Composite bed solid particle heat storage and release system based on cooperative storage of valley electricity and abandoned electricity

Abstract

The invention discloses a composite bed solid particle heat storage and release system based on cooperative storage of off-peak electricity and abandoned electricity, and belongs to the technical field of electric energy storage systems in the energy power industry. A first electric heater takes new energy abandoned electricity or low-price off-peak electricity as input energy, adjusts the electric heating power, heats normal-temperature air into high-temperature air, and sends the high-temperature air to a second electric heater; high-temperature air and a second electric heater are used for cooperatively heating solid particles in the composite bed heat storage and release device, and heat energy storage of the high-temperature solid particles is achieved. The output medium-temperature air is used for heating normal-temperature water in the water storage tank, so that stepped heat storage is realized; normal-temperature air output by the normal-temperature air supply module exchanges heat with the high-temperature particles in a first mode or a second mode to generate high-temperature air; high-temperature air is converted into hot water, hot air and steam through the composite heat exchanger and the evaporation heat exchanger, and multi-element release of heat energy is achieved. According to the invention, various heating power such as hot water, hot air and steam is generated by using new energy abandoned electricity or low-price off-peak electricity stored and discharged energy of a power grid, and high-efficiency and low-cost supply is realized.

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