it greening
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Computer Power Consumption Study. Christian Grieco Time Warner Cable [email protected]. IT Greening. Purpose of Study. Ascertain an estimate of expenditure on electricity to power staff computer infrastructure - PowerPoint PPT PresentationTRANSCRIPT
Purpose of Study
• Ascertain an estimate of expenditure on electricity to power staff computer infrastructure
• Determine $ savings potential in implementing various measures to improve efficiency without affecting productivity
DOE & EPA Computer Electricity Research
• $25 - $75 savings per computer per year• 39% of computers in businesses are left powered
on overnight and weekends• Study translates to savings of $13,750 - $41,250
yearly on DESKTOPS alone • Laptop savings not estimated as part of this study
Estimate of PC Inventory
550 Desktops
420 Laptops
750 Flat Screen monitors
? CRT monitors
• 550 Desktops
• 420 Laptops
• 750 Flat Screen monitors
• ? CRT monitors
Methodology• Use Kill A Watt device to measure actual
electricity consumption of desktop and laptop computer
• Measure usage• no power savings 24 hours• no power savings 8.5 hours• power savings 24 hours• power savings 8.5 hours
Business Class Laptop
Device Power Draw ( in watts)
Laptop 17
Monitor 26
Printer Standby
11
Printer Printing 530
Business Class Desktop
DevicePower Draw ( in
watts)
Desktop 68
Monitor 24
Business Class
Desktops Laptops Flat screens
Business Class Laptop
TimeframePower
Consumption
24 hours 1.40 kWh
8.5 hours .49 kWh
Non business hours
.91 kWh
Power off the machine to realize 65% savings
Even with no power saving features set
Business Class Desktop - NO Power Savings
TimeframePower
Consumption
24 hours 1.77 kWh
8.5 hours 1.00 kWh
Non business hours
.77 kWh
Power off the machine to realize 44% savings
Even with no power saving features set
Business Class Desktop With Power Savings Features
TimeframePower
ConsumedSavings usingPower Savings
Combined Savings
24 hours 1.04 kWh .73 kWh
8.5 hours .81 kWh .19 kWh .96 kWhNon
business hours
.23 kWh .54 kWh
Enable Power Savings & Power Off to realize 54 % Savings
Telemarketing
Desktops Laptops Flat screens
Estimated Yearly Savings Potential
off @ night 3 weeks per month 10 out of 12 monthsbased on 550 desktop computers with ONE monitor
Eliminate212,982 pounds of CO2
EstimatedTotalExpenditureon Power
Generates408,870poundsCO2