Non-supplemental-combustion type compressed air energy storage system

Abstract

The invention relates to the field of electric energy storage, in particular to a non-supplemental-combustion type compressed air energy storage system. The system comprises a high-temperature compressor unit, a gas storage device, a turbine generator unit and a heat regeneration system. The inlet of the gas storage device is connected with the high-temperature compressor unit to store high-pressure gas compressed by the high-temperature compressor unit; the outlet of the gas storage device is connected with the turbine generator unit and provides the compressed air for power generation of the turbine generator unit; the heat regeneration system comprises coolers, a high-temperature heat transfer medium storage device, a low-temperature heat transfer medium storage device and heat regeneration devices. By the adoption of the high-temperature compressor, compression heat temperature can be made to reach 250-360 DEG C; high-efficiency heat storage and heat regeneration are adopted, then the temperature of the compressed gas entering the turbine generator unit is increased, and therefore the efficiency of energy storage is improved.

Description

technical field [0001] The invention relates to the field of electric energy storage, in particular to a non-supplementary combustion compressed air energy storage system. Background technique [0002] In recent years, under the dual pressure of the global energy crisis and environmental pollution, human beings are forced to rethink the form of energy utilization. The "third industrial revolution" centered on clean energy and energy network interconnection and the gradual promotion of related technologies have made the comprehensive utilization of wind, light, water and other clean energy a consensus to solve global energy and environmental problems. In this context, renewable energy such as wind power and photovoltaics has developed rapidly. However, the intermittent volatility of renewable energy such as wind power and photovoltaics has brought great challenges to the operation control and optimal scheduling of existing power systems. Achieving large-scale storage of elec...

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Problems solved by technology

However, the existing non-supplementary combustion compressed air energy storage system mainly uses low-temperature compressors to compress air, and the heat obtained from the air is insufficient; and water is used as the heat recovery medium, so the heat storage efficiency is not high; in addition, the gas storage tank is used to store gas , it is not convenient for large-scale energy storage

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