Influence of different air-conditioning terminals on performance of maglev centrifugal compressor and lipuid pump driven composite cooling system
A prototype of maglev centrifugal compressor and liquid pump driven com-posite 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 ter-minals,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 differ-ent 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.
data centermaglev compressorliquid pumpheat pipecomposite air-con-ditioningannual energy efficiency ratio(AEER)power usage effectiveness(PUE)
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