Energy efficiency assessment and influencing factors analysis on air-conditioning system for data centers
A year-round dynamic simulation is conducted on the energy efficiency of the air-conditioning system of a data center in Beijing.The influence of actual cooling load ratio and energy efficiency of the water chiller on the system energy efficiency is analy-zed.The results show that when utilizing water chiller A,the air-conditioning system ob-tains an annual average design energy efficiency ratio (EER)of 9.61 at 100％ load ratio,which is much lower than the EER achieved at 70％ load ratio.At 70％ load ratio,the use of water chiller B,which has the same cooling capacity but a different coefficient of per-formance (COP),results in an increase of 0.54 in the annual average design EER of the air-conditioning system,compared with using water chiller A.
data centerair-conditioning systemnatural coolingenergy efficiency
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