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An electric-thermal-electric energy storage system and method

A technology of electric energy storage and heat storage, applied in the field of energy storage, can solve the problem of low heat-electric energy conversion efficiency, achieve the effect of ensuring heat-dynamic conversion efficiency and improving safety

Active Publication Date: 2022-07-15
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

Method used

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  • An electric-thermal-electric 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 more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

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

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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...

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Application Information

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Patent Type & Authority Patents(China)
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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