An electric-thermal-electric energy storage system and method

Abstract

The invention discloses an electric-thermal-electric energy storage system and method, and relates to the technical field of energy storage. The electric-thermal-electric energy storage system comprises: a heat storage device, a heat storage medium is contained in the heat storage device, and the heat storage medium is silicon, when the heat is stored, the silicon changes from a solid state to a liquid state, and when the heat is released, the silicon changes from a liquid state The first air compressor is used to compress the air to 0.15MPa‑0.3MPa, and the first air compressor is connected to the inlet of the heat exchanger, so that the air can be Liquid silicon conducts heat exchange; turbine device, which is connected to the outlet of the heat exchanger; generator, which is connected to the turbine device. The invention can not only ensure the thermal-dynamic conversion efficiency, but also improve the safety of system operation.

Description

technical field

[0001] The invention relates to the technical field of energy storage, in particular to an electric-thermal-electric energy storage system and method. Background technique

[0002] The principle of the electric-thermal-electric energy storage system is: when storing energy, the heat storage medium is heated with electric energy, so as to convert the electric energy into heat energy storage in the heat storage medium; The thermal energy in the energy medium is converted into electrical energy.

[0003] The electrothermal energy storage technology is mature, and there are many optional heat storage media, including various high-temperature heat storage media. The conversion efficiency of electrothermal energy storage is also very high, and the heat loss can be controlled to a very small proportion. However, the conversion efficiency of thermal-electric energy release is not high. In theory, improving this efficiency can be achieved by increasing the heat stora...

Images