Tower type solar heat power generation system with double-stage thermal storage

Abstract

The invention relates to the technical field of solar energy thermal power generation and discloses a tower-typed solar energy thermal power generation system with two-stage thermal storage. The system at least comprises a photo-thermal conversion subsystem, a two-stage thermal storage subsystem and a power subsystem; wherein, the photo-thermal conversion subsystem is used for receiving and converging solar radiation energy, converting the received solar radiation energy into heat energy, and transmitting the heat energy to the power subsystem or the two-stage thermal storage subsystem; the two-stage thermal storage subsystem is used for storing the heat energy input by the photo-thermal conversion subsystem and providing the heat energy for the power subsystem when the solar radiation energy is not enough; the power subsystem is used for converting the received heat energy into electrical energy and outputting the electrical energy. By adopting the invention, the problem that the steam is difficult to store is solved, and the difficulty that the running of a steam turbine in the previous tower-typed solar energy thermal power generation proposal by taking the steam as heat absorption working substance is influenced by the unstable and discontinuous solar radiation is overcome.

Description

technical field [0001] The invention relates to the technical field of solar thermal power generation, in particular to a tower-type solar thermal power generation system with two-stage heat storage. Background technique [0002] At present, solar thermal power generation technology has been widely used. The system types and system characteristics of commonly used solar thermal power generation technologies are summarized as follows: [0003] 1. Parabolic trough solar thermal power generation system [0004] The parabolic trough solar thermal power generation system is a form of solar thermal power generation that uses a trough parabolic reflector to meet the requirements of light concentration. The trough parabola faces the sun for one-dimensional tracking, and its light concentration ratio is between 40 and 80. The temperature is generally below 400°C. The system usually consists of concentrating heat collection devices, heat storage devices, power generation devices or...

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Problems solved by technology

[0013] In view of this, the main purpose of the present invention is to provide a tower-type solar thermal power generation system with two-stage heat storage, to solve the problem of difficult steam storage, and to overcome the problem of tower-type solar thermal power generation with steam as the heat-absorbing working medium. Difficulties in the operation of the steam turbine in the scheme affected by the unstable and discontinuous influence of solar radiation

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