Supercritical carbon dioxide circulation coupled compressed air energy storage power generation system and method

Abstract

The invention relates to the field of energy conversion and provides a supercritical carbon dioxide circulation coupled compressed air energy storage power generation system and method in order to solve the problems that in the prior art, during the compressed air energy storage and utilization process, the storage difficulty is large and energy is utilized insufficiently through a secondary release power generation utilization method. The system comprises an air compressor, a first-stage heat exchanger, a high-pressure vessel for storing gas, a second-stage heat exchanger, a low-temperature heat storage tank, a high-temperature heat storage tank, a first-stage air turbine, an intermediate heat exchanger, a second-stage air turbine, an S-CO2 turbine, an S-CO2 heat regenerator, an S-CO2 gascompressor and an S-CO2 heat source heater. The air compressor compresses the air, then stores heat in a heat conduction medium and stores high-pressure air into the high-pressure vessel. When needing to be released, the high-pressure air is heated to drive the air turbine to generate electricity, and meanwhile, outlet gas in an S-CO2 cycle heats the air in a compressed air power generation channel. The supercritical carbon dioxide circulation coupled compressed air energy storage power generation system has the beneficial effects of being reasonable in compressed air energy storage and highin secondary release energy utilization rate.

Description

technical field [0001] The invention relates to the field of energy conversion, in particular to a compressed air energy storage power generation system and method coupled with a supercritical carbon dioxide cycle. Background technique [0002] Compressed air energy storage can use excess electrical energy to compress air, and temporarily convert electrical energy into air compression / heat energy for storage, so that it can be released and converted into electrical energy when needed. [0003] In the storage and reuse of energy in the prior art, there are problems such as high difficulty in storage and insufficient utilization of energy in the way of re-release for power generation and utilization. Contents of the invention [0004] The purpose of the present invention is to provide a compressed air energy storage power generation system coupled with a supercritical carbon dioxide cycle to solve the problem that in the existing compressed air energy storage and utilization...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a compressed air energy storage power generation system coupled with a supercritical carbon dioxide cycle to solve the problem that in the existing compressed air energy storage and utilization process, the storage is difficult and the energy utilization in the way of releasing power generation and utilization is not sufficient question

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