Compressed gas distributed energy source system using rare gases as working medium

Abstract

The invention discloses a compressed gas distributed energy source system using rare gases as a working medium. The system regards the demands for heat and cold of a user as a main target, the heat and the cold are supplied through the process heat produced by compressed gas and low temperature cooling capacity caused by gas expansion, and meanwhile a certain electric quantity is output in an auxiliary mode. The system regards the rare gases as the working medium, the difficulty of designing the system is effectively reduced, the cost of an energy storage system is reduced and safety and stability of system operation are guaranteed by utilizing the state changes of a gas state-a super-critical state-the gas state of the rare gases. Meanwhile, the change of the system series is changed by utilizing the switching of a valve, the electricity output quantity of the cold and the heat of the system is controlled, and the cold and heat supply and the demands can be balanced. The system can be used in cooperation with wind energy, solar energy and other renewable energy sources, other pollutants are not produced in the process of operating, and the compressed gas distributed energy source system has good energy-saving and environment-friendly benefits.

Description

technical field [0001] This system involves the field of energy storage technology and distributed energy supply technology. Specifically, it is based on compressed air energy storage technology and uses the transcritical characteristics of rare gases to realize heating and cooling as the main and power supply as the auxiliary. Distributed energy systems. Background technique [0002] Electricity, heat, and cold are three important forms of energy that maintain the development and progress of human society. Generally speaking, electric energy is the core energy source of human society, and it is also the form of energy with the most abundant supply. Electric energy can not only be directly supplied to users, but also be converted into heat or cold energy by using other devices. With the improvement of human living standards, human beings have higher requirements for living comfort, so the demand for heat and cold has increased dramatically. Although electric energy can be ...

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Problems solved by technology

Therefore, compressed air energy storage technology has the possibility of realizing combined cooling, heating and power without using fossil fuels.

However, for the medium of compressed air energy storage technology—air, its source is convenient, its reserves are sufficient, and it has certain compressibility. However, due to its low density, high critical pressure and high temperature, when it needs to be compressed to When the pressure is high, the design of the turbomachinery will be complicated and difficult, and the storage volume required when the supercritical state is not reached is also large, so the design of the energy storage system is difficult and the cost is high

At the same time, due to the complex internal components of the air, liquefaction and component separation are prone to occur when expansion refrigeration is performed at low temperature, which affects the operation safety of the system. This is a compressed air energy storage system that uses air as the storage medium for combined cooling, heating and power supply. The main problems faced by the system

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