Solar cavity heat absorber with semi-open-type transparent aperture hole cover and method thereof

Abstract

The invention discloses a solar cavity heat absorber with a semi-open-type transparent aperture hole cover and a method of the solar cavity heat absorber. The semi-open-type transparent aperture hole cover is arranged at the position of an opening of the solar cavity heat absorber. The solar cavity heat absorber comprises a cavity heat absorber outer wall thermal insulating material, a heat absorber inner wall face, a heat absorbing pipe and connecting threads. The cavity heat absorber is an open-type cylindrical cavity absorber. The side wall of a cavity heat absorber is successively provided with the solar cavity heat absorber outer wall thermal insulating material, the heat absorber inner wall and the heat absorbing pipe from outside to inside, the heat absorbing pipe is a heat pipe, the connecting threads are arranged at the position of the opening of the cavity heat absorber body, the cavity heat absorber body is connected with the semi-open-type transparent aperture hole cover through the connecting threads, a focal point or a focal plane of a reflector is coincided with the plane center of the opening of the cavity heat absorber. According to the solar cavity heat absorber and the method of the solar cavity heat absorber, the theoretical and experimental basis is provided for optical coordination optimization design of a disc-type solar cavity heat absorber and restraint of convection thermal loss in the practical application. Furthermore, the solar cavity heat absorber and the method of the solar cavity heat absorber play a positive role in promoting scale development of the disc-type power technology.

Description

technical field [0001] The invention relates to a solar energy utilization device, in particular to a solar cavity heat absorber with a semi-open transparent aperture cover and a method thereof. Background technique [0002] The existing dish-type solar thermal power generation system usually consists of three parts: a dish-type parabolic reflector, a cavity heat absorber and a Stirling machine. A large part of the total solar radiation energy received by the system is consumed in the form of heat loss, and the heat loss of the cavity heat absorber accounts for a large proportion of the total heat loss. The heat loss of the cavity heat absorber can be divided into three types from the heat transfer mechanism, namely: convection of high-temperature air in the cavity, radiation through the aperture hole, and heat conduction through the wall of the cavity. The proportion of heat conduction in the total heat loss is very small. Usually, laying a certain thickness of heat-re...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of the large convection loss of the fully open cavity heat absorber, and the cavity receiver with the optical window reduces the total absorption of the solar radiation energy by the cavity, and provides a semi-open transparent aperture Capped solar cavity heat sink and method thereof

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