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

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...

AI Technical Summary

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 research on grid connection and other related aspects; at the same time, the current compressed air Energy storage system research has not yet broken through key technologies such as energy storage efficiency, which severely limits the further development of compressed air energy storage systems

Images