Nonadiabatic gas expansion compressed air energy storage system

Abstract

The invention discloses a nonadiabatic gas expansion compressed air energy storage system. A motor is connected with a compressor set and an expansion machine set. The expansion machine set is formed by connecting a plurality of expansion machines in series, and a reheater is arranged in front of each expansion machine. The gas outlet of the compressor set is connected with the inlet of a high-pressure gas storage chamber through an intercooler, and the outlet of the high-pressure gas storage chamber is connected with a first fluid inlet of the first reheater. A first fluid outlet of the first reheater is connected with the gas inlet of the first expansion machine. The gas outlet of the previous expansion machine is connected with the gas outlet of the latter expansion machine through one reheater. The gas outlet of the last expansion machine is connected with the atmosphere. The outlet of a U-shaped pipe heat exchanger is connected with second fluid inlets of all the reheaters, the second fluid outlets of all the reheaters are connected with the inlet of a pressure pump, and the outlet of the pressure pump is connected with the inlet of the U-shaped pipe heat exchanger. The nonadiabatic gas expansion compressed air energy storage system is high in operating efficiency and good in operating economy and environmentally friendliness.

Description

technical field [0001] The invention relates to the technical field of physical energy storage, in particular to a compressed air energy storage system in which non-adiabatic gas expands. Background technique [0002] Compressed air energy storage technology is recognized as one of the best technologies for large-scale storage of electric energy. In 2009, it was rated as one of the top ten promising technologies in the future by the United States. In recent years, developed countries in the West (Britain, Australia, the United States, Japan, Switzerland, etc.) have made great achievements in the development of this technology. Among them, the compressed air energy storage technology proposed by the Light sail energy company in the United States has been awarded by Microsoft Corporation. huge investment ($1.7 billion). Countries around the world expect to use this technology to solve the grid-connected problems of wind power and photovoltaic power generation with the charact...

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Problems solved by technology

[0009] The purpose of the present invention is to provide a compressed air energy storage system with non-adiabatic gas expansion, which can not only reduce the cost of the energy storage system, improve the energy conversion efficiency of the energy storage device, but also solve the problem of high power conversion cost of the energy storage system and the utilization of gas compression heat. Low efficiency, fuel consumption in the process of energy release, high resistance and poor heat transfer effect in the process of hot dry rock collection, so as to further improve the economy of the system

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