日光温室气象环境综合研究(三)——几种弧型采光屋面温室内直射光量的比较研究

A Comprehensive Research on the Meteorological Environment in Sun-light Greenhouse (Ⅲ)——A Comparative Research on the Total Amount of Direct Radiation in the Greenhouse with Different Arc Lighting Surfaces

摘要: 本文计算了北京地区四种弧型采光屋面的温室内10～4月各月平均太阳直接辐射日总量(简称直射光总量),并进行了比较。结果表明10～4月室内直射光总量均以圆面——抛物面组合型温室最高,椭圆面最低。圆面和抛物面相比,冬季(11～2月)前者优于后者,春季(3～4月)相反。

Abstract: In this paper, we calculated and compared the mean daily amount of direct solar radiation of each month from October to April in four types of greenhouse in Beijing region. Each type of these greenhouses has its specific arc lighting surface. The results showed that the total amount of direct radiation in composed type greenhouse with circular-parabolic was the most, and that in the type with elliptic surface was the least in the period from October to April. In winter (November-February) ,the greenhouse with circular surfaces was better than that with parabolic surface. But in spring (March-April) ,the result was contray to that in winter.