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

Abstract

The invention discloses a compressed gas distributed energy system using a rare gas as a working medium. The system takes the user's demand for heat and cooling capacity as the main goal, and utilizes the process heat generated by the compressed gas and the low-temperature cooling capacity caused by gas expansion. Complete the supply of heat and cold, and at the same time auxiliary output a certain amount of electricity. The system uses rare gases as working fluids, and with the help of rare gas gaseous state-supercritical state-gas state changes, it effectively reduces the difficulty of system design, reduces the cost of the energy storage system, and ensures the safety and stability of the system operation; at the same time, it uses The switching of the valve realizes the change of the number of the system, and controls the cold, hot and electric output of the system, so as to realize the balance between the supply and demand of cold and heat. The system can be used in conjunction with renewable energy such as wind energy and solar energy, and does not produce other pollutants during operation, and has better energy-saving and environmental protection 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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