A method to improve the efficiency of compressed air energy storage system by using compression heat refrigeration
A technology for compressed air energy storage and system efficiency, which is applied in refrigerators, refrigeration and liquefaction, lighting and heating equipment, etc., and can solve problems such as low energy density of compressed air energy storage systems, reduced system electrical efficiency, and high power consumption of compressors , to reduce cooling consumption, improve overall performance, and reduce power consumption
Inactive Publication Date: 2017-05-24
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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However, since the AA-CAES system does not use fossil fuel heat sources, the energy density of the compressed air energy storage system is lower, which highlights the dependence on large gas storage chambers; for the CAES / TES and DCAES systems, due to the need for space heating Demand, so that the cooling temperature between the compressor stages is higher, resulting in higher power consumption of the compressor, which leads to a decrease in the electrical efficiency of the system
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[0039] The present invention provides a method for improving the efficiency of a compressed air energy storage system by utilizing compression heat refrigeration. The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.
[0040] The present invention can be realized based on the system, and its specific structure is as figure 1 As shown, the compressed air energy storage system consists of multi-stage compressors (1, 2, 3, 4), generator / motor (5), expansion units (6, 7), coolers (8, 9, 10 , 11), burner (12,13), regenerator (14), throttle valve (15), gas storage chamber (16); Described inter-stage and after-stage cooling system consists of absorption refrigerator, Cooler (21), cold storage device (33); wherein the absorption refrigerating machine includes generator (17), condenser (18), refrigerant throttling device (19), evaporator (20), absorbent throttling device (22), solution pump (23), absorb...
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The invention discloses a method for improving the efficiency of a compressed air energy storage system by utilizing compressed heat refrigeration and belongs to the field of compressed air energy storage systems. According to the method, compressed heat generated by a multi-stage compressor in the energy storage process of the compressed air energy storage system serves as a driving heat source of a refrigeration system to generate cold energy, and part of the cold energy is used for inter-stage and after-stage cooling, so that the power consumption of the multi-stage compressor is reduced, and the overall performance of the compressed air energy storage system is improved; meanwhile, the excess cold energy can be stored in a cold accumulation device, and space cooling is carried out when electricity is highly demanded, so that the consumption of electric energy is reduced.
Description
technical field [0001] The invention belongs to the field of compressed air energy storage systems, in particular to a method for improving the efficiency of compressed air energy storage systems by using compression heat refrigeration. Background technique [0002] The compressed air energy storage system is modified on the basis of the gas turbine system. The specific working process is as follows: when the power consumption is low, the compressor uses the excess electric energy to compress the air in the atmospheric environment, converts the electric energy into the internal energy of the air and stores it in the air storage room; The gas is released from the gas chamber, heated by the combustion chamber, and then enters the turbine to expand and do work, and finally converted into electrical energy. [0003] Because the compressed air energy storage system needs to compress the air in the environment to 80-200 atmospheres, in order to improve the efficiency of the multi...
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IPC IPC(8): F25B25/02
CPCF25B25/02
Inventor 何青刘辉刘文毅
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)