Power UsEd By Computers
Power UsEd By Computers. By: Wyatt Berlinic and Lyndon Chan. Outline. Possible interpretations Global Home University Engineering Our interpretation Focus on computers in the engineering building Extrapolate this data to the rest of the campus.
Power UsEd By Computers
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Presentation Transcript
Power UsEd By Computers By: Wyatt Berlinic and Lyndon Chan
Outline • Possible interpretations • Global • Home • University • Engineering • Our interpretation • Focus on computers in the engineering building • Extrapolate this data to the rest of the campus. • Chose this interpretation because we could make the measurements and do actual calculations.
What we did • We purchased a blue planet EM100 energy meter from Canadian Tire • We then sampled different computers around the Engineering Building for power consumption
Assumptions • Computers with the same CPU and GPU consumed the same amount of power • The computers are not used 70% of the time • Power consumption would not increase by much when in use • The cost of electricity is 10.61 cents/kWh
Power Measurements (Computers) Xi lab could not be measured, as it is running on the servers
Power Measurements (Monitors) • Each monitor uses about 35W of power when the computer is in use and when a screen saver is on. • The monitors use almost no power when asleep. We measured 0W. • We have counted 231 monitors in the Engineering labs, giving us a total of ~8 kW
Comparison of Results • A typical household uses an average power of 1kW 1 • The computers here use as much power as nine households, and 17 households with monitors • The total energy wasted in a year is equal to 119 100W light bulbs running all year round
Estimation of University Computers • Estimated total number of computers on campus from Student Computing website • Since the computers generally have one monitor, we estimate each computer to use 80W • 68 labs X 20 computers per lab = 1360 total computers • Total power 109 kW • Yearly energy 953 088 kWh • Yearly cost $101 123
Power Saving Recommendations • Put computers to sleep 30 minutes after logging off • Power usage in sleep mode is about 5W including monitors 2 • In engineering, 96 561 kWh could be saved each year saving $10 245
Conclusions • A large portion of the university’s power is wasted by leaving computers on all the time • This wasted power can be mostly saved by sleeping computers when idle • Remote desktop is important, so software could be added to wake sleeping computers
References [1] K. J. Cassidy (2005). What’s a Watt [Online]. Available: www.solartanic.com/index_022.htm [2] M. Bluejay (2011). How much electricity do computers use? [Online]. Available: michaelbluejay.com/electricity/computers.html
