上排风方式在华北型连栋温室夏季降温中的试验研究

Preliminary experimental study of up ventilation cooling method in a multi-span huabei-type greenhouse

针对华北型连栋温室夏季降温系统存在的内遮阳网上部高温区通风不足的问题 ,提出了一种新的通风降温模式 :上排风 +湿垫 +内遮阳网。对该模式的夏季降温效果进行了试验研究 ,结果表明 ,在外部平均温度为 2 9 8℃时 ,通过上排风方式可以降低温室内部温度 3 4℃ ;上排风方式与下部纵向通风方式相比 ,节能率达到 9 6 %。该降温模式对温室的夏季降温有一定的效果。

An approach (Up ventilation+wet pad+inside thermal net-cooling system) was introduced to decrease heat air coming from sunshine in the greenhouse. A new model for ventilation in Huabei type greenhouse in summer was put forward. The effects of that model were studied in different matches. Results indicated that this system was efficiency. When the air temperature outside greenhouse is 29.8*!℃,up ventilation cooling method could reduce inside temperature of the greenhouse in summer, up to 3.4*!℃. Compared with mechanical ventilation method, its energy saving ratio can be increased to 9.6%.