Fixing device for secondary reflection mirror of linear Fresnel heat absorber

Abstract

The invention discloses a fixing device for a secondary reflection mirror of a linear Fresnel heat absorber. The fixing device comprises a supporting framework. An installation hole is formed in a bottom face beam of the supporting framework, and the secondary reflection mirror is connected with the bottom face beam through a connecting piece penetrating through the installation hole. A plurality of vertical plates are erected between top beams of the supporting framework, fixing buckles are arranged on the back face of the secondary reflection mirror, passing holes formed in the fixing buckles and channels formed in the vertical plates are connected through longitudinal rods in a cascading mode, the longitudinal rods can move in the channels in the direction perpendicular to the length direction, and the fixing buckles can slide on the longitudinal rods in the length direction. By means of the fixing device, enough expansion space can be provided for the secondary reflection mirror, deformation can be controlled, adverse effects brought when the secondary reflection mirror of the linear Fresnel heat absorber expands after being heated can be reduced, the stability and reliability of the heat absorber can be improved, and a good condensation effect can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of solar thermal power generation, and relates to a fixing device for a secondary reflector of a linear Fresnel heat absorber. Background technique [0002] Solar thermal power generation technology uses concentrators to gather solar energy and convert it into heat energy, and then generate high-temperature and high-pressure steam to drive steam turbines to generate electricity. Linear Fresnel-type solar concentrating thermal power generation technology is a common form of solar thermal power generation at present. The primary mirror field composed of multi-faceted linear mirrors converges the sunlight into a linear spot, and then uses the receiver to pass through the heat transfer fluid. The high temperature generated by the light is absorbed and transferred to the heat exchanger. In the heat exchanger, the heat of the heat transfer fluid is used to heat the water to generate water vapor, and then use the ...

AI Technical Summary

Problems solved by technology

If there is not enough expansion space left on the installation structure, it will affect the surface shape accuracy of the secondary reflector, reduce the secondary light-gathering efficiency, and seriously may cause damage to the secondary reflector

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