日光温室内各表面太阳辐射照度的模拟计算

建立了温室内各表面太阳辐照度计算模型,并对沈阳地区跨度为12 m的日光温室进行模拟,分析了温室建筑参数改变对温室内各表面太阳辐射照度的影响。结果表明:冬季最冷月(2003 12至2004 02)温室内后坡单位面积太阳辐射照度分别为土壤表面及后墙面的1.45和1.49倍;温室地面太阳辐射照度模拟结果与实际测试结果差值不超过5%。改变温室跨度和高度分别对地面及北墙面太阳辐射照度有较大影响,且呈线性关系;改变温室后坡仰角对温室内各表面太阳辐射照度的影响不显著。

Simulation of solar radiation on surfaces of a solar greenhouse

A mathematical model for solar radiation on the surfaces of a solar greenhouse was proposed and the heat transfer of a solar greenhouse with 12?m span in Shenyang was simulated by above model.The simulated results showed that the solar radiations on the north roof surface in the coldest months(from December to February) were 1.45 and 1.49 times of that on the ground and north wall surfaces respectively and the values of solar radiation on the ground from the simulation and the experiments agreed well and the error between them was not more than 5%.The analytical results for influence of the building parameters on solar radiation to the surfaces of a solar greenhouse showed that the changes of span and height could obviously alter solar radiation intensity on the ground and north wall and their relationship indicated a linear one;while the alteration of north roof angle had a little influence on solar radiation intensity inside the greenhouse.