Novel solar heat collection pipe with built-in heat absorber

Abstract

The invention discloses a novel solar heat collection pipe with a built-in heat absorber. The novel solar heat collection pipe comprises the heat absorber, a black paint coating, heat transferring media, an inner-layer glass sleeve, an outer-layer glass sleeve, a selective penetration layer and the like. The black paint coating is coated on an outer side surface of the heat absorber; the heat absorber is arranged in the heat transferring media and the heat transferring media are arranged on inner and outer sides of the heat absorber; a narrow air layer is formed between the inner-layer glass sleeve and the outer-layer glass sleeve or a gap between the inner-layer glass sleeve and the outer-layer glass sleeve is vacuumized. The selective penetration layer is designed on the outer surface of the inner-layer glass sleeve and has the characteristics of high transmissivity and low emissivity; the radiation heat loss between the inner-layer glass sleeve and the outer-layer glass sleeve can be effectively reduced. The solar heat collection pipe provided by the invention has the characteristics of high heat collection efficiency, small heat loss, convenience for modularized installation and the like, can applied to devices including a non-focusing type heat collector or a linear focusing type heat collector and the like, and provides technical supports for further large-scale popularization and application of a solar heat collector.

Description

technical field [0001] The invention relates to the technical field of solar heat collection, including a heat absorber structure, a heat collector structure, end connections and the like, in particular to a solar heat collection tube with a built-in heat absorber. Background technique [0002] According to the temperature of solar collectors, solar collectors can be divided into low-temperature solar collectors, whose working temperature is below 80°C; medium-temperature solar collectors, whose working temperature range is 80-250°C; high-temperature solar collectors, whose working temperature is between Above 250°C. Solar low temperature collectors can be used in hot water, heating and other fields; solar medium and high temperature collectors can be used in heating, cooling, power generation and other fields. [0003] As the core component of the solar collector, the performance of the heat collecting tube directly affects the thermal performance of the entire collector. ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention provides a new type of solar heat collecting tube with a built-in heat absorber, which solves the short water flow channel of the traditional solar heat collecting tube in the prior art, the low turbulent flow intensity of the working medium, and the gap between the heat absorber and the heat absorber. The problem of small heat transfer area and large heat loss can be applied to low, medium and high temperature solar collectors

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