通过循环空气在冷冻室温度下冷却潮湿空气。冷却系统根据空气中使用的湿度程序进行计算。调节水平。在计算过程中，发现盘管表面温度较低，这是霜冻区湿度测量特有的现象。线圈性能图表和表格是根据避开下限的计算结果编制的。引用:研讨会，ASHRAE Trans。，第95卷，第。2.

The cooling of moist air at freezer temperatures by means of recirculatory air.cooling systems is calculated in accordance with a psychrometric procedure used at air.conditioning levels. A low lim# on coil surface temperature, peculiar to psychrometrics in the frost zone, is recognized in the calculating procedure. Coil performance graphs and tabulations are prepared from calculations which avoid the low limit.