MU-PAOX03
过于潮湿的空气会导致冷凝和身体不适等问题。除湿方法通过冷却盘管或吸附装置循环潮湿空气。只有在冷却季节才需要除湿。在这些应用中，冷却系统可以设计为提供除湿和冷却。对于除湿，冷却盘管的容量和表面温度必须足以将空气冷却到露点以下。冷却空气使水凝结，然后收集并排出。当湿度达到临界值且冷却系统用于除湿时，可重新加热除湿空气，以保持所需的空间温度。当冷却盘管不能充分降低含水量时，应安装吸附装置。吸附装置使用硅胶、活性氧化铝或吸湿盐的旋转颗粒床（图12），或氯化锂盐水或乙二醇溶液的喷雾。在这两种类型中，吸附剂材料从空气中吸收水分，然后饱和吸附剂材料通过装置的单独部分，该部分加热以去除水分。吸附剂材料将水分释放到“清道夫”气流中，然后将其排出。扫气空气通常是排气，也可能是室外空气。

Air that is too humid can cause problems such as condensation and physical discomfort. Dehumidification methods circulate moist air through cooling coils or sorption units. Dehumidification is required only during the cooling season. In those applications, the cooling system can be designed to provide dehumidification as well as cooling. For dehumidification, a cooling coil must have a capacity and surface temperature sufficient to cool the air below its dew point. Cooling the air condenses water, which is then collected and drained away. When humidity is critical and the cooling system is used for dehumidification, the dehumidified air may be reheated to maintain the desired space temperature. When cooling coils cannot reduce moisture content sufficiently, sorption units are installed. A sorption unit uses either a rotating granular bed of silica gel, activated alumina or hygroscopic salts (Fig. 12), or a spray of lithium chloride brine or glycol solution. In both types, the sorbent material absorbs moisture from the air and then the saturated sorbent material passes through a separate section of the unit that applies heat to remove moisture. The sorbent material gives up moisture to a stream of “scavenger” air, which is then exhausted. Scavenger air is often exhaust air or could be outdoor air.