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Cooling datacentres and a other stuff. Ole Kjærgaard Technical Director, Mail: First some facts. UNI•C - Danish IT Centre for Education and Research

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cooling datacentres and a other stuff

Cooling datacentres and a other stuff

Ole Kjærgaard

Technical Director,


first some facts
First some facts

UNI•C - Danish IT Centre for Education and Research

  • UNI•C is an agency under the Danish Ministry of Education. UNI•C delivers a variety of IT services to the educational and research communities. More than one million users regularly benefit from UNI•C’s services and products.
  • UNI•C has more than 300 employees, and offices in Copenhagen, Lyngby and Aarhus.
our green approach
Our green approach
  • The datacentre (approx. 1.500 sqm.)
  • Finding power consuming devices
  • Awareness campaigns
  • Intelligent houses
the datacentre
The datacentre
  • Optimizing air-flow
    • Cold and hot aisles
    • Placing down-flow units
  • Optimizing cooling machines
    • Free cooling
    • Controlling the cooling machines
  • Use IT equipment with low power consumption
  • Remember to turn off old equipment
  • Virtualize
  • Know your power consumption
cooling machines
Cooling machines
  • Free cooling
  • Intelligent control

Increase water temp.

cooling in the datacentre
Cooling in the datacentre

Increase air temp.

Placing down-flow units

power usage effectiveness pue
Power Usage Effectiveness - PUE
  • PUE is the total power consumption in the datacentre (incl. UPS, cooling etc.) divided by the consumption from the IT equipment. A typical value in older datacentres is a PUE-value between 2,0 and 2,5. PUE=2 means that for each Watt spend on the IT equipment, another Watt is used in UPS, cooling etc.
what is your power consumption
What is your power consumption?
  • The IT guys do typically not know the power consumption in the data centre
  • The power bill is normally paid by the ones responsible for rent, cleaning etc.
  • But this is not the case at UNI•C…
  • Which machine has the highest stand-by consumption?
  • Printers
    • Xerox multifunction (daytime) 93 W
    • HP Color 4700 17 W
    • HP Color 3700 14 W
    • HP S/H 2200 11 W
  • Mailing/postage machine 7 W
  • Fax 37 W
awareness campaigns
Awareness campaigns
  • Buy some (good) energy meters
    • Distribute them!
my office pc
My office PC
  • Guess the power consumption?
the answer is
The answer is…
  • 140 W
  • Remember to turn the PC off at the end of each working day
  • Do not use screensavers with pcitures on the screen (NO flying windows…)
  • Use remote desktop/terminal servers for home/remote work
intelligent houses
Intelligent houses
  • Connecting light and access control/alarm
  • Use standby functions (Coffee makers, printers etc)
  • Simple things (on/off timers)
  • Motion detectors
  • Light sensors
general considerations
General considerations
  • Think CO2 instead of energy consumption
  • Use green energy when possible
  • Manufacturing also contribute to CO2
    • 30% of the total CO2 emission from a car during its entire life comes from the production…
what do you do
What do you do??

Questions or comments?