Isothermal compression air energy storage power generation system based on liquid temperature control and method thereof

Abstract

The invention belongs to the technical field of compressed air energy storage, and in particular, relates to an isothermal compression air energy storage power generation system based on liquid temperature control and a method thereof. The system consists of an internal temperature control liquid piston, hydraulic power generation equipment, a gas storage tank, a low-pressure pool, a temperature control liquid source, an external temperature adjusting facility, a liquid driving device and a valve; in energy storage, the hydraulic power generation equipment converts electric energy to liquid potential energy, gas is compressed in the internal temperature control liquid piston, generated heat is stored by liquid, and high-pressure gas is fed in the gas storage tank; in power generation, high-pressure gas is expanded for acting in the internal temperature control liquid piston, and the heat is absorbed from the liquid to push the hydraulic power generation equipment to generate electricity; and the liquid in the temperature control liquid source replaces original liquid of the internal temperature control liquid piston to control the temperature of the gas in the liquid piston, so that the liquid temperature control of the temperature control liquid source is realized, and four working modes of an open direct supply operating mode, a closed direct supply operating mode, an afterheat utilization mode and an efficient power generation mode are realized.

Description

technical field [0001] The invention belongs to the technical field of compressed air energy storage, and in particular relates to an isothermal compressed air energy storage power generation system based on liquid temperature control and a method thereof. Background technique [0002] With the rapid development of modern electric power, energy storage technology has become an important part of the grid operation process. Among various energy storage technologies, the only feasible large-capacity energy storage technologies at this stage are pumped water storage and compressed air energy storage. Among them, the pumped storage energy storage technology has strict requirements on geographical conditions and serious damage to the environment, etc., the development and application of pumped storage are limited. Compressed air energy storage has no such problems and has great development prospects. However, traditional compressed air energy storage needs to cooperate with gas ...

AI Technical Summary

Problems solved by technology

However, traditional compressed air energy storage needs to cooperate with gas turbines, which consumes fuel and generates pollution

In recent years, there have been researches on applying liquid pistons to compressed air energy storage to solve the environmental pollution problem caused by compressed air energy storage, but the air scaling is mostly adiabatic and free expansion process, and the efficiency is low

[0003] There are now liquid pistons at home and abroad, each piston chamber is composed of a single high-pressure container, and there is no other temperature control design

The disadvantage is that the gas scaling process is mostly adiabatic and free expansion process, which makes the energy release efficiency of compressed air low; and the temperature control ability is low, and the working mode is single

Images