摘要
提出遮阳百叶散射-散射积分模型,通过积分求出百叶对天空散射、地面散射的综合透过率。结合射线追踪法,分别求得透过双层皮玻璃幕墙(DSF)系统的天空散射辐射和地面散射辐射。改变天气条件、百叶倾角等因素,对DSF系统的散射-散射辐射透过率进行模拟与实验对比,并求得室内散射-散射辐射得热量。结果表明:1)积分模型的散射-散射透过率逐时模拟结果与实验结果吻合较好,其准确性高于近似模型。2)散射-散射辐射得热量是室内太阳辐射总得热量的主要部分。百叶倾角分别为0°、30°、45°和60°时,积分模型计算室内散射-散射得热量与实验值之间的偏差均低于11%,而近似模型计算结果的偏差均约保持在30%。遮阳百叶散射-散射积分模型能准确模拟遮阳百叶的散射辐射。
A diffuse-diffuse integral model for shade blinds was proposed. The integrated transmittance of sky diffuse and ground diffuse of blinds was calculated through integral. Combined with the ray tracing method, the radiation of sky diffuse and the radiation of ground diffuse that passed through double skin facade （DSF）were worked out. By changing the tilt angle of blinds and the weather condition, the radiation transmittance of diffuse-to-diffuse of DSF system was simulated and compared with experiment, and obtained indoor diffuse-to-diffuse radiation heat gain. The results show that （1）. The results of diffuse-to-diffuse transmittance simulated by the integral model are in good agreement with the experimental result, and the integral model is far better than the accuracy of approximate model. （2）. diffuse-to-diffuse radiation heat gain is the main part of the total heat gain of indoor solar radiation. When the tilt angle of blinds is at 0°, 30°, 45° and 60°, respectively, the deviations between the obtained indoor diffuse-to-diffuse radiation heat calculated by integral model and the experimental values is less than 11%, and the deviation with the results calculated by the approximate model is about 30%. The proposed diffuse-diffuse integral model for shade blinds has very high accuracy in simulating the diffuse radiation of shade blinds.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2017年第10期2770-2777,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51378185)
