空气热交换系统在温室环境控制中的应用

Application of Air Heat Exchange System in the Greenhouse Environment Control

直接通风将温室中积聚的热量(冷量)排到室外,处理进入的新风总热负荷损失巨大。温室系统中安装热交换系统通过能量回收芯体良好的热传递和交换特性,在双向置换通风的过程中截留温室排风中低品位的能量并加以循环利用,可以很好地解决冬季温室通风和温度保护的矛盾,减少棚室由于环境密闭造成的植物病害,提高温室系统控制水平,从而达到降低温室系统能耗和节能减排的目的。实验数据表明冬季配有热交换系统的温室可以延缓太阳辐射减少后的温度衰减速度,夜间保温效果好,温室的日平均温度提高1.5℃。

Direct ventilation discharging accumulated heat and cooling capacity out of greenhouse and processing the entering fresh air from outside loses enormous energy. With the good heat transfer and exchange properties, the heat recovery system can retain and recycle the low grade energy from greenhouse exhaust air in the process of bidirectional displacement ventilation, which can provide a good solution to the contradiction between holding temperature and greenhouse ventilation in winter, decrease the plant diseases resulted from closed environment and improve the system control level of the greenhouse, and achieve the goal of lower greenhouse system energy consumption and energy saving. The experiment indicated the heat recovery system applied in greenhouse in winter can delay the temperature＇s weakening speed after solar radiation, and hold the heat overnight and increase the daily average temperature by 1.5 ℃.