Dry heat rock photothermal coupling power generation system with heat storage function and control method system thereof

Abstract

The invention discloses a dry heat rock photothermal coupling power generation system with a heat storage function and a control method system thereof. The dry heat rock photothermal coupling power generation system comprises a dry heat rock circulation subsystem, a photothermal circulation subsystem and a power generation subsystem; the photothermal circulation subsystem includes a photothermal working fluid pump, a heat collector and a heat storage unit; an outlet of the heat collector is divided into two paths, one path is connected to a first inlet of a high temperature heat exchanger, anda first outlet of the high temperature heat exchanger is connected to an inlet of the heat collector; the other path of the outlet of the heat collector is connected to the heat storage unit to be used for storing excess heat when the light is sufficient, and the heat storage unit is also connected to the high temperature heat exchanger to be used for preheating a medium of the high temperature heat exchanger when no illumination exists; and the three systems cooperate and do cycle reciprocation, and continuous power generation of the dry heat rock photothermal coupling power generation system with the heat storage function is achieved. The system effectively solves the problems that pure dry heat rock power generation temperature is low, the photothermal power generation cost is high, and the floor space is large.

Description

technical field [0001] The invention relates to the technical field of renewable energy power generation, in particular to a power generation system coupled with hot dry rock and light and heat and a control method thereof. Background technique [0002] Energy is an important foundation for national economic development. Extensive use of fossil energy such as coal has the following two problems: on the one hand, due to the non-renewability of fossil energy, it will eventually be exhausted over time; on the other hand, the use of fossil energy will produce a large amount of carbon dioxide A large amount of pollutants such as sulfides and nitrogen oxides are produced, causing serious environmental problems. Therefore, the development of new energy to gradually replace traditional fossil energy has become an inevitable trend. [0003] With the diversification of energy use methods, hot dry rock and photothermal resources are becoming more and more popular due to their abundan...

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Problems solved by technology

[0004] Aiming at the problem that hot dry rock and light heat cannot be efficiently utilized and high investment in the prior art, the present invention proposes a new type of heat dry rock light with heat storage function on the basis of fully studying the existing geothermal and solar power generation systems. The thermally coupled power generation system makes full use of the advantages of hot dry rock and photothermal, and effectively solves the problems of low temperature, high power generation cost, and large footprint of pure hot dry rock power generation, and the system is stable, efficient, and environmentally friendly.

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