Two-stage solar heat absorber

Abstract

The invention discloses a two-stage heat absorber. The two-stage heat absorber comprises a cavity, wherein the cavity is divided into a low-temperature heat absorbing area and a high-temperature heat absorbing area, the high-temperature heat absorbing area is cylindrical, one end of the high-temperature heat absorbing area is open, a working medium outlet is formed in the bottom end of the cavity, the low-temperature heat absorbing area is of a circular truncated cone structure, an interlayer channel is formed in the inner wall of the cavity, an air working medium passes through the interlayer channel, an air working medium inlet is formed in the portion, located on the edge of the circular truncated cone structure, of the interlayer channel, the working medium enters the interlayer channel where the working medium flows through the working medium inlet, absorbs low-density solar energy flow on the edge of a light spot so as to be pre-heated after passing through the low-temperature heat absorbing area, absorbs the high-density solar energy flow in the center of the light spot so as to be in the high-temperature state after entering the high-temperature heat absorbing area and finally flows out of the heat absorber through the working medium outlet, and thus light-heat conversion is completed. According to the two-stage heat absorber, the density Gaussian distribution characteristic of the solar energy flow of the light spot is fully considered, the heat absorber is divided into the low-temperature heat absorbing area and the high-temperature heat absorbing area, in this way, radiant heat loss of the heat absorber can be reduced, and the heat efficiency of the heat absorber is improved.

Description

technical field [0001] The invention relates to the technical field of solar energy applications, in particular, the invention relates to a two-stage solar heat absorber. Background technique [0002] Solar energy is an abundant and clean energy source. The development and utilization of solar energy resources is very important for energy conservation, emission reduction and improvement of ecological environment. The solar heat absorber converts concentrated sunlight into a high-temperature heat source, heats the working medium to do work or drives a chemical reaction, and is the core device of the solar high-temperature heat conversion system. According to different functions that can be realized, there are many solar heat absorber schemes that have been proposed at present. [0003] On the website of the State Intellectual Property Office of the People's Republic of China, 7 patents related to the present invention were found, and the specific information is as follows: ...

AI Technical Summary

Problems solved by technology

The current structural design of solar heat absorbers focuses on the enhanced heat transfer of the working medium (referred to as working fluid) inside the heat absorber, and the Gaussian distribution characteristics of the concentrated solar energy flow density are not considered deeply enough, resulting in poor practicability of the heat absorber

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