Secondary light concentration device and system as well as solar thermal power generation system provided with system

Abstract

The invention relates to a secondary light concentration device which comprises a plurality of petal-shaped light concentration modules which are circumferentially distributed and integrally fitted into a light concentration surface; the focal lengths of the light concentration modules can be flexibly adjusted through a light concentration module adjusting assembly to realize a modularized focal-length-adjustable function of a secondary reflection light-concentration curve, and therefore the flexibility of the secondary light concentration device is improved, the installation precision requirement is reduced, and the installation and maintenance cost is decreased. The invention also relates a secondary light concentration system provided with the secondary light concentration device; the secondary light concentration system is provided with a single-column-type support structure at one side of the secondary light concentration device so that the shielding problem is effectively solved, and therefore the available range of a ground heliostat is greatly increased; in addition, by means of a secondary light concentration device inclination adjusting assembly of the secondary light concentration system, a variable optical axis function of the secondary light concentration device is realized, and therefore the requirements of target surfaces of various angles of heat absorbers are met, and the adaptation capability and the application range of the secondary light concentration system are greatly increased. The invention also relates to a solar thermal power generation system provided with the secondary light concentration system.

Description

technical field [0001] The present invention relates to the technical field of solar energy utilization equipment, in particular to the technical field of solar concentrating devices, and specifically refers to a secondary concentrating device, a secondary concentrating system and a solar thermal power generation system with the system. Background technique [0002] The existing solar thermal power generation systems mainly include three basic types: trough line focusing system, tower system and dish system. The secondary reflection solar thermal power generation system is an improved solution based on the traditional tower solar thermal power generation system. Because the traditional tower system installs the heat absorber on the top of the tower tens of meters high, the convection and radiation losses are relatively large, and the installation and maintenance costs of the heat absorber are high, so a hyperboloid type can be installed at a relatively short position The se...

AI Technical Summary

Problems solved by technology

[0004] The existing secondary reflection system uses three or more huge columns as the main support structure of the secondary reflection system. The disadvantage is that such a support structure will inevitably bring about a large occlusion problem, or create a partial ground position. Unable to arrange heliostat problem

This is a huge constraint on the utilization efficiency of the secondary reflection system

[0005] At the same time, the existing secondary reflection system usually adopts a fixed installation method. Once the hoisting is completed, its optical surface cannot be adjusted easily, or the adjustment requires a lot of maintenance time and manpower, which undoubtedly reduces the impact of the secondary reflection system on installation errors. Adaptability will increase installation and maintenance costs accordingly

[0006] In addition, the optical axis of the existing secondary reflection system is fixed along the vertical direction. Only when an asymmetric mirror field is used in high latitude areas, it is possible to set the optical axis obliquely. The design has higher requirements, and its heat absorbing surface or entrance plane must be horizontal, which cannot meet the requirements of the target surface of the heat absorber at other angles.

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