非对称连跨式节能温室的温度性能分析

分析了非对称连跨式节能温室内温度的空间分布及季节性的变化趋势。从南北向上看,夜晚温差为1~2℃,白天高温区在北墙和距北墙6 m、12~14 m处,低温区在距北墙8~10 m处;从东西向上看,夜晚温差为2~3℃,白天高温区在距东部40~50 m处,而阴天变化较小;从垂直差异上看,夜晚温度极差平均为0.2℃,白天温度极差随着高度的增加而增大。非对称连跨式节能温室夏季比露地延长60 d,冬季比露地缩短60 d,可实现长季节栽培。

Analysis of Temperature Performance in Unsymmetrical Multi-span Energy-saving Greenhouse

In this paper the space distribution of temperature and the seasonal change in unsymmetrical multi-span greenhouse were analyzed.In the north-south direction,the temperature variety at night was 1～2 ℃ in winter;the higher temperature was observed on the north wall and 6 m,12～14 m from the north wall in the daytime;the lower temperature zone was at the 8～10 m from the north wall.In the west-east direction,the temperature variety at night was 2～3 ℃ in winter;the higher temperature zone was observed at the 40～50 m from the east in the sunny day but the temperature variety was slight in the cloudy day.In vertical direction,the night temperature difference was only 0.2 ℃ on average,while the temperature variety was influenced by the radiation in the daytime,the temperature rising with the increase of the height from the ground.In a word,the unsymmetrical multi-span energy-saving greenhouse could make the greenhouse climate prolong about 60 days in summer and shorten about 60 days in winter,thus over-the-year cultivation can be realized.