与建筑一体化对太阳能集热器热性能的影响

Effect of integration of solar heat collector with building on thermal performances of collector

针对与建筑一体化太阳能空气集热器上下表面处于不同环境温度的问题,利用动态热平衡法,建立该型集热器传热过程的数学模型,并通过实验进行了验证.运用数值实验法研究了该型集热器的热性能特征、建筑一体化对其热性能的影响规律,以及按非一体化模型计算时引入的误差.研究结果表明:该型集热器具有双热损系数的特征,与建筑一体化提高了其冬季供暖期的热效率,按分体式计算的误差与集热器背板总传热系数和室内外温差成正比、与太阳辐照度成反比.

Aimed at the problem that the upper and lower surfaces of a air collector of solar energy which is integrated with a building will have different ambient temperatures, the mathematical model is built for this type of collector on the basis of dynamic heat balance methods and its justification is conducted with experiment. The thermal performance characteristics of this type of collector pattern of the influence of its integration with building on its thermal performance, and the errors induced by the computation with non- integration model are investigated through numerical experiment. It is obtained from the investigation that there is a feature of double heat loss coefficients in this type of Collector, the thermal efficiency of the col- lector in winter heating period will be increased with such integration, and the foregoing errors are directly proportional to the total heat transfer coefficient of backplane and the indoor and outdoor temperature difference and inversely proportional to the intensity of solar irradiance.