... as the average of the observations. (b) POD modes, ψ i , calculation. Using the observation and solving an eigenvalue problem ( 43 ), POD modes for the entire domain are calculated. 23 12 2009 24 02 2010 09 09 2010 air conditioning computer centres cooling power...

...Emad Samadiani; Jeffrey Rambo; Yogendra Joshi This paper is centered on quantifying the effect of computer room and computer room air conditioning (CRAC) unit modeling on the perforated tile flow distribution in a representative raised-floor data center. Also, this study quantifies the effect...

... considered, the chiller energy use was the biggest fraction of about 41% and was also the most inefficient. The room air conditioning was the second largest energy component and was also the second most inefficient. A sensitivity analysis of plant and chiller energy efficiencies with chiller set point...

... currently used for thermal management of data centers consists of computer room air conditioning (CRAC or AC) units that deliver cold air to the cabinets arranged in cold/hot aisles through perforated tiles placed over an under-floor plenum, see Fig. 1 . Several researches have simulated these typical...

... floor data center with 12 kW racks is considered. There are four rows of racks with alternating hot and cold aisle arrangement. Each row has six racks installed. Two air-conditioning units supply chilled air to the data center through the pressurized plenum. Effect of plenum depth, floor tile placement...

... power density data centers of the future. Current techniques control the computer room air conditioning units (CRACs) based on the return air temperature of the air—typically set near 20 ° C . Blowers within the CRACs are normally operated at maximum flow rate throughout the operation of the data center...