1 / 13

Network PC Power Management

Network PC Power Management. June 28, 2011 Regional Technical Forum Presented by: Bob Tingleff SBW Consulting, Inc. Status. Provisionally deemed UES since May, 2010 SBW presented an update May, 2011 Incorporated Cadmus/PSE and Avista studies

mardi
Télécharger la présentation

Network PC Power Management

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Network PC Power Management June 28, 2011 Regional Technical Forum Presented by: Bob Tingleff SBW Consulting, Inc.

  2. Status • Provisionally deemed UES since May, 2010 • SBW presented an update May, 2011 • Incorporated Cadmus/PSE and Avista studies • Minor changes based on review of literature • HVAC factor findings • Different than lighting • Difficult to pin down • RTF Decision: Use lighting HVAC factors • Large office, K-12, Other (small office/RTU HVAC) • This path incorporates an impact appropriate to building type/HVAC system

  3. Measure Definition – 9 measures rather than 1 due to HVAC factors • 3 building/business types • Large Office (central HVAC) • K-12 • Other, represented by Small Office (RTU) • 3 HVAC system types • Electric • Heat pump • Gas

  4. Key Parameters • Power draw of desktop • Mix of Class A, B, C, D, Energy Star compliant and not • Power draw of monitor • 2008 E-Star LCD (lower power when sleeping) • Baseline time spent in low and high power • Shift in annual hours due to measure • 23% of annual hours shift from high to low power • Supported by Cadmus/PSE study • Consistent with earlier studies

  5. Key Parameters • Rate of successful installation of power management software • May change over time – new computers, software defeated intentionally or accidentally, bugs, IT diligence • No empirical basis for measure persistence • Load shapes show far from complete success (next slide) • Previous analysis derated savings based on an assumed installation rate • Current analysis already includes the installation rate in the average hourly shift

  6. Do we need to adjust savings by business type? • Because of HVAC factors we now have K-12, Large Office, Other (small office HVAC) • Annual and daily schedules differ • Adjusting the overall load shape to match K-12, office results in an annual savings difference of 5% • Other schedules are hard to quantify • => Use office hours for all measures • Two Procostload shapes: Office, K-12

  7. Savings Impact • Without HVAC factors: 26% increase • Monitor savings increased from 11 kWh/yr. to 18 • Lower power draw in sleep mode in newer monitors • Previous analysis derrated savings by assumed installation rate of power management software • This analysis finds that empirical studies already incorporate this factor • Newer computers have lower sleep-mode power • New studies find a couple more percent shifted to low power by measure

  8. Savings Impact: Difference with Cadmus/PSE study • Cadmus: 128 kWh/yr. • This analysis: 145 kWh/yr. • Monitor savings: 18 kWh/yr. vs. 11 • Idle power draw of desktop: 64W vs. 60W • 64W is based on sales data • Could argue that schools and other likely environments will buy smaller computers • Don’t really know the mix • Cadmus data show many computers at 80W or more (63W average at non-participant sites)

  9. Recommendations • Set status to Active • Sunset criteria • Desktop power draw will change • Baseline rate of power management may change • 2 years max

  10. RTF Proposed Motion: “I _________ move that the RTF approve the Network PC Power Management UES measure to Active status with a sunset date of July, 2013.”

More Related