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Deemed Energy Savings and Cost-Effectiveness of 80-Plus Power Supplies. RTF January 2007. From Linear to Switching Power Supplies. Published Estimates. Ecos (August 2005) 82 kWh per unit residential 90 kWh per unit commercial 85 kWh weighted average NEEA (March 2005) - PowerPoint PPT Presentation
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Northwest Power and ConservationCouncil
Deemed Energy Savings and Deemed Energy Savings and Cost-Effectiveness of 80-Plus Cost-Effectiveness of 80-Plus
Power Supplies Power Supplies
RTF January 2007RTF January 2007
Northwest Power and ConservationCouncil
Northwest Power and ConservationCouncil
From Linear to Switching Power Supplies
Northwest Power and ConservationCouncil
Published EstimatesPublished Estimates
Ecos (August 2005)Ecos (August 2005)– 82 kWh per unit 82 kWh per unit residentialresidential
– 90 kWh per unit 90 kWh per unit commercialcommercial
– 85 kWh 85 kWh weighted averageweighted average
NEEA (March 2005)NEEA (March 2005)– 76 kWh per unit 76 kWh per unit residentialresidential
– 88 kWh per unit 88 kWh per unit commercialcommercial
– 74 kWh per unit 74 kWh per unit commercial with network offcommercial with network off
– 82 kWh per unit 82 kWh per unit weighted average net of network offweighted average net of network off
Northwest Power and ConservationCouncil
Key Factors Key Factors for Binned Savings Estimatesfor Binned Savings Estimates
Hours in each power consumption binHours in each power consumption bin– Developed by Intel & EcosDeveloped by Intel & Ecos– Set to fit total consumptionSet to fit total consumption
Total consumption based on several sourcesTotal consumption based on several sources– Roth 2002, LBL for Energy Star, EcosRoth 2002, LBL for Energy Star, Ecos
Efficiency by power consumption binEfficiency by power consumption bin– Base case: Intel 2005 required efficiency Base case: Intel 2005 required efficiency – 80-Plus: Bench tests conducted by EPRI-PEAC80-Plus: Bench tests conducted by EPRI-PEAC
Time in standby modeTime in standby mode– LBL “After Hours” reportLBL “After Hours” report
Northwest Power and ConservationCouncil
Changes Since EstimatesChanges Since Estimates
Higher computer power requirementsHigher computer power requirements– Increase savingsIncrease savings
Improving efficiency of non 80-Plus power Improving efficiency of non 80-Plus power suppliessupplies– Decrease savingsDecrease savings
Identified added savings from power factor Identified added savings from power factor correctioncorrection– Add ~25 kWh Add ~25 kWh
Penetration of network off-hours controlPenetration of network off-hours control– UnknownUnknown
Power Supply Specifications
50%
55%
60%
65%
70%
75%
80%
85%
90%
10% 30% 50% 70% 90%
Percent of Full Power
Effi
cie
ncy
I ntel 2005(NEEABaseline)
I ntel 2004RequiredEfficiency(EcosBaseline)
80 PlusRequiredEfficiency
Estimates of Output Power
0
50
100
150
200
250
300
350
400
Ou
tpu
t Pow
er
in W
att
s
Residential &Commercial(NEEA 2005)
Residential(Ecos 2005)
Commercial(Ecos 2005)
Northwest Power and ConservationCouncil
Estimates of Output Power
0
50
100
150
200
250
300
350
400
Ou
tpu
t Pow
er
in W
att
s
Residential &Commercial(NEEA 2005)
Residential(Ecos 2005)
Commercial(Ecos 2005)
Northwest Power and ConservationCouncil
Power Supply Specifications
50%
55%
60%
65%
70%
75%
80%
85%
90%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Percent of Full Power
Effi
ciency
I ntel 2004Spec (NEEABaseline)
I ntel 2005Spec (EcosBaseline)
80 PlusRequiredEfficiency
Northwest Power and ConservationCouncil
Savings from Power Factor CorrectionSavings from Power Factor Correction
Northwest Power and ConservationCouncil
Cost EstimatesCost Estimates
Incremental cost of $5/unit Incremental cost of $5/unit – Declining to $2.50 by 2010Declining to $2.50 by 2010
NEEA program costs estimates ~ $40 per unitNEEA program costs estimates ~ $40 per unit Lifetime: 4 yearsLifetime: 4 years No O&M costsNo O&M costs NEEA B/C ratio: Over 5.0 for venture plus NEEA B/C ratio: Over 5.0 for venture plus
market effectsmarket effects
Northwest Power and ConservationCouncil
IssuesIssues
Update NEEA assumptions?Update NEEA assumptions? Include indirect savings from power factor?Include indirect savings from power factor? Adopt Ecos estimate for servers? Adopt Ecos estimate for servers? Estimate HVAC interactions?Estimate HVAC interactions?
Northwest Power and ConservationCouncil
OptionsOptions
Weights NEEA EcosEcos with PFC
Residential 44% 76 82 97
Commercial 53% 88 90 113
Commercial with Network Off 3% 74 73 91
Weighted Average 82 86 105
Savings in kWh per Year
Northwest Power and ConservationCouncil
RecommendationsRecommendations
Stick with NEEA estimate for nowStick with NEEA estimate for now Ignore savings from power factor correction Ignore savings from power factor correction
until Ecos adopts them until Ecos adopts them Ignore HVAC interactionIgnore HVAC interaction Review Ecos server application savings Review Ecos server application savings
when programs are deployed for serverswhen programs are deployed for servers
