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本文概述了辐射致冷的机理,讨论了由不同的透明“风屏”及辐射体组成的几种可能的冷却系统,分析了致冷系统中辐射体与天空之间辐射换热的计算方法。为比较辐射体的光谱选择性特性对致冷效果的影响,文中对以理想辐射体、铝化的聚氟乙烯表面及以TiO_2为基的白漆为辐射体的三种辐射致冷系统作了实例计算。计算结果表明,三种系统都具有明显的致冷效果,以理想辐射体的冷却能力最强。本文对今后拟开展研究的课题提出了几点建议。
This article summarizes the mechanism of radiation cooling, discusses several possible cooling systems made up of different transparent “wind screens” and radiators, and analyzes the calculation methods for radiation heat transfer between radiators and the sky in a refrigeration system. In order to compare the effect of the spectral selectivity of the radiator on the cooling effect, three radiation cooling systems using ideal radiators, an aluminized polyvinyl fluoride surface, and a TiO 2 -based white paint radiator as the radiators were made. Example calculations. The calculation results show that all three systems have obvious cooling effect, and the ideal radiator has the strongest cooling ability. This article puts forward several suggestions for the topics to be studied in the future.