设施农业中水蒸气的回收利用研究(Ⅱ)——回收量与环境要素的关系

STUDY ON THE RECYCLE AND APPLICATION OF VAPOR IN FACILITY AGRICULTURE (Ⅱ): THE RELATIONSHIP BETWEEN RECYCLED AMOUNT AND ENVIRONMENTAL ELEMENT

地气热交换水蒸气回收系统的回收量与温室内的环境要素———地气温度差、相对湿度、通风状况有关 .实验结果表明 :地气温度差越大 (>0 ) ,水蒸气回收量就越多 ,地气温度差等于 0℃或小于 0℃时 ,水蒸气回收量为零 ;回收量越多 ,相对湿度的降低幅度就越大 ,相对湿度越高 ,温室内的水蒸气量就越多 ;在温室内保持一定的空气流通性 ,会增加水蒸气回收量 .

The recycled amount from the recycled system of heat exchange between soil and air is relative to some environmental elements in the greenhouse, such as the temperature disparity between soil and air, relative humidity, and the air circulation constant. On the basis of the results obtained from the experiment, some conclusions are able to be derived as follows: The greater the temperature disparity(>0) between soil and air in the greenhouse, the bigger the amount of recycled vapor, and the recycled amount of vapor is zero when this temperature disparity equals or is under zero;The recycled amount increases in accordance with more dropped range of relative humidity, and the amount of vapor in the greenhouse increases as the relative humidity increases; the recycled amount of vapor will increase while keeping the air circulation constant.