数据中心间接蒸发冷却空调全年运行效果分析与调节策略

Annual Operation Effect Analysis and Adjustment Strategy of Indirect Evaporative Cooling Air Conditioner in Data Center

为全面分析与准确评价数据中心间接蒸发冷却空调全年运行效果,通过焓湿图及空气处理过程进行剖析,提出分别用湿工况效率与干工况效率评价指标刻画间接蒸发冷却空调在数据中心的运行性能。发现间接蒸发冷却空调运行参数与能效参数主要随二次空气和环境空气变化而变化,一次空气机房回风相对湿度每增加10%,回风焓值增加9.4kJ/kg。并且,数据中心间接蒸发蒸发冷却空调全年运行调节过程中,干模式与湿模式切换推荐值分别是干球温度14℃,湿球温度19℃,可控制湿通道淋水量、二次风量、干湿模式切换点来调节系统全年运行能效。

In order to comprehensively analyze and accurately evaluate the operating effect of indirect evaporative cooling air conditioners in data centers throughout the year,this paper analyzes the enthalpy humidity chart and the air treatment process,and puts forward evaluation indexes of efficiency in wet and dry conditions to describe the operating performance of indirect evaporative cooling air conditioners in data centers.It is found that the operating parameters and energy efficiency parameters of the indirect evaporative cooling air conditioner mainly change with the change of secondary air and ambient air.When the relative humidity of the return air in the primary air room increases by 10%,the return air enthalpy increases by 9.4kJ/kg.In addition,during the annual operation and adjustment process of indirect evaporative cooling air conditioners in data centers,the recommended switching values of dry mode and wet mode are respectively 14℃ for dry bulb temperature and 19℃ for wet bulb temperature,which can regulate the annual energy efficiency of the system by controlling the water volume of wet channel,secondary air volume and the switching point of dry and wet modes.