Revolution paraboloid type solar power collecting device adopting two times of point focusing

Abstract

The invention relates to a revolution paraboloid type solar power collecting device adopting two times of point focusing. The revolution paraboloid type solar power collecting device comprises a heat collector, a secondary condenser and a bracket; the heat collector comprises a primary condenser and a heat collecting tube; the primary condenser is a revolution paraboloid reflecting mirror; the secondary condenser is a revolution paraboloid reflecting mirror or a circular fresnel reflector; the heat collecting tube is located between the primary condenser and the secondary condenser, and is located at focus points of the primary condenser and the secondary condenser simultaneously; and the bracket is used for supporting the primary condenser, the secondary condenser and the heat collecting tube. According to the revolution paraboloid type solar power collecting device, the secondary condenser is additionally adopted, and the revolution paraboloid reflecting mirror is arranged at the lower surface of the secondary condenser, the heat collector is located between the secondary condenser and the primary condenser and is located at the focus point of the secondary condenser, sunlight transmitting through the heat collector can be reflected to the revolution paraboloid reflecting mirror and then focused on the heat collector, so that the light loss is little, and the heat collecting efficiency is high.

Description

technical field [0001] The invention relates to a rotating parabolic solar energy collection device with double point focusing, in particular to a solar energy collection device with high light-to-heat conversion efficiency. Background technique [0002] The heat collector is a device that controls the optical path of radiated parallel rays through the reflective surface, increases the heating power of the object, and thereby increases the temperature of the object. From the perspective of optical path control and focusing, there are two types of focusing and non-focusing; among them, the heating power of the focusing collector is greater than that of the non-focusing collector, which can achieve a higher heating temperature. For focusing collectors, there are mainly two types: line focusing and point focusing. Line focusing means that parallel light rays are focused into a line; point focus means that parallel light rays are focused into a point shape. [0003] Condensatio...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in order to solve the problem of high unit cost and low heat collection efficiency of existing medium-temperature solar collectors, the present invention provides a rotating parabolic solar collector with double point focusing. On the basis of the existing technology, a secondary concentrator is added. The secondary concentrator is a rotating parabolic reflector or a circular Fresnel reflector. The heat collecting tube is located between the secondary concentrator and the primary concentrator. At the same time, it is at the focal point of the secondary concentrator and the primary concentrator, which can reflect the sunlight passing through the heat collecting tube to the primary concentrator again, and gather it again to the heat collector. High thermal efficiency

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