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Reducing Information Technologies ever-increasing carbon footprint

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A carbon neutral strategy for data centers plus, the extreme energy efficiencies designed into the CIX.ie data centre.

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Reducing Information Technologies ever-increasing carbon footprint

  1. 1. reducing information Technology's ever- increasing carbon footprint Tom Raftery Blog: cix.ie / tomrafteryit.net Podcast: www.podleaders.com Email: tom@tomrafteryit.net
  2. 2. CIX • Cork Internet eXchange - CIX • First professional data centre outside Dublin • Opening Oct ’07 • Not a sales pitch (unless your based in Cork!!!)
  3. 3. CIX.ie
  4. 4. CIX.ie
  5. 5. CIX.ie
  6. 6. CIX.ie
  7. 7. CIX.ie
  8. 8. Lingo • Watts = Voltage x Amps • 1000 Watts for 1 hour = 1kWh • 1U = 1 rack unit = 44.45 mm (1.75 in) high • 1U servers -> 1A = 220W or .22kW • Blade Servers/SAN = 500W per 1 U • A large server might take 1kW • 40U rack could use 20kW of power
  9. 9. CIX Vision • Carbon neutral data centre • Why? • How?
  10. 10. Why? Climate change
  11. 11. Why? • DC running costs • Staffing - reasonable controllable • Connectivity - decreasing • Energy - increasing
  12. 12. Increasing Energy requirements • Rack of equipment typically used • 1.5 kW 7 years ago • 4.5 kW 4 years ago and • 15 kW in 2006! • SL Avatar consumes 1.75 kWh p.a.!
  13. 13. Watts per $1000 server spend • Price to fill a rack has gone down • Power consumption has gone up • => Increasing Watts per $1000 of server spend
  14. 14. Watts per $1000
  15. 15. Carbon Neutrality • How? • Using Pure Plant Oil (PPO) as an energy source
  16. 16. Background • Data Centres: • Consume a lot of electricity • At roughly a constant rate • Have generating capacity at 2x requirements • Connected to grid through high voltage substations
  17. 17. Background • Electricity Supply: • Cannot be stored • Seasonal & diurnal demands • ESB offers Max Demand (MD) discounts • Wind generates 0-30% of demand but is highly unstable
  18. 18. The Strategy • Create a Data Centre power grid • Powered by diesel generators burning PPO • Grid generates power for ESB by day and pulls surplus power from ESB by night • Give control of grid to ESB • ESB can now buy more wind power
  19. 19. Requirements • Political will • Buy in from ESB • Buy in from other DCs • Buy in from farmers! • Time!
  20. 20. In the meantime • CIX are innovating to maximise • Energy efficiency and • Minimise carbon footprint
  21. 21. Optimal DC environment
  22. 22. DC Energy Flow
  23. 23. Innovations • Utilise free cooling • Dynamically maximise chilled water temperature • Eliminate water mixing • Minimise humidification • Eliminate air mixing • Utilise low resistance, slow speed air paths
  24. 24. Free Cooling • Mean temp in Cork is 10.5˚C • Optimum inlet temp for servers is 21˚C • Exhaust air from servers is 30˚C to 40˚C • Use ambient temp to cool the warm air and return water
  25. 25. Maximise Chilled Water Temp • Chillers have a fixed set point • CIX developed dynamic chiller control system • Maximises temp of chilled water • Reduces energy required to chill it
  26. 26. Eliminate Water Mixing • Fixed chiller set-point • If CRAHs get overly cold water • => mix with warm water - extremely wasteful • Dynamic set point eliminates water mixing
  27. 27. Minimise Humidification • Low temperature water CRAHs => condensation • reduces the relative humidity • Steam (energy and cooling implications) required to humidify • Dynamic chiller set point => less condensation
  28. 28. Typical DC
  29. 29. Eliminate Air mixing • Mixing hot and cold air - v wasteful • Most DCs - hot aisle/cold aisle separation • CIX - cold aisle containment - most energy efficient rack layout
  30. 30. Low Resistance, Slow Speed Air • Large unobstructed under-floor cavities • Large overhead spaces for return air flows • Fans require less energy to move air • Also, using thyristor controlled direct drive fans to reduce belt resistance losses
  31. 31. Server Supplied Heating • Dimplex heat exchange unit • Servers heat the CIX offices • Servers heat water for CIX
  32. 32. Power • 10kv low impedence looped connection to the national grid • Using GE Super ECO UPS’s offering >98% efficiency
  33. 33. Power Normal mode Bypass Static bypass supply •Normal mode • The output voltage is newly generated, Rectifier Inverter independently from the input voltage AC Load DC Rectifie Heat losses are present in rectifier and • r AC DC inverter supply Battery bank •Super Eco Mode • Load is supplied via the bypass Super Eco Mode • UPS rectifier keeps the battery charged Bypass • UPS inverter switched o Static bypass supply (no heat losses) Rectifier Inverter Transf. AC Load DC Rectifie r AC DC supply Battery bank
  34. 34. Typical DC
  35. 35. End Result Standard DC CIX 33% 12% Chiller 3% 1% Humidifier 9% 4% CRAC 30% 80% IT Equipment 5% 0.01% PDU 18% 2% UPS 1% 1% Lighting 1% 1% Switch Gear
  36. 36. Conclusion • Carbon neutrality • many stakeholders • Political will • time to roll out • Extreme energy efficiency • Being built-in!
  37. 37. 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 • Second Life Avatar Power consumption - www.roughtype.com/archives/2006/12/ avatars_consume.php
  38. 38. Thanks Tom Raftery Blog: www.tomrafteryit.net Podcast: www.podleaders.com Email: tom@tomrafteryit.net

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