A solar heat storage and closed cycle coupled power generation system

Abstract

The invention discloses a solar heat storage and closed cycle coupling power generation system, which includes a solar heating unit and a compression expansion power generation unit, wherein the solar heat collection device absorbs solar heat as a heat source and stores excess heat through the heat storage device It is used in night and other non-sunlight conditions, so as to achieve the effect of energy storage. Its power generation process is similar to that of a gas turbine, except that the combustion chamber is replaced by a waste heat recovery device and a high-temperature heat exchanger. At the same time, the waste heat recovery device and a low-temperature heat exchanger are used to cool down the expanded gas, thereby improving the operating efficiency of the device. Because the present invention adopts a closed cycle, the impurity content is less in the operation process, which can reduce the harm to the unit caused by the moisture and salt content of the working medium. The present invention greatly reduces the space of the gas collection chamber because the energy is stored in the heat storage mode of the heat conduction oil. The present invention is suitable for use in scenarios where power grids are difficult to reach and require relatively large power, such as power grid peak regulation or frontiers and sea islands.

Description

technical field [0001] The invention belongs to the field of energy storage, and relates to a coupling utilization device of solar energy and closed cycle power generation, specifically a solar heat storage and closed cycle coupled power generation system, which utilizes a solar heat collection device, a compression expansion power generation system and a storage The thermal device is used to store and release energy. It has the characteristics of high energy storage density, simple device, and low system cost. It is suitable for grid peak shaving or frontiers and islands and other scenarios where the grid is difficult to reach and requires high power. Background technique [0002] In recent years, in order to solve the grid-connection problems of peak-shaving and valley-filling of power grids and intermittent power resources such as solar energy, more and more attention has been paid to compressed air energy storage technology. The cost of the new storage tank buffer device...

AI Technical Summary

Problems solved by technology

The consistency of the battery unit has a major impact on its lifespan. At the same time, when the load changes, the short-term large power output will cause the crystallization of the battery crystal, which will have an adverse effect on the battery life.

The above factors also restrict the application and promotion of solar photovoltaic power generation

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