The power usage limit becomes lower with the green development of data centers.The small liquid cooling device is emerging as a new cooling option for small data centers with high energy density,which helps recover the waste heat.In this paper,the energy efficiency characteristics of three types of water-source heat pump systems under different surplus heat conditions are compared and analyzed in the surplus heat load range of small data centers.The energy efficiency of the water-source heat pump system is distributed at 5-7,5-6,and 4.5-6.5 on the source side,transmission and distribution side,and user side,respectively.When the user-side heat load is retained at 0 kW to 1 750 kW and 2 500 kW to 3 200 kW,the energy efficiency of the source-side enhanced water-source heat pump system is highest.When the user-side heating load demand is 1 750 kW to 25 00 kW,the energy efficiency of the source-side enhanced water-source heat pump system is near that of the transmission and distribution-side enhanced water-source heat pump system.Finally,the coupling matching formula QN=kQs is obtained between the user-side heat load demand and data center surplus heat load,in which k ranges from 1.196 2 to 1.364 2.
关键词
数据中心/余热利用/水源热泵/能效/耦合关系
Key words
data center/waste heat utilization/water-source heat pump/energy efficiency/coupling formula
维普
万方数据