Electric heating energy storage poly-generation system

Abstract

The invention discloses an electric heating energy storage poly-generation system comprising a heat pump system, a heat and cold storage system, a heat supply system, a refrigeration system and a power generation system. The heat pump system comprises a motor, a compressor, a heat storage heat exchanger and a cold storage heat exchanger. The heat and cold storage system comprises a high-temperature storage tank, a normal-temperature storage tank and a low-temperature storage tank. By means of the system, the renewable energy source electricity or electricity generated when the electrical network load is at the trough can be stored in the form of heat and coldness, and meanwhile, the stored heat or coldness can be used for conducting heating, refrigeration and power generation.

Description

technical field [0001] The invention belongs to the field of energy storage and heat exchange, and relates to an electrothermal energy storage polygeneration system. Background technique [0002] In recent decades, renewable energy such as wind energy, solar energy, and tidal energy has developed rapidly as a clean energy source, and its proportion in the world's energy structure is getting higher and higher. The installed capacity of renewable energy in my country has increased rapidly. However, renewable energy such as wind energy and solar energy have discontinuous, unstable, and uncontrollable unsteady characteristics. The large-scale grid connection of wind power and photovoltaic power generation will have an impact on the stability and safe operation of the power grid. The combination of large-scale energy storage technology and renewable energy power generation system can stabilize the output of renewable energy power generation and reduce the impact of renewable ene...

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Problems solved by technology

But the CO that needs to be used in these two schemes 2 The technology of expander or inert gas compressor and expander is not yet mature, which makes it difficult for the efficiency of electric thermal energy storage power generation system to reach the expected 60% in practical applications

[0004] If a part of the stored heat or cold is directly used to meet the heating and cooling needs of life or production, the amount of power generation can be reduced, thereby reducing the energy loss in the process of power generation, and improving the cycle efficiency of electric thermal energy storage as a whole. However, there is no relevant record in the prior art

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