Novel cold force circulation and power generation system

Abstract

The invention relates to a novel cold force circulation and power generation system, which adopts an air pressure / hydraulic pressure combined high-pressure air transmission technology to realize cold force power generation (or cold force temperature difference power generation) and thermal power generation of liquid air cold energy, and has better energy storage and energy release power generation functions of photovoltaic power, wind power or peak valley power shifting and filling. The energy-saving effect is good, noise is low, liquid oxygen, liquid nitrogen or high-purity nitrogen can be produced as byproducts, and the expected social and economic benefits are obvious.

Description

Technical Field

[0001] The present invention relates to a novel cooling power cycle and power generation system, and in particular to a novel cooling power cycle and power generation system adopting air separation low-temperature expander technology and liquid-air cooling energy cooling power generation technology. Background Art

[0002] Against the backdrop of carbon neutrality, building a new power system with new energy as the main body has become a global consensus. Energy storage will participate in it as a core link and is an important guarantee for maintaining the stability of the power system.

[0003] Since photovoltaic and wind power generation are random and intermittent, and electricity has the characteristics of real-time balance of supply and demand and is difficult to store on a large scale, the large-scale grid-connected photovoltaic and wind power generation will aggravate the dual volatility and uncertainty on both the supply and demand sides of the power system, making system peak regulation difficult and bringing about a series of problems such as abandoned solar and wind power. Energy storage can smooth out the instability of photovoltaic and wind power generation and achieve a dynamic balance of electricity supply and demand.

[0004] In the summer, electricity demand is strong, and the peak-valley electricity price difference continues to expand. In 17 provinces and regions, the peak-valley electricity price difference exceeds 0.7 yuan / kWh, and the economic benefits of industrial and commercial energy storage projects are highlighted. In July 2024, with the arrival of summer, the peak-valley electricity price difference in various regions across the country has widened. A total of 17 regions have a peak-valley electricity price difference of more than 0.7 yuan / kWh. The top three are Guangdong Province (five cities in the Pearl River Delta), Hainan Province, and Jiangsu Province. The largest peak-valley price differences reached 1.27 yuan / kWh, 1.22 yuan / kWh, and 1.14 yuan / kWh, respectively, and the economic benefits of peak-valley arbitrage have been significantly improved. Even in the spring when electricity demand is relatively stable, there are still 16 regions with a peak-valley electricity price difference of more than 0.7 yuan / kWh in March, which effectively guarantees the profitability stability of peak-valley arbitrage of industrial and commercial energy storage systems in the year-round dimension.

[0005] The new energy power supply system will face problems such as mismatch between power supply and demand, and energy storage, virtual power plants, microgrids and other regulatory means are indispensable. Electricity is a dynamic process energy that is not easy to store. It is mainly achieved through the power grid to achieve simultaneous production, transmission and consumption. The power generation method of new energy (such as wind power and solar energy) is greatly affected by weather conditions and has the characteristics of intermittent, volatility and instability. Large-scale application will have an impact on the stability of the power grid. In order to cope with the power generation characteristics of new energy power generation, energy storage, virtual power plants, microgrids and other regulatory means will be widely used in the future. Therefore, the configuration of energy storage is indispensable in the future green power energy system, and the role of new energy storage in promoting the development and consumption of new energy and the safe and stable operation of the power system is gradually emerging.

[0006] Liquid air energy storage (LAES) is a new type of energy storage technology that stores energy by liquefying air. This technology uses the "compression-expansion" process of air to cool the compressed air to a liquid state for storage, completing the conversion of electrical energy and pressure energy. Compared with traditional compressed air energy storage systems (CAES), liquefied air energy storage technology realizes the storage of electrical energy in the form of liquid air. In addition to the many application advantages of compressed air energy storage technology, this technology does not require large pressure storage containers, thus getting rid of the restrictions on its site selection and construction due to factors such as geographical location. The energy storage density of this method is 10 to 40 times that of compressed air energy storage. It can store more energy in smaller containers, is not restricted by geographical conditions, and has more flexible site selection.

[0007] There are some demonstration projects of liquid compressed air energy storage (LAES) technology at home and abroad. For example, China Green Development is building the first domestic liquefied air energy storage demonstration project based on the 60,000 kW / 600,000 kW-hour liquefied air energy storage project in Haixi, Qinghai. At present, the project has completed the site selection and technical scheme demonstration, and has passed the feasibility study review organized by the State Grid Engineering Institute entrusted by the Qinghai Provincial Energy Bureau. It is handling the preliminary procedures such as environmental impact assessment, safety assessment, and access system approval. The project is scheduled to be put into operation in 2024, when it will become the world's most powerful liquefied air energy storage power station. In April 2022, China Green Development Investment Group Co., Ltd. and the Institute of Physical and Chemical Technology of the Chinese Academy of Sciences signed an investment agreement. The two parties established a liquefied air energy storage joint venture and an advanced energy storage joint research center, committed to realizing the industrialization of liquefied air energy storage technology. In December 2022, the liquid air energy storage technology research project applied by Hebei Jiantou Guorong Energy Service Co., Ltd. was successfully "unveiled" and was listed as a provincial science and technology plan project in Hebei Province. In addition, Jiangsu Jinhe Energy Technology Co., Ltd., a company in the heat storage industry, is also trying to enter this market.

[0008] Chinese patents such as CN201210266535.4-High-efficiency and high-pressure liquid air energy storage and release system, CN201310061963.8-Compressed air energy storage system, etc., have conducted in-depth research on liquid compressed air energy storage (LAES) technology.

[0009] The key equipment of LAES technology, such as compressors, high-pressure gas storage tanks, cryogenic expanders, liquid pumps, expansion generators and other domestic equipment, has been relatively mature, and the industrial chain is mature. As the capacity of the energy storage system increases, the cost will tend to decrease, and it is expected that LAES technology will usher in a broader application prospect in the future.

[0010] Therefore, the cold power cycle air liquefaction technology in LAES, energy-saving compressor high-pressure gas transmission technology, cold power generation of cold energy during liquid air output and other technologies are worthy of in-depth study. Summary of the invention

[0011] A novel cold power cycle and power generation system, the system adopts a supplementary cold cycle loop, the supplementary cold cycle loop refers to the liquid air (liquid air is liquid air, the same below) coming out of the liquid storage tank 3, after being gasified by the hydraulic pump 4 and the cold exchange unit 2, then discharged by the low-temperature expander 5 and the cold exchange unit 2, entering the compressor 1 or the compressor 7 for pressurization, and then liquefied by the cold exchange unit 2, and entering the liquid storage tank 3, the mechanical work generated by the low-temperature expander 5 drags the brake 6 to supplement the liquefaction process of the compressed air; or the air is pre-cooled and liquefied by the compressor 1 and the cold exchange unit 2, and a part of the air or liquid air diverted is discharged into the atmosphere through the cold exchange unit 2, the low-temperature expander 5, and the cold exchange unit 2, or enters the compressor 1 and / or the compressor 7 for pressurization, and then returns to the part of the gas phase air or liquid air diversion point diverted by the cold exchange unit 2, thereby forming a supplementary cold cycle loop of the cold power cycle system;

[0012] When storing energy:

[0013] After being compressed by the compressor 1, the air enters the cooling unit 2 to be liquefied into liquid air, which is then sent to the liquid storage tank 3. The liquid air in the liquid storage tank 3 is then pressurized by the high-pressure pump 14 and enters the high-pressure liquid storage tank 22 for energy storage.

[0014] When releasing energy:

[0015] The high-pressure liquid air in the high-pressure liquid storage tank 22 enters the condenser 25, and the condenser 25 absorbs the cold released by the high-pressure liquid air, liquefies the gaseous organic working fluid discharged from the organic working fluid gas turbine 28, and then gasifies it through the organic working fluid circulation pump 26 and the evaporator 27. The formed superheated gaseous organic working fluid enters the organic working fluid gas turbine 28 to expand and do work, and drives the cold power generator 29 to generate electricity. The gaseous organic working fluid discharged from the organic working fluid gas turbine 28 enters the condenser 25 again, thereby forming an organic working fluid Rankine cycle loop; the high-pressure air 32 coming out of the condenser 25 is heated by the reheater 17, and then enters the gas turbine 18 to expand and do work, and drives the gas turbine generator 19 to generate electricity, and the gas turbine exhaust 21 is discharged; or the high-pressure air 32 coming out of the condenser 25 is heated by the reheater 20 and the reheater 17, and then enters the gas turbine 18 to expand and do work, and drives the gas turbine generator 19 to generate electricity. The outlet gas of the gas turbine 18 recovers heat through the reheater 20 to form the gas turbine exhaust 21;

[0016] Alternatively, the high-pressure liquid air in the high-pressure liquid storage tank 22 enters the temperature difference power generation unit 30 , absorbs the cold energy released by the high-pressure liquid air to perform temperature difference power generation, and outputs temperature difference electricity 31 .

[0017] The temperature difference power generation unit 73 is selected with reference to the existing known technology. For example, CN201310030046.3 provides a cold energy temperature difference power generation device, CN201910807235.4 provides an LNG cold energy temperature difference power generation system based on a seawater vaporizer, CN202410506362.1 provides a power battery cold and heat integrated management system and working method based on phase change cooling and temperature difference power generation, and so on.

[0018] The cooling unit 2 adopts a shell and tube, plate fin, microchannel or other type of cooling exchanger. Its structure and cooling elements are similar to the shell and tube heat exchanger, plate fin heat exchanger, microchannel or other type of heat exchanger in the traditional air separation process. Multiple cooling exchangers are combined together in series, parallel or series-parallel connection.

[0019] The boiling point of the organic working fluid in the organic Rankine cycle under standard atmospheric pressure is less than -10°C. Preferably, propane is used as the working fluid in the organic Rankine cycle.

[0020] The heat source of the reheater 17 is one or more of the following thermal energies: compression heat generated by a compressor or an air compressor; industrial waste heat or waste heat; solar thermal energy; heat energy released by fuel combustion; geothermal energy; heat energy stored in a heat storage medium; the heat source of the reheater 17 is used to heat the high-pressure air 32.

[0021] The air compression and cooling process in the novel cold power cycle and power generation system also includes air purification and purification, which is used to remove solid matter and impurity gases in the air; the air purification and purification equipment is integrated in the compressor 1 and / or the compressor 7 and / or the cold exchange unit 2, or integrated in the connecting pipes of the compressor 1, the compressor 7, and the cold exchange unit 2.

[0022] The brake 6 of the cryogenic expander 5 includes but is not limited to a fan, a liquid pump, a compressor or an air compressor, and is used to recover the expansion work generated by the cryogenic expander 5 .

[0023] The air compressor 1 or compressor 7 is only used for distinction, and in essence they are both air compression and boosting equipment; the same applies to hydraulic pumps or liquid air pumps, and high-pressure pumps.

[0024] The compressed air in the novel cooling power cycle and power generation system is an isobaric liquefaction process, which means that the raw air entering the cooling unit 2 does not need to be expanded, depressurized and refrigerated like the traditional air separation process. The air coming out of the compressor only has resistance losses of equipment and pipelines along the way, and can be regarded as an isobaric liquefaction process of air with little pressure change.

[0025] The air purification and purification equipment in the novel cold power cycle and power generation system, wherein the purification equipment includes a molecular sieve purifier, a reversible cooler or a stone cooler, etc., should be able to ensure the continuous and normal operation of the process.

[0026] A distillation unit 9 is provided: the liquid air coming out of the liquid storage tank 3 is pressurized by the liquid air pump 8 and then enters the distillation unit 9 to produce liquid oxygen 10 and gaseous nitrogen for output.

[0027] A liquefaction unit 11 is provided: the gaseous nitrogen produced from the distillation unit 9 passes through the liquefaction unit 11 to produce liquid nitrogen 12.

[0028] The distillation unit 9 is designed, installed and operated with reference to the distillation tower of the air separation device.

[0029] The liquefaction unit 11 is implemented by a conventional compression refrigeration process or a low-temperature expansion machine process.

[0030] A vaporizer 23 is provided: one end of the vaporizer 23 is connected to the bottom liquid side of the high-pressure liquid storage tank 22 through a pipeline, and the other end is connected to the top gas side of the high-pressure liquid storage tank 22 through a pipeline; when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank 22 releases energy, the pressure in the high-pressure liquid storage tank 22 decreases, and the high-pressure and low-temperature liquid air in the vaporizer 23 is heated to be vaporized and enter the top gas space of the high-pressure liquid storage tank 22, thereby maintaining the pressure in the high-pressure liquid storage tank 22 stable.

[0031] A pressure regulating pump 24 is provided: when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank 22 releases energy, the pressure in the high-pressure liquid storage tank 22 decreases, and the output pressure is adjusted by the pressure regulating pump 24 to maintain the pressure of the high-pressure gas phase air 76 stable. The pressure regulating pump 24 adopts a variable frequency speed regulation operation mode to maintain the stability of the output pressure.

[0032] When the high-pressure and low-temperature liquid air in the high-pressure liquid storage tank 22 absorbs heat and its pressure increases, a gas release expansion cooling circuit is provided: the gaseous air discharged from the high-pressure liquid storage tank 22 is expanded and works by the release gas expander 33 to reduce the pressure and temperature, and enters the cooling unit 2 to recover the cold and then be discharged.

[0033] In the present application, the compression heat of the outlet gas of the compressor 7 or the air compressor 1 is recovered and utilized through a heat accumulator.

[0034] Equipment and its systems, pipelines, instruments, valves, cold preservation, bypass facilities with regulating functions, etc. not described in this application shall be matched with reference to or in accordance with mature technologies in well-known traditional processes.

[0035] The equipment and pipelines in this application adopt necessary heat recovery and cooling measures.

[0036] Parts not mentioned in this application, such as safety accessories, automatic control, etc., are equipped with existing publicly known technologies, that is, existing mature, reliable and reasonable technical measures are applied to this device.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] 1. Compared with the existing multi-stage compression and intermediate cooling compressor high-pressure gas transmission technology, the high-pressure gas supply technology of air isobaric liquefaction and hydraulic pump pressurization and cooling combined with full low-pressure oxygen production technology can effectively reduce the compression heat power consumption of the compressor and reduce the difficulty of heat recovery of the low-grade compression heat of the compressor. The comprehensive power consumption of high-pressure gas supply is greatly reduced and the noise is low. It is essentially a new energy-saving gas pressure / hydraulic combined high-pressure gas supply unit. The gas pressure / hydraulic combined high-pressure gas supply unit is suitable for the transformation and upgrading of the existing liquid air energy storage power station gas supply system;

[0039] 2. Compared with the existing liquid air energy storage power station, the new cooling power cycle and power generation system combined with the pneumatic / hydraulic combined high-pressure air supply unit not only has obvious energy-saving effects, but also has the characteristics of co-producing liquid oxygen, nitrogen, and liquid nitrogen, and can flexibly adjust the operation mode according to market conditions to improve the comprehensive benefits of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the process flow of a new type of cooling power cycle and power generation system.

[0041] Figure 1 In: 1-compressor, 2-cooling unit, 3-low-pressure liquid storage tank, 4-hydraulic pump, 5-cryogenic expander, 6-brake, 7-compressor, 8-liquid air pump, 9-distillation unit, 10-liquid oxygen, 11-nitrogen liquefaction unit, 12-liquid nitrogen, 13-liquid air, 14-high-pressure pump, 17-regenerator, 18-gas turbine, 19-gas turbine generator, 20-regenerator, 21-gas turbine exhaust, 22-high-pressure liquid storage tank, 23-vaporizer, 24-pressure regulating pump, 25-condenser, 26-organic working fluid pump, 27-evaporator, 28-organic working fluid gas turbine, 29-organic working fluid generator, 30-thermoelectric power generation unit, 31-thermoelectric, 32-high-pressure air, 33-release gas expander, 34-circulating pump. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Embodiment 1:

[0044] like Figure 1 As shown, a new type of cooling power cycle and power generation system, the implementation process of the system is as follows:

[0045] The system adopts a supplementary cooling circulation loop, which refers to the liquid air coming out of the liquid storage tank 3, which is gasified by the hydraulic pump 4 and the cooling unit 2, and then discharged by the low-temperature expander 5 and the cooling unit 2, and then enters the compressor 1 or the compressor 7 for pressurization, and then liquefied by the cooling unit 2 and enters the liquid storage tank 3. The mechanical work generated by the low-temperature expander 5 drags the brake 6 to supplement the cooling of the liquefaction process of the compressed air;

[0046] When storing energy:

[0047] After being compressed by the compressor 1, the air enters the cooling unit 2 to be liquefied into liquid air, which is then sent to the liquid storage tank 3. The liquid air in the liquid storage tank 3 is then pressurized by the high-pressure pump 14 and enters the high-pressure liquid storage tank 22 for energy storage.

[0048] When releasing energy:

[0049] The high-pressure liquid air in the high-pressure liquid storage tank 22 enters the condenser 25, and the condenser 25 absorbs the cold released by the high-pressure liquid air, liquefies the gaseous organic working fluid discharged from the organic working fluid gas turbine 28, and then gasifies it through the organic working fluid circulation pump 26 and the evaporator 27. The superheated gaseous organic working fluid forms enters the organic working fluid gas turbine 28 to expand and do work, driving the cold power generator 29 to generate electricity. The gaseous organic working fluid discharged from the organic working fluid gas turbine 28 enters the condenser 25 again, thereby forming an organic working fluid Rankine cycle loop; the high-pressure air 32 coming out of the condenser 25 is heated by the regenerator 20 and the supplementary heat device 17, and then enters the gas turbine 18 to expand and do work, driving the gas turbine generator 19 to generate electricity. The outlet gas of the gas turbine 18 recovers heat through the regenerator 20 to form the gas turbine exhaust 21.

[0050] The cooling unit 2 adopts shell and tube, plate fin, microchannel or other types of coolers, and its structure and cooling elements are similar to the shell and tube heat exchanger, plate fin heat exchanger, microchannel or other types of heat exchangers in the traditional air separation process. Multiple coolers are combined together in series, parallel or series-parallel connection.

[0051] The organic working fluid in the organic Rankine cycle is propane.

[0052] The heat source of the reheater 17 is one or more of the following thermal energies: compression heat generated by a compressor or an air compressor; industrial waste heat or waste heat; solar thermal energy; heat energy released by fuel combustion; geothermal energy; heat energy stored in a heat storage medium; the heat source of the reheater 17 is used to heat the high-pressure air 32.

[0053] The air compression and cooling process in the novel cold power cycle and power generation system also includes air purification and purification, which is used to remove solid matter and impurity gases in the air; the air purification and purification equipment is integrated in the compressor 1 and / or the compressor 7 and / or the cold exchange unit 2, or integrated in the connecting pipes of the compressor 1, the compressor 7, and the cold exchange unit 2.

[0054] The brake 6 of the cryogenic expander 5 includes but is not limited to a fan, a liquid pump, a compressor or an air compressor, and is used to recover the expansion work generated by the cryogenic expander 5 .

[0055] The air purification and purification equipment in the novel cold power cycle and power generation system, wherein the purification equipment includes a molecular sieve purifier, a reversible cooler or a stone cooler, etc., should be able to ensure the continuous and normal operation of the process.

[0056] A distillation unit 9 is provided: the liquid air coming out of the liquid storage tank 3 is pressurized by the liquid air pump 8 and then enters the distillation unit 9 to produce liquid oxygen 10 and gaseous nitrogen for output.

[0057] A liquefaction unit 11 is provided: the gaseous nitrogen produced from the distillation unit 9 passes through the liquefaction unit 11 to produce liquid nitrogen 12.

[0058] The distillation unit 9 is designed, installed and operated with reference to the distillation tower of the air separation device.

[0059] The liquefaction unit 11 is implemented by a conventional compression refrigeration process or a low-temperature expansion machine process.

[0060] A vaporizer 23 is provided: one end of the vaporizer 23 is connected to the bottom liquid side of the high-pressure liquid storage tank 22 through a pipeline, and the other end is connected to the top gas side of the high-pressure liquid storage tank 22 through a pipeline; when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank 22 releases energy, the pressure in the high-pressure liquid storage tank 22 decreases, and the high-pressure and low-temperature liquid air in the vaporizer 23 is heated to be vaporized and enter the top gas space of the high-pressure liquid storage tank 22, thereby maintaining the pressure in the high-pressure liquid storage tank 22 stable.

[0061] When the high-pressure and low-temperature liquid air in the high-pressure liquid storage tank 22 absorbs heat and its pressure increases, a gas release expansion cooling circuit is provided: the gaseous air discharged from the high-pressure liquid storage tank 22 is expanded and works by the release gas expander 33 to reduce the pressure and temperature, and enters the cooling unit 2 to recover the cold and then be discharged.

[0062] In the present application, the compression heat of the outlet gas of the compressor 7 or the air compressor 1 is recovered and utilized through a heat accumulator.

[0063] Parts not mentioned in the present invention, such as safety accessories, instruments, meters, automatic control, etc., are equipped with existing well-known technologies, and existing mature, reliable and reasonable technical measures can be applied to this device.

[0064] Although the present invention has been disclosed as above with preferred embodiments, they are not intended to limit the present invention. Anyone familiar with the art can make various changes or modifications without departing from the spirit and scope of the present invention, which also belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the definition of the claims of this application.

Claims

1. A novel cooling cycle and power generation system, characterized in that: The supplementary cooling circuit refers to the liquid air coming out of the liquid storage tank (3), which is gasified by the hydraulic pump (4) and the cooling unit (2), and then enters the low-temperature expansion machine (5) to expand and do work to reduce the temperature. The exhaust gas of the low-temperature expansion machine (5) enters the cooling unit (2) to recover the cold and then is discharged. It is then pressurized by the compressor (1) or the compressor (7) and enters the cooling unit (2) to be liquefied and enters the liquid storage tank (3) for storage. The low-temperature expansion machine (5) drags the brake (6); or a part of the gaseous air or liquid air diverted from the cooling unit (2) passes through the cooling unit (2), the low-temperature expansion machine (5), and the cooling unit (2) and enters the compressor (1) and / or the compressor (7) to be pressurized, and then returns to the diversion point of a part of the gaseous air or liquid air diverted from the cooling unit (2), thereby forming a supplementary cooling circuit; When storing energy: After being compressed by the compressor (1), the air enters the cooling unit (2) to be liquefied to obtain liquid air, which is then sent to the liquid storage tank (3). The liquid air in the liquid storage tank (3) is then pressurized by the high-pressure pump (14) and enters the high-pressure liquid storage tank (22) to store energy. When releasing energy: The high-pressure liquid air in the high-pressure liquid storage tank (22) enters the condenser (25), and the condenser (25) absorbs the cold energy released by the high-pressure liquid air, liquefies the gaseous organic working fluid discharged from the organic working fluid gas turbine (28), and then gasifies it through the organic working fluid circulation pump (26) and the evaporator (27). The formed superheated gaseous organic working fluid enters the organic working fluid gas turbine (28) to expand and perform work, driving the cold power generator (29) to generate electricity. The gaseous organic working fluid discharged from the organic working fluid gas turbine (28) enters the condenser (25) again, thereby forming an organic working fluid Rankine cycle. Loop circuit; the high-pressure air (32) from the condenser (25) is heated by the reheater (17) and then enters the gas turbine (18) to expand and perform work, driving the gas turbine generator (19) to generate electricity, and the gas turbine exhaust (21) is discharged; or the high-pressure air (32) from the condenser (25) is heated by the reheater (20) and the reheater (17) and then enters the gas turbine (18) to expand and perform work, driving the gas turbine generator (19) to generate electricity, and the outlet gas of the gas turbine (18) recovers heat through the reheater (20) to form the gas turbine exhaust (21); Alternatively, the high-pressure liquid air in the high-pressure liquid storage tank (22) enters the temperature difference power generation unit (30) to output temperature difference electricity (31), and the high-pressure air (32) coming out of the temperature difference power generation unit (30) is heated by the reheater (17) and then enters the gas turbine (18) to expand and perform work, thereby driving the gas turbine generator (19) to generate electricity, and the gas turbine exhaust (21) is discharged; or the high-pressure air (32) coming out of the temperature difference power generation unit (30) is heated by the reheater (20) and the reheater (17) and then enters the gas turbine (18) to expand and perform work, thereby driving the gas turbine generator (19) to generate electricity, and the outlet gas of the gas turbine (18) recovers heat through the reheater (20) to form the gas turbine exhaust (21).

2. The novel cooling cycle and power generation system according to claim 1 is characterized in that: The air purification and purifying equipment in the air compression and cooling process in the novel cold power cycle and power generation system is integrated in the compressor (1) and / or the compressor (7) and / or the cold exchange unit (2), or integrated in the connecting pipes of the compressor (1), the compressor (7) and the cold exchange unit (2).

3. The novel cooling cycle and power generation system according to claim 1 is characterized in that: A vaporizer (23) is provided: one end of the vaporizer (23) is connected to the bottom liquid side of the high-pressure liquid storage tank (22) through a pipeline, and the other end is connected to the top gas side of the high-pressure liquid storage tank (22) through a pipeline; when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank (22) releases energy, the pressure in the high-pressure liquid storage tank (22) decreases, and the high-pressure and low-temperature liquid air in the vaporizer (23) is heated to vaporize and enter the top gas space of the high-pressure liquid storage tank (22), thereby maintaining the pressure in the high-pressure and low-temperature liquid storage tank (22) stable.

4. The novel cooling cycle and power generation system according to claim 1 is characterized in that: A pressure regulating pump (24) is provided: when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank (22) releases energy, the pressure in the high-pressure liquid storage tank (22) decreases, and the output pressure is adjusted by the pressure regulating pump (24) to maintain the pressure of the high-pressure gas phase air stable. The pressure regulating pump (24) adopts a variable frequency speed regulation operation mode to maintain the stability of the output pressure.

5. The novel cooling cycle and power generation system according to claim 1 is characterized in that: When the high-pressure and low-temperature liquid air in the high-pressure liquid storage tank (22) absorbs heat and its pressure increases, the gaseous air discharged from the high-pressure liquid storage tank (22) is expanded by the release gas expansion machine (33) to perform work, driving the circulation pump (34) to pressurize the liquid air, and then enters the cooling unit (2) to release the cold energy before being discharged.

6. The novel cooling cycle and power generation system according to claim 1 is characterized in that: A distillation unit (9) is provided: liquid air from the liquid storage tank (3) is pressurized by a liquid air pump (8) and then enters the distillation unit (9) to produce liquid oxygen (10) and gaseous nitrogen for output.

7. The novel cooling cycle and power generation system according to claim 6 is characterized in that: A liquefaction unit (11) is provided: the gaseous nitrogen produced by the distillation unit (9) is passed through the liquefaction unit (11) to produce liquid nitrogen (12).

8. The novel cooling cycle and power generation system according to claim 1 is characterized in that: The brake (6) comprises a fan, a liquid pump, a compressor or an air compressor.

9. The novel cooling cycle and power generation system according to claim 1 is characterized in that: The heat source of the reheater (17) is one or more of the following thermal energies: compression heat generated by a compressor or an air compressor; industrial waste heat or waste heat; solar thermal energy; thermal energy released by fuel combustion; geothermal energy; and thermal energy stored in a heat storage medium.

10. The novel cooling cycle and power generation system according to claim 1 is characterized in that: The cooling unit (2) adopts a shell and tube type, plate fin type, or microchannel type cooler.

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