不同空调末端对磁悬浮离心式压缩机与液泵驱动复合冷却系统性能的影响

Influence of different air-conditioning terminals on performance of maglev centrifugal compressor and lipuid pump driven composite cooling system

设计一种制冷量为240~250kW的磁悬浮离心式压缩机与液泵驱动复合冷却系统样机,分别配置2组120kW房间级冷冻水末端、4组60kW列间级冷冻水末端以及2组120kW风墙制冷剂末端、12组20kW热管背板制冷剂末端,在焓差室进行试验研究,分析不同末端冷却系统在8个典型城市的应用效果。结果表明:对于冷冻水泵输配的复合冷却系统,采用房间级冷冻水末端时,8个典型城市平均AEER为6.5,PUE≤1.29;采用列间级冷冻水末端时,平均AEER为9.3,PUE≤1.24。对于液泵输配的复合冷却系统,采用风墙制冷剂末端时,平均AEER为11.8,PUE≤1.21;采用热管背板制冷剂末端时,平均AEER超过14.8,PUE≤1.18。相比房间级冷冻水末端,列间级冷冻水末端、风墙制冷剂末端、热管背板制冷剂末端的各个典型城市AEER平均增幅分别为42%,80%和127%,这表明制冷剂末端,特别是热管背板制冷剂系统,在应用时的能效更佳。磁悬浮离心式压缩机与液泵驱动复合冷却系统性能可以匹配不同形式的末端,在不同城市PUE的预计应用效果均低于1.29,可以为我国数据中心冷却系统的设计提供参考。

A prototype of maglev centrifugal compressor and liquid pump driven composite cooling system with a cooling capacity of 240-250 kW is designed.Two sets of 120 kW room-level chilled water terminals,four sets of 60 kW inter-row chilled water terminals,two sets of 120 kW wind wall refrigerant terminals and twelve sets of 20 kW heat pipe backboard refrigerant terminals are respectively equipped.The experimental study is carried out in the enthalpy difference laboratory to analyze the application effects of different terminal cooling systems in eight typical cities.The results show that for the composite cooling system of chilled water pump distribution,when the room-level chilled water terminals are used,the average AEER of eight typical cities is 6.5 and PUE is not higher than 1.29;when inter-row chilled water terminals are used,the average AEER is 9.3,and PUE is not higher than 1.24.For the composite cooling system of liquid pump distribution,when the wind wall refrigerant terminals are used,the average AEER is 11.8 and PUE is not higher than 1.21;when the heat pipe backboard refrigerant terminals are used,the average AEER is more than 14.8 and PUE is not higher than 1.18.Compared with the room-level chilled water terminal,the average increases of AEER using inter-row chilled water terminal,wind wall refrigerant terminal and heat pipe backboard refrigerant terminal in each typical city are 42%,80% and 127%,respectively,which indicates that the refrigerant terminal,especially the heat pipe backboard refrigerant system,has better energy efficiency in application.The performance of maglev centrifugal compressor and liquid pump driven composite cooling system can match different types of terminals,and the expected PUE applied to different cities is lower than 1.29,which can provide reference for the design of cooling system of data center in China.