在制冷剂温度低于0℃的情况下运行的空气冷却盘管需要定期除霜以恢复冷却性能。除霜会在制冷系统上产生寄生负载，并可能导致制冷空间的短期温度波动。量化了除霜热负荷、制冷设施中的潜在负荷、除霜融水流量和除霜效率之间的关系。将除霜影响降至最低的实用建议包括:将设施上的潜热负荷降至最低，建立一种除霜终止方法，避免对空间进行非生产性加热，改变除霜频率以匹配设施所经历的潜热负荷，以及通过测量熔融水流量来监测除霜。 虽然按需除霜系统应将除霜的频率和持续时间调整到接近最佳状态，但它们并不总是可靠的，并且可以在不合适的时间安排除霜。定时（但偶尔手动调整）启动和温度终止通常为工业系统提供成本、效率和鲁棒性的最佳组合。引用:2019年冬季会议，佐治亚州亚特兰大，会议论文

Air cooling coils operating with a refrigerant temperature below 0oC require regular defrosting to restore cooling performance. Defrosting creates parasitic load on the refrigeration system and can result in short term temperature fluctuations in the refrigerated space. The relationships between defrost heat load, latent loads in the refrigerated facility, defrost melt water flows, and defrost efficiency are quantified. Practical suggestions to minimize the impact of defrost include: minimizing latent heat loads on the facility, establishing a defrost termination method that avoids unproductive heating to the space, varying the frequency of defrost to match the latent load the facility experiences, and monitoring defrost by measuring the melt water flow. While on-demand defrost systems should vary both the frequency and duration of defrost near optimally, they are not always reliable and can schedule defrost at inopportune times. Timed (but manually adjusted occasionally) initiation and temperature termination often provide the best combination of cost, effectiveness and robustness for industrial systems.