Thermoelectric energy storage power generation device and power generation method thereof

Abstract

The invention belongs to the technical field of energy storage power generation, and provides a thermoelectric energy storage power generation device and a power generation method thereof. The thermoelectric energy storage power generation device comprises a motor, a transmission mechanism, a refrigerant, heat exchangers, a flywheel and a liquid storage device, wherein heat exchangers are arrangedin a tank A for storing water and a tank B for storing water, a low-temperature heat source tank A, the heat exchangera and a high-temperature heat source tank B form a closed circulating system; when the power grid consumes electricity at low ebb, electric energy is consumed to transfer heat from the low temperature heat source tank A to the high temperature heat source tank B, and the heat is stored in an internal energy form; and at the peak of power utilization of a power grid, a liquid refrigerant is evaporated from the high temperature heat source tank B to become a gaseous refrigerantto push the flywheel to drive an engine to generate power, internal energy is converted into electric energy, and then the gaseous refrigerant is fed into the low temperature heat source tank A to release liquefaction heat to become the liquid refrigerant to be stored for multiple times of recycling. According to the device, power generation is carried out after temperature difference energy storage is carried out in an internal energy form, and the device has the advantages of being small in water storage capacity and small in internal pressure.

Description

technical field [0001] The invention belongs to the technical field of energy storage power generation, and in particular relates to a temperature difference energy storage power generation device and a power generation method thereof. Background technique [0002] At present, the energy storage power generation method generally adopts the conversion of electrical energy into water mechanical energy and stores it. The mechanical energy of water is WK=mgh, where g=9.8N / kg. When the WK is relatively large, the quality of the water is very large, and the water level difference h is relatively large. As far as the current situation is concerned, the larger energy storage power stations have a water storage capacity of tens of millions of cubic meters, a water level difference of up to hundreds of meters, and a hydraulic turbine pressure of 40 to 50 atmospheres. This type of power station requires a large-capacity reservoir and raises the water level by hundreds of meters. Due to...

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Problems solved by technology

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a temperature difference energy storage power generation device and its power generation method, which aims to solve the problem of high internal pressure of the reservoir equipment in the prior art where the power generation method is to convert electric energy into hydromechanical energy and store it. resulting in high cost

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