Compressed air energy storage system for multi-energy supply

Abstract

The invention relates to the field of energy storage, and provides a multi-energy combined supply compressed air energy storage system. The system comprises multi-stage compressors, multi-stage coolers, multi-stage expansion machines, multi-stage heat regenerators, a high-pressure heat supply device and a low-pressure heat supply device, wherein every two adjacent stages of compressors communicatethrough the interstage coolers, the last-stage compressor communicates with an inlet of an air storage chamber through the high-pressure heat supply device, an outlet of the air storage chamber communicates with an inlet of the first-stage expansion machine through the first-stage heat regenerator, every adjacent stages of expansion machines communicate through the interstage heat regenerators, inlets and outlets of the low-temperature sides of the interstage coolers communicate with a regenerator and a heat accumulator respectively, high-temperature side inlets of the interstage heat regenerators and a high-temperature side inlet of the first-stage heat regenerator communicate with the heat accumulator, high-temperature side outlets of the interstage heat regenerators communicate with the regenerator through the low-pressure heat supply device, and a high-temperature side outlet of the first-stage heat regenerator communicates with the regenerator. According to the system, cooling, heating, electricity and gas combined supply can be realized, the gradient utilization of the heat energy of different grades can further be realized, and dynamic changes of loads can be met.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a multi-energy combined supply compressed air energy storage system. Background technique [0002] Distributed Energy System (DES for short) has developed into a mature comprehensive energy utilization technology in many countries and regions. DES has been widely concerned and favored by governments and business circles due to its characteristics of cascade utilization, high energy utilization efficiency, environmental friendliness, safe and reliable supply, and proximity to users. An important form of DES is Combined Cooling heating and power (CCHP). [0003] At present, small-scale combined energy generation systems such as CCHP have differences in energy supply and demand during operation. The above-mentioned differences can be divided into two types: one is caused by changes in energy demand, that is, the external demand exceeds the supply; the other is caused by the...

AI Technical Summary

Problems solved by technology

However, the existing multi-energy cogeneration system lacks energy storage support, and cannot regulate or buffer when the load exceeds the supply, and cannot achieve energy supply balance when the demand exceeds the supply.

Therefore, the efficiency of the existing multi-energy cogeneration system will drop significantly when responding to changes in load demand on the user side

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