The large and non-uniform heat load in data centers calls for the rationality of internal airflow distribution by the air conditioning system in case of server overtemperature.Aiming at a data center of Zhejiang State Grid,the airflow distribution and the temperature distribution in the data center are simulated and analyzed under different working conditions with the method of Computational Fluid Dynamics(CFD).The results have been compared with ASHRAE 2011 standard.With a setting velocity of 5 m/s and a setting temperature of 18℃at outlets of air conditioners,the intake temperature of air is higher than 32℃in 55.3%of the cabinets when the servers run at full load.The airflow distribution is uneven.The maximum airflow velocity at the air intakes of cabinets is five times of the minimum velocity.An optimization scheme of the cooling capacity redistribution is proposed with additional floor fans,which solves the problem of uneven cooling capacity distribution in the data center.The maximum temperature of the cabinets is under the limitation during full-load operation.The operation safety of the data center is satisfied.
data centerair distributionComputational Fluid Dynamics(CFD)airflow fieldtemperature field
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