Method for improving energy storage efficiency of compressed air energy storage system

A compressed air energy storage and system energy storage technology, which is applied in steam engine devices, machines/engines, mechanical equipment, etc., can solve the problems of lack of grid-connected research, lack of theoretical analysis results, and restrictions on the development of compressed air energy storage systems

Inactive Publication Date: 2016-07-27
WUHU POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER +1
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Problems solved by technology

[0004] However, at present, there is a shortage and deficiency in the basic theory and experimental system research of compressed air energy storage, lack of a complete set of experimental equipment and complete experimental data corresponding to theoretical analysis results, and even less res

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  • Method for improving energy storage efficiency of compressed air energy storage system

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Embodiment Construction

[0015] In order to optimize the energy storage efficiency of the system and explore a higher cycle flow, the present invention proposes a new compressed air energy storage flow. The process uses molten salt as the heat storage medium, which greatly improves the circulation parameters of the system.

[0016] Specific as figure 1 As shown, the present invention includes adding a low-temperature molten salt tank 1 to the existing energy storage system, and the low-temperature molten salt in the low-temperature molten salt tank 1 is heated by a molten salt electric heater 3 and then transported to a high-temperature molten salt tank 2; The high-temperature molten salt in the salt tank 2 returns to the low-temperature molten salt tank 1 after passing through the first-stage turbine heater 4 , the second-stage turbine heater 5 , and the third-stage turbine heater 6 . The low-peak power, abandoned wind power, and abandoned photovoltaics stored in the energy storage system supply pow...

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Abstract

The invention discloses a method for improving energy storage efficiency of a compressed air energy storage system. The method is characterized by comprising the following steps: additionally arranging a low-temperature fused salt tank in an exiting energy storage system; heating low-temperature fused salt inside the low-temperature fused salt tank by using an electric fused salt heater and then conveying the fused salt to a high-temperature fused salt tank; retuning the high-temperature fused salt inside the high-temperature fused salt tank to the low-temperature fused salt tank after the high-temperature fused salt passes through a first-stage turbine heater, a second turbine heater and a third turbine heater respectively. By adopting the method, off-peak electricity, abandoned wind electricity and abandoned photo-electricity in the energy storage system are fully utilized, and the fused salt is used as a heat storage medium, so the energy storage efficiency of the system is greatly improved, the original structure is subjected to small changes, and the existing compressed air energy storage system can be modified.

Description

[0001] technical field [0002] The invention relates to the technical field of compressed air energy storage, in particular to a method for improving energy storage efficiency of a compressed air energy storage system. Background technique [0003] Compressed air energy storage (CAES) uses high-pressure air to store electricity. During the energy storage process, the electricity drives the compressor (or directly driven by mechanical energy) to compress the air and store it in the air storage chamber; during the energy release process, the high-pressure air is released to expand and do work, driving the generator to output electricity. In recent years, the international power energy storage industry has developed rapidly, and the current average annual growth rate is about 9.0%, which is much higher than the 2.5% growth rate of global power. The energy storage industry has become an emerging industry that major developed countries in the world focus on. With the continuous g...

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Application Information

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IPC IPC(8): F01K3/14F01K7/22F01K13/02
CPCF01K3/14F01K7/22F01K13/02
Inventor 林其友刘亚南任水华陈来军赵武薛小代李涛
Owner WUHU POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER
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