1. Cooling datacentres and a other stuff Ole Kjærgaard Technical Director, Mail: Ole.Kjaergaard@uni-c.dk

2. First some facts UNIC - Danish IT Centre for Education and Research UNIC is an agency under the Danish Ministry of Education. UNIC delivers a variety of IT services to the educational and research communities. More than one million users regularly benefit from UNIC’s services and products. UNIC has more than 300 employees, and offices in Copenhagen, Lyngby and Aarhus.

3. Our green approach The datacentre (approx. 1.500 sqm.) Finding power consuming devices Awareness campaigns Intelligent houses

4. 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

5. Cooling machines Free cooling Intelligent control Increase water temp.

6. Before and after optimization

7. Cooling in the datacentre Increase air temp. Placing down-flow units

8. Finding optimal places for down- flow units

10. 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.

11. Our PUE

12. 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 UNIC…

14. Finding equipment that uses power (looking for sources of heat)

15. Example Which machine has the highest stand-by consumption?

16. Results… Printers Xerox multifunction (daytime)93 W HP Color 470017 W HP Color 370014 W HP S/H 220011 W Mailing/postage machine 7 W Fax37 W

17. Awareness campaigns Buy some (good) energy meters Distribute them!

18. My office PC Guess the power consumption?

19. 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

20. Intelligent houses Connecting light and access control/alarm Use standby functions (Coffee makers, printers etc) Simple things (on/off timers) Motion detectors Light sensors

21. General considerations Think CO 2 instead of energy consumption Use green energy when possible Manufacturing also contribute to CO 2 30% of the total CO 2 emission from a car during its entire life comes from the production…

22. What do you do?? Questions or comments?