温室跨度对日光温室光照环境的影响模拟研究

Simulation Study of Influence on Greenhouse Span on Greenhouse Light Environment

借助中国农业大学首次研发的日光温室光环境模拟预测软件,模拟研究了一定跨度(6m)和不同跨度(6、8、10m)下,指定时刻温室内各点的光照度分布,以及不同跨度、指定时间段,温室内各表面的累积光辐射能量的分布规律及温室的透光率。结果表明:随着温室跨度的增加,温室地面和墙面的累积光辐射能量是增加的,而两者的光照度却呈下降的趋势;考虑到温室内作物吸收能量的效率与种植规模的因素,温室跨度以8m为宜。温室的平均透光率在温室跨度为8m时达到最大值63.6%。这一结论,与日光温室实际建造的普遍做法相符。

This paper studies law of light distribution and cumulative radiation energy on different greenhouse span （6m, 8m,10m） by China Agriculture University Greenhouse Light Environment Simulation Software .The results show that with the increase in Greenhouse span ,optical radiation accumulation of greenhouse floor and wall is increased , however ,the light intensity both are in a downward trend .Considered the efficiency of energy absorption of crops in greenhouse and planting scale factors , 8 meters of greenhouse span is appropriate .The average transmission rate reached the maximum value 63.6%when the greenhouse span is 8m.This conclusion accords with a common practice on sunlight greenhouse built .