Electricity-heat-electricity energy storage system and method

A technology of electric energy storage and heat storage, which is applied in the field of energy storage, can solve the problems of low heat-electric energy conversion efficiency, and achieve the effects of ensuring heat-dynamic conversion efficiency, improving thermal efficiency, and improving safety

Active Publication Date: 2021-03-23
SHANGHAI POWER EQUIP RES INST
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Problems solved by technology

However, the conversion efficiency of heat-electric energy is not high. In theory, improving this efficiency can be achieved by increasing the heat storage temperature and / or increasing the pressure of the working medium. However, the heat storage temperature of the existing heat storage medium is between 800°C-900°C, if the pressure of the working medium is too high, the thermal conversion device will be subjected to greater pressure, which will bring great challenges to the thermal conversion device

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  • Electricity-heat-electricity energy storage system and method

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Embodiment Construction

[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a d...

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Abstract

The invention discloses an electricity-heat-electricity energy storage system and method, and relates to the technical field of energy storage. The electricity-heat-electricity energy storage system comprises a heat storage device, a first air compressor, a turbine device and a generator, wherein the heat storage device is filled with a heat storage medium, the heat storage medium is silicon, during heat storage, silicon is converted into a liquid state from a solid state, during heat release, silicon is converted into a solid state from a liquid state, and a heat exchanger is further arrangedin the heat storage device; the first air compressor is used for compressing air to 0.15 MPa to 0.3 MPa, and the first air compressor is connected with an inlet of the heat exchanger, so that heat exchange between the air and the liquid silicon is facilitated; the turbine device is connected with an outlet of the heat exchanger; and the generator is connected with the turbine device. According tothe electricity-heat-electricity energy storage system, the thermodynamic conversion efficiency can be ensured, and the operation safety of the system can be improved.

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, use electric energy to heat the heat storage medium, thereby converting electric energy into heat energy stored in the heat storage medium; The thermal energy in the energy medium is converted into electrical energy. [0003] Electrothermal energy storage technology is mature, and there are many kinds of heat storage media to choose from, including various high-temperature heat storage media. The conversion efficiency of electric-thermal energy storage is also very high, and the heat loss can be controlled to a very small ratio. However, the conversion efficiency of heat-electric energy is not high. In theory, improving this efficiency can be achieved by increasing the heat storage temper...

Claims

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Application Information

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IPC IPC(8): F28D20/00F01D15/10
CPCF28D20/00F01D15/10Y02E60/14
Inventor 郑开云张天博蒋励
Owner SHANGHAI POWER EQUIP RES INST
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