Solid series heat pump cycle energy storage method and device

Abstract

The invention provides a solid tandem heat pump type circulating energy storage method and a solid tandem heat pump type circulating energy storage device. The solid tandem heat pump type circulatingenergy storage method comprises an energy storage mode, a power generation mode and a heat energy comprehensive utilization mode. When the energy storage mode is adopted, a normal-temperature workingmedium is subjected to adiabatic compression through a compressor, is subjected to isobaric heat release by a solid heat storage system, enters a turbine to perform adiabatic expansion to do externalwork and is subjected to isobaric heat absorption by a solid cold storage system; the normal-temperature working medium returns to the compressor and the above process is repeated; a flow control valve, the compressor, the solid heat storage system, the turbine and the solid cold storage system are arranged on the solid tandem heat pump type circulating energy storage device sequentially along thewalking direction of the working medium and form a loop. The power generation mode and the heat energy comprehensive utilization mode are opposite to the energy storage mode. Through the efficient solid tandem heat pump type circulating energy storage method and device, the problem of wind abandoning and light abandoning in photovoltaic power generation and wind power generation as well as the problem of peak shaving of power grid peak valley electricity is solved, electricity and heat are supplied efficiently, or heat energy comprehensive application of heating, cooling and the like is provided while power is supplied.

Description

technical field [0001] The invention relates to an energy storage method and its device, in particular to a solid series heat pump cycle energy storage method and device. Background technique [0002] With the development of science and technology and the progress of industry, modern society is increasingly inseparable from energy based on electric energy, and the mismatch between supply and demand of electric energy often leads to a lot of waste. From the perspective of electric energy supply, solar energy and wind energy are the representatives. Green energy is a long-term trend in energy development. However, because green energy is generally affected by natural conditions such as weather, seasons, and sunshine, it is difficult to provide stable energy output, so it is difficult to output electricity that matches the grid. Therefore, the problems of abandoning wind and light in green energy are very serious at this stage. On the other hand, from the perspective of electr...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of low conversion efficiency of the traditional electric heating heat storage medium energy storage method, and at the same time overcome the problems of wind and light abandonment in photovoltaic power generation and wind power generation, as well as the peak-shaving and valley-filling problems of peak and valley electricity, and provide A solid series heat pump cycle energy storage method and device for comprehensive utilization of energy storage

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