A two-stage solar heat absorber

Abstract

The invention discloses a two-stage heat-absorbing solar heat absorber, which comprises a cavity, 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 with one end open, and the bottom of the cavity is There is a working medium outlet; the low-temperature heat absorption area is a truncated conical structure; the inner wall of the cavity is provided with an interlayer channel for the air working medium to pass through, and the interlayer channel is located at the edge of the truncated conical structure. The gas entrance enters the interlayer channel where the working fluid flows, passes through the low-temperature heat absorption area, and the low-density solar flow at the edge of the absorption spot is preheated to heat up, and then enters the high-temperature heat absorption area, where the high-density solar flow in the center of the absorption spot reaches a high temperature state, and finally passes through the working fluid The outlet flows out of the heat absorber to complete the light-to-heat conversion. The invention fully considers the Gaussian distribution characteristics of the spot solar flux density, and divides the heat absorber into a low-temperature heat absorption area and a high-temperature heat absorption area, which is beneficial to reducing the radiation heat dissipation loss of the heat absorber and improving the thermal efficiency of the heat absorber.

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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