Deep-refrigerating liquid air energy storage system with air stage intercooling

A liquid air and interstage cooling technology, which is applied in refrigeration and liquefaction, liquefaction, multi-stage pumps, etc., can solve the problems of high operating cost and low efficiency of circulating energy storage, and achieve the purpose of increasing the stored internal energy and reducing the energy consumption of the compressor Effect

Inactive Publication Date: 2016-11-23
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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Problems solved by technology

[0003] However, the existing cryogenic liquefied air energy storage system still has the following defects: the cryogenic liquefied air energy storage system is easily affected by many factors such as environment

Method used

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  • Deep-refrigerating liquid air energy storage system with air stage intercooling

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Embodiment 1

[0034] This embodiment provides a cryogenic liquid air energy storage system with air interstage cooling, the following combination figure 1 The energy storage system of this embodiment is described in detail, which includes:

[0035] The air compressor unit 1 includes several stages of air compressors to compress the low-temperature and low-pressure air into high-temperature and high-pressure gaseous air;

[0036] The heat energy recovery device 3 collects the heat energy generated during the air compression process;

[0037] The liquid air storage tank 4 stores the high-temperature and high-pressure liquid air;

[0038] The gasification device 5 is used to gasify the high-temperature and high-pressure liquid air into high-temperature and high-pressure gaseous air, and receive the heat energy stored in the heat energy recovery device 3;

[0039] The cold energy recovery device 6 collects the cold energy generated during the gasification of liquid air into gaseous air, and r...

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Abstract

The invention provides a deep-refrigerating liquid air energy storage system with air stage intercooling. During a conventional liquidation process, air is subjected to stage intercooling through each stage of compressor, so that the energy consumption of the compressors is greatly reduced. However, when the heat storage temperature is lower, the output power of the unit mass of an expansion unit 7 is less, and when the heat storage temperature is higher, the strength of an air compressor group 1 is limited, so that during a liquidation air energy storage system design process, both the air compressor group 1 and the expansion unit 7 need to be considered comprehensively, and thus the optimization design is made. According to the embodiment of the invention, one stage of compressor is set to be a cooling compressor only for cooling but not for compressing, so that the temperature and pressure conditions of liquid air can be reliably controlled, and the storage internal energy is helped to be improved.

Description

technical field [0001] The invention relates to the technical field of cryogenic liquefied air energy storage, in particular to a cryogenic liquid air energy storage system for air interstage cooling. Background technique [0002] Cryogenic liquefied air energy storage technology refers to the use of electric energy for compressed air during the low load period of the grid, and the high-pressure sealing of the air in abandoned mines, subsidence subsea gas storage tanks, caves, expired oil and gas wells or newly built gas storage wells. The energy storage method releases compressed air during the peak period to drive the steam turbine to generate electricity. The liquid air energy storage system has the advantages of large energy storage capacity, long energy storage period, small footprint and does not depend on geographical conditions. During energy storage, the electric energy compresses, cools and liquefies the air, and at the same time stores the heat energy released dur...

Claims

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Application Information

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IPC IPC(8): F01K7/02F04B35/04F04B41/02F04B25/00F04B39/06F25J1/02
CPCF01K7/02F04B25/00F04B35/04F04B39/06F04B41/02F25J1/0228F25J1/0235Y02E60/16
Inventor 徐桂芝赵波杨岑玉王乐宋洁金翼邓占锋胡晓汤广福宋鹏翔李志远梁立晓
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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