MHPCC Data Center Energy Efficiency Measures Impact of Higher Air Intake Temperatures Prepared by: Rod Mahdavi, PE LEED AP Slide 1
Federal Data centers Case studies MHPCC Data Center UPS room Pumps 5,000 sf cooling, 1% Generator 500 kW IT BH Chillers 3% 8GWh 26% IT Equipment 53% Tropical climate Air-cooled Chillers CRAHs CRAH Fans/Heater 8% UPS+PDU Lighting Losses 1% 8% Slide 2
Case studies Seal all floor leaks and those between and within the racks Slide 3
Case studies Replaced Perf tiles Redirect cold air from the CRAHs Slide 4
Case studies Ceiling space as a plenum Slide 5
Case studies Before trials begin After RAT increased from 74degF to 84degF Slide 6
Case studies Individual racks intake top temperature change during trials (60-72) Average rack exhaust temperature change during trials (75-87) Slide 7
Case studies CRAHs Supply Avg. Temperatures 53 to 62 CRAHs Return Avg. Temperatures 64 to 83 Slide 8
Case studies Chillers Efficiency Improvement 260 58 56 240 54 220 52 200 50 Chiller plant kW 180 48 CHWST 160 46 140 44 120 42 100 40 1 2 3 4 45 49 54 56 CHWST sp degF 46 49 55.1 56.8 CHWST degF 75 75 0 0 CH1 kW 75 75 100 75 CH2 kW 75 50 75 75 CH3 kW Slide 9
Case studies Saved annually: 800MWh $240,000 utility cost 780 metric tons of GHG emission Slide 10
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