Research on energy saving of data center room envelope in different climate zones

This article improves the design method of heat transfer coefficient of peripheral envelope of data center rooms, and uses EnergyPlus software to establish calculation models for data center rooms in typical cities of five climate zones in China. Taking the annual air conditioning load and energy consumption as evaluating indicators, various peripheral envelopes with different heat transfer coefficients are simulated and economically analyzed. The results indicate that reducing the heat transfer coefficient of peripheral envelope of data center rooms is not significant to reduce the air conditioning energy consumption and operating cost. It is recommended that the maximum heat transfer coefficient of the internal surface anti-condensation should be adopted in the peripheral envelope of data center rooms in each climate zone. Furthermore, it can be found that the air conditioning system with free-cooling mode has significant energy saving potential in severe cold and cold zones.