Concentric sleeve type solar isothermal heat absorber

Abstract

The invention discloses a concentric sleeve type solar isothermal heat absorber which comprises a heat absorber body. A working medium inlet and a working medium outlet are formed in the heat absorberbody; the heat absorber body comprises a bottom plate; the working medium inlet and the working medium outlet are formed in the lower surface of the bottom plate; multiple concentrically arranged sleeves are arranged on the upper surface of the bottom plate, and are in cylindrical shapes; axes of the sleeves are perpendicular to the bottom plate; the upper ends of the sleeves are sealed through transparent glass; a center cavity is formed in the sleeve on the innermost circle; an annular cavity is formed between each two adjacent sleeves; the working medium inlet communicates with the inner part of the center cavity; the working medium outlet communicates with the inner part of the annular cavity on the outermost circle; multiple uniformly arranged small holes are formed in side walls ofthe sleeves except for the sleeve on the outermost circle; and the small holes in side walls of each two adjacent sleeve pipes are arranged in a staggering way. According to the concentric sleeve typesolar isothermal heat absorber provided by the invention, a working medium firstly enters the center cavity area with the highest solar energy flux density to absorb heat and then flows and diffusestoward a marginal area with lower energy flux density layer by layer, so that isothermal heat absorption is realized.

Description

technical field [0001] The invention relates to the field of solar energy devices, in particular to a concentric casing type solar energy isothermal heat absorber. Background technique [0002] Solar energy is a renewable clean energy. The development and utilization of solar energy resources is of great significance to energy conservation and emission reduction, and to promote the construction of ecological civilization. Solar thermal absorber is one of the key equipment of solar thermodynamic power generation, thermochemical reaction and other systems. According to different functional requirements, there are many solar heat absorber schemes that have been proposed at present. [0003] Existing solar heat absorbers are mainly designed for the non-uniform distribution of concentrated solar flux density, and use concentrated high-density solar flux to add working fluid to complete the conversion of solar radiation energy into high-temperature internal energy of the working...

AI Technical Summary

Problems solved by technology

Due to insufficient consideration of the flow path design of the working fluid and its flow control method, the flow rate of the working medium in the heat absorbing area with high energy flow density of the heat absorber is small, the heat transfer effect is poor, local high temperature occurs, the thermal efficiency is low, and the safety and reliability are poor.

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