Solar heat collector based on groove type parabolic mirror and artificial blackbody

Abstract

Provided is a solar heat collector based on a groove type parabolic mirror and an artificial blackbody. Three vacuum heat collecting tubes are arranged in a cavity to reduce reflection loss caused by perpendicular incidence of sunlight and improve the sunlight absorption rate. By utilizing condensation of double-reflecting mirror with groove type paraboloid and ellipsoid, the reflected light can be well focused on the heat collecting tubes, and the coupling degree of the groove type solar heat collector to the sunlight is simultaneously improved. The vacuum heat collecting tubes are installed on the lower portion of a condensation device so that a condensation plate can conveniently trace the sun. In addition, the solar heat collector further has the remarkable advantages that installation is convenient, impact influences of the outside world on a glass tube are small, and liquid leakage caused by rotation of the heat collecting tubes is overcome simultaneously.

Description

technical field [0001] The invention relates to a solar heat collector, in particular to a solar heat collector based on a trough parabolic reflector and an artificial blackbody Background technique [0002] At present, commonly used solar collectors include flat plate collectors, vacuum tube collectors, solar air collectors, and focused solar collectors. Among them, the concentrated solar collector can significantly increase the collection temperature compared with other collectors. [0003] Concentrating solar collectors are mainly divided into two types: point-focused heat collectors and line-focused heat collectors. Although point-focused solar collectors can obtain a high-temperature heat source of hundreds or even thousands of degrees, the cost and cost are relatively high, and it is obvious that such a high temperature is not needed in the field of high-temperature utilization of solar energy, and sometimes it may even cause damage to the absorber. At present, the l...

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Problems solved by technology

[0006] Although the utility model patent CN201037705Y of the People's Republic of China provides a solar heat collector with a reflector, the vacuum heat collection tube of this patent is arranged on the upper part of the trough-type parabolic heat collector, which is inconvenient to install, and the heat collection tube is easily broken by external impact. , and it is not conducive to the rotation of the reflector and the heat preservation of the heat collecting tube

[0007] The solar heat collectors in the prior art all exist: 1. The existing vacuum tube solar heat collectors are installed on the top of the trough-type parabolic reflector through a bracket. Liquid leakage, broken by external impact, etc., and it is not conducive to the rotation of the mirror

2. The existing vacuum heat collecting tube has radiation heat loss to the outside world, and at the same time, there is reflection loss when sunlight shines on the heat collecting tube, resulting in the defect of low utilization rate of sunlight

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