Brayton heat pump electricity storage system based on thermochemical energy storage

Abstract

The invention provides a Brayton heat pump electricity storage system based on thermochemical energy storage, which comprises a refrigeration heat energy loop for generating cold energy and heat energy by means of electric energy; the heat storage unit corresponds to the refrigeration heat energy loop and is used for storing heat energy; the cold storage unit is arranged corresponding to the refrigeration heat energy loop, and the cold storage unit is used for storing cold energy; the regenerative heat exchanger is arranged corresponding to the heat storage unit and the cold storage unit; the regenerative heat exchanger is used for conducting heat exchange on heat energy lower than the target temperature on the heat storage side and cold energy higher than the target temperature on the cold storage side. And the cold and heat energy power generation loop is arranged corresponding to the heat storage unit and the cold storage unit, and the cold and heat energy power generation loop is suitable for absorbing heat energy in the heat storage unit and cold energy in the cold storage unit and generating power. Under different power utilization working conditions, cold and heat energy and electric energy are mutually converted, the cost is low, the energy storage density is high, the safety is high, the structure is compact, pollutants are not generated, and energy conservation and environment protection are achieved.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a Brayton heat pump power storage system based on thermochemical energy storage. Background technique [0002] At present, the existing power energy storage technologies include pumped water energy storage, compressed air energy storage, battery energy storage, superconducting magnetic energy, flywheel energy storage and supercapacitors. Among them, physical energy storage represented by pumped water storage, thermal energy storage and compressed air energy storage is suitable for large-scale commercial applications due to its low cost and large energy storage capacity, accounting for about 90% of the world's total energy storage above. [0003] The traditional compressed air energy storage system compresses the air and stores it in the gas storage chamber during the low electricity consumption, so that the electric energy is converted into the internal energy of the air ...

AI Technical Summary

Problems solved by technology

[0004] The traditional compressed air energy storage system has the advantages of large energy storage capacity, long energy storage period, high efficiency (50%-70%), and relatively small unit investment; however, it relies on burning fossil fuels to provide heat sources. The threat of gradual depletion and rising prices, on the other hand, its combustion still produces pollutants such as nitrogen compounds, sulfides and carbon dioxide, which does not meet the requirements of green (zero emission) and renewable energy development

Images