蒸发冷凝式间接蒸发冷却空调机组的设计与测试

Design and test of evaporative condensation indirect evaporative cooling air conditioning unit

为了解决数据中心制冷系统空调能耗大的问题,设计1款将蒸发冷却、蒸发冷凝和机械制冷3种技术相结合的新型数据中心用蒸发冷凝式间接蒸发冷却空调机组。通过焓差实验室模拟不同二/一次风量比和不同干湿的工况条件,并对机组进行性能测试。得出该机组最佳二/一次风量比区间为2.2~2.4,间接蒸发冷却段效率在干燥地区、中湿度地区、高湿度地区分别为72%、61%、53.45%,机组送风温度在24℃左右可以满足数据中心机房的送风要求。并对机组在兰州、北京、上海3个不同气候区样本城市进行适用性分析,得出该机组在3座城市利用自然冷源供冷时间占全年运行总小时数分别为98%、78%、62%,适用性良好。

In order to solve the problem of high energy consumption of air conditioning system in data center,a new type of indirect evaporative cooling air conditioning unit was designed,which combines evaporative cooling,evaporative condensation and mechanical refrigeration.Through the enthalpy difference laboratory,the performance of the prototype was tested by simulating different secondary and primary air volume ratios and different dry and wet working conditions.The results show that the optimal air volume ratio range of the unit is 2.2~2.4,the efficiency of the indirect evaporative cooling section is 72%,61%and 53.45%in dry region,medium humidity region and high humidity region respectively,and the air supply temperature of the unit is about 24℃,which meets the air supply requirements of the data center room.The applicability analysis of the unit in three typical cities of lanzhou,Beijing and Shanghai in different climate zones shows that the cooling time of the unit in the three cities using natural cooling source accounts for 98%,78%and 62%of the total operating hours of the year respectively,showing good applicability.