Building a Hyper Energy-Efficient
Data CenterTom Raftery
Blog: www.greenmonk.netEmail: [email protected]
Why? DC Energy requirements
• Rack of equipment typically used• 1.5 kW 8 years ago• 4.5 kW 5 years ago and• 15 kW in 2006!
Also
• Dimplex heat exchange unit• Servers heat the CIX offices!
• Low resistance, slow speed air paths
Power
• 10kv low impedence looped connection to the national grid
• Using GE Super ECO UPS’s offering >98% efficiency
Power
•Normal mode• The output voltage is newly generated,
independently from the input voltage• Heat losses are present in rectifier and inverter
•Super Eco Mode• Load is supplied via the bypass• UPS rectifier keeps the battery charged• UPS inverter switched off
(no heat losses)
Super Eco Mode
Normal mode
Inverter
DC
Battery bank
AC
ACDC
Static bypass
Rectifier
Bypass supply
LoadRectifier
supply
Inverter
DC
Battery bank
AC
ACDC
Static bypass
Rectifier
Bypass supply
LoadRectifier
supply
Transf.Good!
End Result
Standard DC CIXChiller
HumidifierCRAC
IT EquipmentPDUUPS
LightingSwitch Gear
33% 12%3% <1%9% 4%30% 80%5% 0.01%18% <2%1% <1%1% 1%
References
• Uptime Institute - www.upsite.com
• APC - www.apc.com
• GE - www.ge.com
• CIX Energy Efficiency White Paper - www.cix.ie/air-conditioning-efficiency-at-the-cix-data-centre