日光温室太阳总辐射量变化规律及利用分析

Analysis on Solar Radiation's Changing Laws and Utilization in Solar Greenhouse

研究温室内太阳总辐射量、太阳辐射利用效率的变化规律,太阳总辐射和净辐射的关系以及新旧薄膜对其关系的影响,为日光温室环境控制提供理论依据。实时测定温室内太阳辐射量,与温室外太阳辐射进行比较分析,且对不同薄膜覆盖下的太阳辐射环境进行对比。结果表明,9月-翌年4月,温室内月平均太阳总辐射量先减少后增加,12月只有4.45MJ/m2,4月为11.68MJ/m2;11月温室日总辐射利用效率最好,Q内/Q外值为75.99%,且Q外-Q内仅1.67MJ/m2。温室太阳总辐射与净辐射呈现较好的线性关系,3、4月份的线性方程表示为y=0.8277x-0.2909,相关系数R=0.995。旧膜A与新膜B相比,膜A的太阳辐射利用效率小于膜B,最多达13%,且使用膜A时,3、4月份总辐射与净辐射线性方程表示为y=0.9223x-0.1762,相关系数R=0.985。日光温室内太阳辐射环境变化规律及设施对其影响的研究是温室环境调控的基础。

The changing laws of solar radiation, utilization efficiency of solar radiation and the correlation between solar radiation and net radiation, as well as the influence of film on the utilization efficiency and correlation were studied. It was to provide theoretical foundation for optimizing structure and controlling environment of solar greenhouse. Solar radiation inside was timely measured, and analyzed by comparing with solar radiation outside. Radiation environment under different films was contrasted. The results showed that： from September to next April, the mean monthly solar radiation inside decreased early, and increased late, December was 4.45 MJ/m2, April was 11.68 MJ/m2. In November, the utilization efficiency of solar radiation was the best, the value of Q, JQo,, was 75.99%, and the Qout-Qin was only 1.67 MJ/m2. There was a fine linear correlation between solar radiation and net radiation, the equation in March and April was y=0.8277x-0.2909, and R was 0.995. Comparing with the new film （film B）, the utilization efficiency of the old film （film A） was less than film B up to 13%, and the equation in March and April was y=0.9223x-0.1762, R was 0.985. The research on solar radiation＇ s changing laws in solar greenhouse, and the facility＇ s influence was the basic of environment control.