A vertical heat absorber device for Fresnel solar thermal power generation

Abstract

The invention discloses a Fresnel solar thermal power generation vertical heat absorber device. The Fresnel solar thermal power generation vertical heat absorber device comprises supports. Reflectors of a Fresnel lens field are connected to the supports. A heat absorber is composed of different sections of vertical tube screens in the parallel length direction of the reflectors and is connected to the supports through a heat absorber frame. A medium inlet primary tube is communicated with an inlet of the heat absorber, an outlet of the heat absorber is communicated with a medium outlet primary tube, the front face and the back face of the heat absorber are coated with solar absorption coatings respectively, and solar heat is absorbed by the heat absorber. The heat absorber comprises one or more heat absorber vertical tubes connected in parallel or in series, the upper portions of the heat absorber vertical tubes are connected with the inlet of the heat absorber through a heat absorber inlet header, and the lower portions of the heat absorber vertical tubes are connected with the outlet of the heat absorber through a heat absorber outlet header. The solar heat generated by reflecting solar heat incident light is absorbed through the heat absorber vertical tubes to heat media in the heat absorber vertical tubes. According to the Fresnel solar thermal power generation vertical heat absorber device, micro-circulation for preventing condensation is not needed, and the pump power and the heat dissipation losses are saved.

Description

Technical field [0001] The invention belongs to the technical field of solar thermal power generation, and particularly relates to a Fresnel solar thermal power generation vertical row heat absorber device. Background technique [0002] Solar thermal power generation is to focus the direct solar light on the heat absorber, and then heat the working fluid in the heat absorber to directly or indirectly generate steam, which enters the conventional steam turbine generator set to generate electricity. Solar thermal power generation has attracted more and more attention due to its ability to store heat and stable operation. [0003] The typical heat absorber for solar Fresnel thermal power generation is a vacuum or non-vacuum coated single steel pipe, or a pipe with windproof glass, which has single-sided heating, large heat dissipation, long pipelines, and cannot rely on gravity to return when it is out of service. problem. The tower solar heat absorber is a vertical cylindrical tube...

AI Technical Summary

Problems solved by technology

[0003] Typical solar Fresnel thermal power generation heat absorbers are vacuum or non-vacuum coated single steel pipes, or pipes with windshield glass, which have single-sided heating, large heat dissipation, long pipelines, and cannot rely on gravity backflow during shutdown, etc. question

The tower solar heat absorber is a vertical cylindrical tube panel with a large concentration ratio, and the focus temperature can reach about 1000°C. However, the current steam only needs about 550°C, and the excessive temperature margin will increase and become irreversible. loss and heat loss, and the tower heat sink puts higher requirements on the dual-axis tracking of the mirror field control, resulting in increased investment costs

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