Solar tower type heat absorber with double-tube structure and design method for solar tower type heat absorber

Abstract

The invention discloses a solar tower type heat absorber with a double-tube structure and a design method for the solar tower type heat absorber. The solar tower type heat absorber comprises necessary parts of outer ring heat absorbing tubes, inner ring heat absorbing tubes, a sealing fin and the like. According to the design requirements of the heat absorber, a certain gap is formed between two adjacent outer ring heat absorbing tubes or between the outer ring heat absorbing tubes and the inner ring heat absorbing tubes; the inner ring heat absorbing tubes are connected into a group through a closely-packed structure or a fin structure, so that sealing and heat transfer effects are achieved on sunlight received by the heat absorber. According to the solar tower type heat absorber disclosed by the invention, the wall temperature difference of phototropic surfaces and backlight surfaces of heat absorbing tubes is effectively reduced, the stress borne by the heat absorbing tubes can be reduced, the safety of the heat absorber is improved, and the service life of the heat absorber is prolonged; selection requirements on a heat absorber tube sub material can be reduced by reducing the front-rear wall temperature difference, so that the initial investment cost of the heat absorber can be greatly reduced. The heat absorber can improve heat flux density and average heat flux density allowed by the surface, so that the appearance dimension of the heat absorber can be reduced, and the efficiency of the heat absorber is improved.

Description

technical field [0001] The invention relates to a solar tower heat absorber with a double column tube structure and a design method thereof, belonging to the technical field of high temperature heat utilization of solar energy. Background technique [0002] Solar high-temperature thermal power generation technology is an important direction for large-scale utilization of solar energy, which has far-reaching significance for human beings to solve problems such as fossil energy crisis and air pollution. According to different focusing methods, solar high-temperature thermal power generation can be divided into three types: dish type, trough type, and tower type; the working fluids used are water (steam), molten salt, air, heat transfer oil, liquid metal, other organic substances, etc. . Tower focusing has attracted the attention of many countries in the world due to its advantages of large capacity and high parameters. [0003] The tower thermal power generation technology i...

AI Technical Summary

Problems solved by technology

Coupled with the inherent characteristics of solar intermittency and variability (influenced by factors such as cloud cover, etc.), it is easy to cause the rupture and failure of the heat absorber tube, thus affecting the safe operation of the entire solar tower thermal power generation system

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