1. Northwest Power and Conservation Council Deemed Energy Savings and Cost-Effectiveness of 80-Plus Power Supplies RTF January 2007

2. Northwest Power and Conservation Council slide 2

3. Northwest Power and Conservation Council slide 3 From Linear to Switching Power Supplies

4. Northwest Power and Conservation Council slide 4 Published Estimates Ecos (August 2005) Ecos (August 2005) –82 kWh per unit residential –90 kWh per unit commercial –85 kWh weighted average NEEA (March 2005) NEEA (March 2005) –76 kWh per unit residential –88 kWh per unit commercial –74 kWh per unit commercial with network off –82 kWh per unit weighted average net of network off

5. Northwest Power and Conservation Council slide 5 Key Factors for Binned Savings Estimates Hours in each power consumption bin Hours in each power consumption bin –Developed by Intel & Ecos –Set to fit total consumption Total consumption based on several sources Total consumption based on several sources –Roth 2002, LBL for Energy Star, Ecos Efficiency by power consumption bin Efficiency by power consumption bin –Base case: Intel 2005 required efficiency –80-Plus: Bench tests conducted by EPRI-PEAC Time in standby mode Time in standby mode –LBL “After Hours” report

6. Northwest Power and Conservation Council slide 6 Changes Since Estimates Higher computer power requirements Higher computer power requirements –Increase savings Improving efficiency of non 80-Plus power supplies Improving efficiency of non 80-Plus power supplies –Decrease savings Identified added savings from power factor correction Identified added savings from power factor correction –Add ~25 kWh Penetration of network off-hours control Penetration of network off-hours control –Unknown

7. Northwest Power and Conservation Council slide 7

8. Northwest Power and Conservation Council slide 8

9. Northwest Power and Conservation Council slide 9 Savings from Power Factor Correction

10. Northwest Power and Conservation Council slide 10 Cost Estimates Incremental cost of $5/unit Incremental cost of $5/unit –Declining to $2.50 by 2010 NEEA program costs estimates ~ $40 per unit NEEA program costs estimates ~ $40 per unit Lifetime: 4 years Lifetime: 4 years No O&M costs No O&M costs NEEA B/C ratio: Over 5.0 for venture plus market effects NEEA B/C ratio: Over 5.0 for venture plus market effects

11. Northwest Power and Conservation Council slide 11 Issues 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?

12. Northwest Power and Conservation Council slide 12 Options

13. Northwest Power and Conservation Council slide 13 Recommendations Stick with NEEA estimate for now Stick with NEEA estimate for now Ignore savings from power factor correction until Ecos adopts them Ignore savings from power factor correction until Ecos adopts them Ignore HVAC interaction Ignore HVAC interaction Review Ecos server application savings when programs are deployed for servers Review Ecos server application savings when programs are deployed for servers