一种新型温室的冬夏季室内温度场数值模拟研究

Indoor temperature field numerical simulation of a novel greenhouse in winter and summer

以计算流体力学（CFD）为理论依据,以某市的气象因子为输入条件,对比研究了一种新型温室与单栋塑料大棚、传统日光温室的冬季保温性能和夏季通风降温效果,以期为该新型温室的应用提供理论依据。该新型温室后墙由可拆卸的秸秆板组成。冬季,后坡与后墙覆盖秸秆板以维持室内温度;夏季,拆除秸秆板以增加温室通风面积。研究结果显示：冬季,新型温室与传统日光温室的白天室内温差为0-0.9℃,夜间温差为0-0.7℃;新型温室全天室内温度高于塑料大棚0-5℃。夏季,在通风口关闭时,新型温室的室内温度、地面温度与塑料大棚差异不明显,当通风口开启时,新型温室的室内高温区域较小。

This study compared the effect of heat preservation in winter and ventilation and cooling in summer of a novel greenhouse, traditional solar-greenhouse and plastic greenhouse based on the theory of computational fluid dynamics（CFD）. The new type of green- house has the same structure as traditional solar-greenhouse. But its north wall and north roof are covered by straw board. In winter,the straw board can play the important role of thermal insulation in order to improve the temperature of indoor at night. While in summer, the straw board was removed for ventilation and cooling. The result shows that in winter,the temperature difference between new green- house and traditional solar-greenhouse is from 0 ℃ to 0.9 ℃ in daytime and 0 ℃ to 0.7 ℃ at night. The temperature of the new green- house is 0-5℃ higher than that of plastic greenhouse＇s. In summer,there are no obvious differences between both in indoor temperatures and ground temperatures of the new type greenhouse and plastic greenhouse when the vents are closed. But when the vents are opened,the new type greenhouse is superior to plastic greenhouse in interior temperature distribution.