An electrothermal energy storage system

Abstract

The invention discloses an electrothermal energy storage system. The electrothermal energy storage system comprises a heat pump system, a heat-storage and cold-storage system and a heat engine system, wherein the heat pump system comprises a motor, a compressor, a heat-storage heat exchanger and a cold-storage heat exchanger; and the heat-storage and cold-storage system comprises a low-temperature storage tank, a high-temperature storage tank and a normal-temperature storage tank. By the system, electric power can be stored. Moreover, the electrothermal energy storage system is small in occupied space, does not depend on petrochemical fuels, and has little influence on an ecological environment.

Description

technical field [0001] The invention belongs to the field of energy storage and relates to an electrothermal energy storage system. Background technique [0002] my country's coal-based energy structure has supported the economic take-off since the reform and opening up. However, coal resources are non-renewable and will cause serious environmental pollution during the utilization process. Therefore, gradually increasing the proportion of renewable energy in my country's energy structure will be The general trend. In the past ten years, the installed capacity of renewable energy such as wind energy and solar energy in my country has increased rapidly. However, renewable energy such as wind energy and solar energy is random, intermittent, and unstable. The large-scale grid integration of wind power and photovoltaic power generation will have an impact on the stability and safe operation of the grid. The combination of renewable energy power and large-scale energy storage sys...

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Problems solved by technology

Generally speaking, the development potential of pumped hydro storage in the future is limited by the lack of suitable locations and the greater impact on the ecological environment. There are many locations where compressed air energy storage can be built, but compressed air energy storage requires the consumption of fossil fuels

Although the adiabatic compressed air energy storage technology currently being developed can no longer rely on fossil fuels, the high temperature and high pressure storage technology still needs to make great progress, so there is an urgent need for a small footprint, does not rely on fossil fuels, and has little impact on the ecological environment The electric energy storage system realizes the energy storage of electric power

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