or pipelines, and both the seventh chamber 231 and the eighth chamber 232 have inlets and outlets for the inlet and outlet of the medium. There are two first heat exchangers 23. The seventh chamber 231 of both first heat exchangers 23 is connected to the low-temperature heat medium storage tank 21 and the high-temperature heat medium storage tank 22. The interior of the low-temperature heat medium storage tank 21 and the high-temperature heat medium storage tank 22 contains a medium that carries heat energy. This medium can be solid materials such as bricks, concrete, quartz sand, ceramics, and metals, or liquid materials such as high-pressure water, heat transfer oil, and liquid molten salt, or even phase change materials, preferably liquid molten salt.

[0086] like Figure 1 As shown, the eighth chamber 232 of a first heat exchanger 23 is located on the energy storage circulation loop 1, and the eighth chamber 232 is connected to the outlet of the energy storage compressor unit 11 and the first chamber 51. After the air is compressed to a high temperature and high pressure state by the energy storage compressor unit 11, it flows into the eighth chamber 232 and transfers the heat energy carried by the air to the liquid molten salt in the seventh chamber 231 through heat exchange. The liquid molten salt is discharged from the low temperature heat medium storage tank 21 and receives heat energy in the seventh chamber 231 before flowing into the high temperature heat medium storage tank 22, thereby realizing the storage of heat energy.

[0087] like Figure 2As shown, the eighth chamber 232 of another first heat exchanger 23 is located on the energy release circulation loop 4, and the eighth chamber 232 is connected to the inlet of the second chamber 52 and the energy release expander 42. After the air is heated in the second chamber 52, it flows into the eighth chamber 232 and transfers the heat energy carried by the liquid molten salt to the air through heat exchange. The liquid molten salt is discharged from the high temperature heat medium storage tank 22 and releases heat energy in the seventh chamber 231 before flowing into the low temperature heat medium storage tank 21, thus realizing the release of heat energy.

[0088] It is understood that the first heat exchanger 23 is not limited to having at least two. In some embodiments, there is only one first heat exchanger 23. The inlet of the hot side of the first heat exchanger 23 is connected to the outlet of the energy storage compressor unit 11 and the low-temperature heat medium storage tank 21 through a multi-way valve. The outlet of the hot side of the first heat exchanger 23 is connected to the first chamber 51 and the high-temperature heat medium storage tank 22 through a multi-way valve. The inlet of the cold side of the first heat exchanger 23 is connected to the low-temperature heat medium storage tank 21 and the second chamber 52 through a multi-way valve. The outlet of the cold side of the first heat exchanger 23 is connected to the high-temperature heat medium storage tank 22 and the inlet of the energy release expander unit 42 through a multi-way valve. When the energy storage loop 1 is running, the hot side of the first heat exchanger 23 forms a passage with the energy storage compressor unit 11 and the first chamber 51 to form the eighth chamber 232, and the cold side of the first heat exchanger 23 forms a passage with the low-temperature heat medium storage tank 21 and the high-temperature heat medium storage tank 22 to form the seventh chamber 231. When the energy release loop 4 is running, the hot side of the first heat exchanger 23 forms a passage with the low-temperature heat medium storage tank 21 and the high-temperature heat medium storage tank 22 to serve as the seventh chamber 231, and the cold side of the first heat exchanger 23 forms a passage with the inlet of the energy release expander unit 42 and the second chamber 52 to serve as the eighth chamber 232.

[0089] In some embodiments, the cold storage unit 3 includes a low-temperature refrigerant storage tank 31, a high-temperature refrigerant storage tank 32, and a second heat exchanger 33. The low-temperature refrigerant storage tank 31 contains a medium that carries cold energy. The high-temperature refrigerant storage tank 32 contains a medium that carries cold energy, and the cold energy in the high-temperature refrigerant storage tank 32 is less than the cold energy in the low-temperature refrigerant storage tank 31. The second heat exchanger 33 includes a ninth chamber 331 and a tenth chamber 332 that are independent of each other. The medium in the ninth chamber 331 and the medium in the tenth chamber 332 can exchange heat. The ninth chamber 331 is connected to the low-temperature refrigerant storage tank 31 and the high-temperature refrigerant storage tank 32. The tenth chamber 332 is connected to the outlet of the energy storage expander unit 12 and the second chamber 52. The tenth chamber 332 is also connected to the third chamber 61 and the inlet of the energy release compressor unit 41. Alternatively, there may be at least two second heat exchangers 33. The tenth chamber 332 of one second heat exchanger 33 is connected to the outlet of the energy storage expander unit 12 and the second chamber 52. The tenth chamber 332 of the other second heat exchanger 33 is connected to the third chamber 61 and the inlet of the energy release compressor unit 41.

[0090] like Figure 1 and Figure 2As shown, the second heat exchanger 33 has two independent ninth chambers 331 and tenth chambers 332. The ninth chambers 331 and tenth chambers 332 can be chambers or pipelines, and both the ninth chambers 331 and tenth chambers 332 have inlets and outlets for medium entry and exit. There are two second heat exchangers 33, and the ninth chambers 331 of both second heat exchangers 33 are connected to the low-temperature refrigerant storage tank 31 and the high-temperature refrigerant storage tank 32. The interiors of the low-temperature refrigerant storage tank 31 and the high-temperature refrigerant storage tank 32 contain a medium that carries cold energy. This medium can be antifreeze such as ethylene glycol aqueous solution, glycerol aqueous solution, or calcium chloride aqueous solution, or it can be a phase change material such as ice slurry, more preferably calcium chloride aqueous solution.

[0091] like Figure 1 As shown, the tenth chamber 332 of a second heat exchanger 33 is located on the energy storage circulation loop 1, and the tenth chamber 332 is connected to the outlet of the energy storage expander 12 and the second chamber 52. After the air is expanded to a low temperature and low pressure state by the energy storage expander 12, it flows into the tenth chamber 332 and transfers the cold carried by the air to the calcium chloride aqueous solution in the ninth chamber 331 through heat exchange. The calcium chloride aqueous solution is discharged from the high temperature refrigerant storage tank 32 and flows into the low temperature refrigerant storage tank 31 after receiving cold energy in the ninth chamber 331, thereby realizing the storage of cold energy.

[0092] like Figure 2 As shown, the tenth chamber 332 of another second heat exchanger 33 is located on the energy release circulation loop 4, and the tenth chamber 332 is connected to the inlet of the third chamber 61 and the energy release compressor unit 41. After the air releases heat in the third chamber 61, it flows to the tenth chamber 332 and transfers the calcium chloride aqueous solution carrying cold energy to the air through heat exchange. The calcium chloride aqueous solution is discharged from the low temperature refrigerant storage tank 31 and releases cold energy in the ninth chamber 331 before flowing to the high temperature refrigerant storage tank 32, thus realizing the release of cold energy.

[0093] It is understood that the second heat exchanger 33 is not limited to having at least two; in other embodiments, there is only one second heat exchanger 33.

[0094] The hot-side inlet of the second heat exchanger 33 is connected to the high-temperature refrigerant storage tank 32 and the third chamber 61 via a multi-way valve. The hot-side outlet of the second heat exchanger 33 is connected to the low-temperature refrigerant storage tank 31 and the inlet of the energy release compressor unit 41 via a multi-way valve. The cold-side inlet of the second heat exchanger 33 is connected to the outlet of the energy storage expander unit 12 and the low-temperature refrigerant storage tank 31 via a multi-way valve. The cold-side outlet of the second heat exchanger 33 is connected to the second chamber 52 and the high-temperature refrigerant storage tank 32 via a multi-way valve. When the energy storage loop 1 is running, the hot side of the second heat exchanger 33 forms a passage with the high-temperature refrigerant storage tank 32 and the low-temperature refrigerant storage tank 31 to form the ninth chamber 331, and the cold side of the second heat exchanger 33 forms a passage with the outlet of the energy storage expander unit 12 and the second chamber 52 to form the tenth chamber 332. When the energy release cycle loop 4 is running, the hot side of the second heat exchanger 33 forms a passage with the third chamber 61 and the inlet of the energy release compressor unit 41 to serve as the tenth chamber 332, and the cold side of the second heat exchanger 33 forms a passage with the high temperature refrigerant storage tank 32 and the low temperature refrigerant storage tank 31 to serve as the ninth chamber 331.

[0095] In some embodiments, the regenerative heat exchanger assembly 5 includes a second regenerative heat exchanger 53 and a third regenerative heat exchanger 54, each including a first chamber 51 and a second chamber 52. The first chamber 51 of the second regenerative heat exchanger 53 is connected to the eighth chamber 232 and the inlet of the energy storage expander unit 12, and the second chamber 52 of the second regenerative heat exchanger 53 is connected to the tenth chamber 332 and the inlet of the energy storage compressor unit 11. The first chamber 51 of the third regenerative heat exchanger 54 is connected to the outlet of the energy release expander unit 42 and the third chamber 61, and the second chamber 52 of the third regenerative heat exchanger 54 is connected to the outlet of the energy release compressor unit 41 and the eighth chamber 232.

[0096] like Figure 1 As shown, the regenerative heat exchanger assembly 5 includes a second regenerative heat exchanger 53, which has a first chamber 51 and a second chamber 52. The first chamber 51 is connected to the eighth chamber 232 and the inlet of the energy storage expander unit 12 as the hot side, and the second chamber 52 is connected to the tenth chamber 332 and the inlet of the energy storage compressor unit 11 as the cold side.

[0097] like Figure 2 As shown, the regenerative heat exchanger assembly 5 includes a third regenerative heat exchanger 54, which also has a first chamber 51 and a second chamber 52. The first chamber 51 is connected to the outlet of the energy release expander unit 42 and the third chamber 61 as the hot side, and the second chamber 52 is connected to the outlet of the energy release compressor unit 41 and the eighth chamber 232 as the cold side.

[0098] The structure of the regenerative heat exchanger assembly 5 is not limited to having a second regenerative heat exchanger 53 and a third regenerative heat exchanger 54.

[0099] In some embodiments, the regenerative heat exchanger assembly 5 includes a fourth regenerative heat exchanger ( Figure 1 and Figure 2 (Not shown in the image) The fourth regenerative heat exchanger includes a first chamber 51 and a second chamber 52. The first chamber 51 of the fourth regenerative heat exchanger is connected to the eighth chamber 232 and the inlet of the energy storage expander unit 12. The first chamber 51 of the fourth regenerative heat exchanger is also connected to the outlet of the energy release expander unit 42 and the third chamber 61. The second chamber 52 of the fourth regenerative heat exchanger is connected to the tenth chamber 332 and the inlet of the energy storage compressor unit 11. The second chamber 52 of the fourth regenerative heat exchanger is also connected to the outlet of the energy release compressor unit 41 and the eighth chamber 232.

[0100] Specifically, the fourth regenerative heat exchanger includes a first chamber 51 and a second chamber 52. The inlet of the first chamber 51 is connected to the outlet of the eighth chamber 232 and the energy release expander unit 42 via a multi-way valve, and the outlet of the first chamber 51 is connected to the inlet of the energy storage expander unit 12 and the third chamber 61 via a multi-way valve. The inlet of the second chamber 52 is connected to the outlet of the tenth chamber 332 and the energy release compressor unit 41 via a multi-way valve, and the outlet of the second chamber 52 is connected to the inlet of the eighth chamber 232 and the energy storage compressor unit 11 via a multi-way valve.

[0101] When the energy storage cycle loop 1 is running, the first chamber 51 forms a passage with the eighth chamber 232 and the inlet of the energy storage expander unit 12, and the second chamber 52 forms a passage with the tenth chamber 332 and the inlet of the energy storage compressor unit 11. When the energy release cycle loop 4 is running, the first chamber 51 forms a passage with the outlet of the energy release expander unit 42 and the third chamber 61, and the second chamber 52 forms a passage with the outlet of the energy release compressor unit 41 and the eighth chamber 232.

[0102] In the description of this invention, it should be understood that the terms "first," "second," etc., are used only for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0103] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0104] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0105] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0106] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A heat pump energy storage system with waste heat utilization function, characterized in that, include: Energy storage compressor units and energy storage expander units; The regenerative heat exchanger assembly includes a first chamber and a second chamber that are independent of each other. The medium in the first chamber and the medium in the second chamber can exchange heat. The energy storage compressor unit, the first chamber, the energy storage expander unit, the second chamber and the energy storage compressor unit are sequentially connected to form an energy storage circulation loop. The energy release compressor unit and the energy release expander unit are sequentially connected to form an energy release circulation loop, and the energy release circulation loop and the energy storage circulation loop operate independently. A heat storage unit is connected to the energy storage compressor unit and the energy release expander unit respectively, for storing the heat energy released by the energy storage compressor unit or for releasing heat energy to the energy release expander unit. A cold storage unit is connected to the energy storage expander unit and the energy release compressor unit respectively, for storing the cold energy released by the energy storage expander unit or for releasing cold energy to the energy release compressor unit. The waste heat exchanger includes a third chamber and a fourth chamber that are independent of each other. The medium in the third chamber and the first cooling medium in the fourth chamber can exchange heat. The third chamber is connected to the cold storage unit and the first chamber. An absorption cooling assembly is connected to the fourth chamber. The absorption cooling assembly can use the waste heat in the first cooling medium flowing out of the fourth chamber as a driving energy source to reduce the temperature of the first cooling medium to flow into the fourth chamber. The absorption cooling component includes: A generator, the interior of which may contain a first refrigeration medium and a second refrigeration medium, wherein the boiling point of the first refrigeration medium is lower than that of the second refrigeration medium, and the outlet of the fourth chamber is connected to the generator so as to vaporize the first refrigeration medium using the first cooling medium flowing out from the fourth chamber. A condenser connected to the generator to receive and liquefy the vaporized first refrigerant. An evaporator is provided, and the inlets of the condenser and the fourth chamber are respectively connected to the evaporator. The evaporator is used to receive the liquefied first refrigerant and the first cooling medium to flow into the fourth chamber. The liquefied first refrigerant absorbs the heat of the first cooling medium to flow into the fourth chamber and is evaporated. A throttling element, connected between the condenser and the evaporator; and An absorber is connected to both the generator and the evaporator to receive and mix the medium provided by the generator and the first refrigerant provided by the evaporator, and to return the mixed medium to the generator.

2. The heat pump energy storage system with waste heat utilization function according to claim 1, characterized in that, The absorption refrigeration assembly also includes: The first regenerative heat exchanger includes a fifth chamber and a sixth chamber that are independent of each other. The media in the fifth chamber and the media in the sixth chamber can exchange heat. The fifth chamber is connected to the outlet of the generator and the inlet of the absorber to supply the media in the generator into the absorber. The sixth chamber is connected to the inlet of the generator and the outlet of the absorber to transport the mixed media in the absorber back into the generator.

3. The heat pump energy storage system with waste heat utilization function according to claim 1, characterized in that, The absorption refrigeration assembly also includes: A pressure reducing element, which is connected to the outlet of the generator and the inlet of the absorber, for reducing the pressure of the medium supplied by the generator to the absorber; A pressurizing element, which is connected to the outlet of the absorber and the inlet of the generator, for pressurizing the medium supplied from the absorber to the generator.

4. The heat pump energy storage system with waste heat utilization function according to claim 1, characterized in that, The absorption refrigeration assembly also includes: The cooling pipeline has the absorber and the condenser connected in series on it, so that the heat of the mixed medium in the absorber and the heat of the first refrigeration medium in the condenser can be absorbed by the second cooling medium in the cooling pipeline.

5. The heat pump energy storage system with waste heat utilization function according to claim 1, characterized in that, Also includes: An energy storage drive unit, wherein at least one of the energy storage compressor unit and the energy storage expander unit is connected to the energy storage drive unit so that the energy storage drive unit drives the energy storage compressor unit and / or the energy storage expander unit; A generator set connected to the energy release expander unit to generate electricity under the drive of the energy release expander unit.

6. The heat pump energy storage system with waste heat utilization function according to claim 1, characterized in that, The heat storage unit includes: A cryogenic heat medium storage tank, wherein the cryogenic heat medium storage tank contains a medium that carries heat energy; A high-temperature heat transfer medium storage tank, wherein the high-temperature heat transfer medium storage tank contains a medium that carries heat energy, and the heat energy in the high-temperature heat transfer medium storage tank is greater than the heat energy in the low-temperature heat transfer medium storage tank; and The first heat exchanger includes an independent seventh chamber and an eighth chamber, in which the medium in the seventh chamber and the medium in the eighth chamber can exchange heat. The seventh chamber is connected to the low-temperature heat medium storage tank and the high-temperature heat medium storage tank. The eighth chamber is connected to the outlet of the energy storage compressor unit and the first chamber, and the eighth chamber is also connected to the second chamber and the inlet of the energy release expander unit. Alternatively, there may be at least two first heat exchangers, in which the eighth chamber of one first heat exchanger is connected to the outlet of the energy storage compressor unit and the first chamber, and the eighth chamber of the other first heat exchanger is connected to the second chamber and the inlet of the energy release expander unit.

7. The heat pump energy storage system with waste heat utilization function according to claim 6, characterized in that, The cold storage unit includes: A cryogenic refrigerant storage tank, wherein the cryogenic refrigerant storage tank contains a medium that can carry cold energy; A high-temperature refrigerant storage tank, wherein the high-temperature refrigerant storage tank contains a medium that carries cold energy, and the cold energy in the high-temperature refrigerant storage tank is less than the cold energy in the low-temperature refrigerant storage tank; and The second heat exchanger includes a ninth chamber and a tenth chamber that are independent of each other. The medium in the ninth chamber and the medium in the tenth chamber can exchange heat. The ninth chamber is connected to the low-temperature refrigerant storage tank and the high-temperature refrigerant storage tank. The tenth chamber is connected to the outlet of the energy storage expander unit and the second chamber, and the tenth chamber is also connected to the third chamber and the inlet of the energy release compressor unit. Alternatively, there may be at least two second heat exchangers, in which the tenth chamber of one second heat exchanger is connected to the outlet of the energy storage expander unit and the second chamber, and the tenth chamber of the other second heat exchanger is connected to the third chamber and the inlet of the energy release compressor unit.

8. The heat pump energy storage system with waste heat utilization function according to claim 7, characterized in that, The regenerative heat exchanger assembly includes: The second and third regenerative heat exchangers each include a first cavity and a second cavity. The first chamber of the second regenerative heat exchanger is connected to the eighth chamber and the inlet of the energy storage expander unit, and the second chamber of the second regenerative heat exchanger is connected to the tenth chamber and the inlet of the energy storage compressor unit. The first chamber of the third regenerative heat exchanger is connected to the outlet of the energy release expander unit and the third chamber, and the second chamber of the third regenerative heat exchanger is connected to the outlet of the energy release compressor unit and the eighth chamber.

9. The heat pump energy storage system with waste heat utilization function according to claim 8, characterized in that, The regenerative heat exchanger assembly includes: The fourth regenerative heat exchanger includes a first chamber and a second chamber. The first chamber of the fourth regenerative heat exchanger is connected to the eighth chamber and the inlet of the energy storage expander unit, and the first chamber of the fourth regenerative heat exchanger is also connected to the outlet of the energy release expander unit and the third chamber. The second chamber of the fourth regenerative heat exchanger is connected to the tenth chamber and the inlet of the energy storage compressor unit, and the second chamber of the fourth regenerative heat exchanger is also connected to the outlet of the energy release compressor unit and the eighth chamber.

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