1 ECM Motors Nonresidential HVAC Stakeholder Meeting #2 California Statewide Utility Codes and Standards Program Heschong Mahone Group, Inc. Portland Energy Conservation, Inc. CTG Energetics Taylor Engineering December 9, 2010
2 ASHRAE 6 Small ECM Motors Summary of current code requirements Typical practice Summary of code change proposals Data/findings Specifics of code change proposals Remaining data collection and analysis Specific stakeholder requests
Current Code Requirements 3 New Energy Policy and Conservation Act (EPCA) requirements for small motors Ruling Effective: April 8, 2010 New Standards Applied Starting: March 9, 2015 Sets Efficiency Requirements for Certain Classes of Motors Capacitor-Start Capacitor-Run (CSCR) Capacitor-Start Induction-Run (CSIR) Polyphase But Not Others Permanent-Split Capacitor (PSC) Electronically Commutated (ECM)
Current Code Requirements 4 New Energy Policy and Conservation Act (EPCA) requirements for small motors Does not cover motors that are part of equipment that is covered under other efficiency requirements
Current Code Requirements 5 Large Motors (1 HP to 200 HP) already covered (premium efficiency motors required by Title 20 1605.1(s) )
Current Code Requirements 6 For fractional motors below 1 HP there are no California standards in place except for in series fanpowered VAV boxes (T24-2008 144.c.4) Refrigerated warehouses require ECM motors (T24-2008 126.c.1)
Typical Practice 7 Small Variable-Speed Motors are PSC Class not covered by new EPCA requirements ECM Motors More Efficient for both variable speed and single speed applications
ECM Efficiency Source ECMpapst 8
Potential Code Change Proposals 9 Extend ECM requirements to all fractional motors in HVAC duty If justified, require everywhere then set exception for motors below run-time threshold
Initial Data / Findings 10 What is an ECM Motor? Electronically Commutated Motor DC brushless motor with permanent magnet rotor and built-in inverter DC motors more efficient than AC, easier to control Typical HVAC-duty efficiencies: 65% - 72% What is a PSC Motor? Permanent Split Capacitor induction motor Typical HVAC-duty efficiencies: 12% - 45%
Initial Data / Findings 11 Recent DOE Ruling on Small Motors contains detailed cost data and economic analysis
Planned Analysis 12 More energy and cost analysis More CO sensor accuracy research More diesel emissions research Field study of CO sensor accuracy
Data Collection and Analysis 13 Collect data on types of motors used in California Collect cost data for appropriate classes of motors Analyze cost effectiveness for higher-efficiency motors based on run-time
Cost Data 14 Cook 1/4hp EC motors (mounted on a direct drive dome style fan) for an add of $434.00 to the fan price Motor is 1/4hp 115/1/60VAC, 1725rpm with internal speed control and potentiometer speed controller. 1/2hp EC motors (mounted on a direct drive dome style fan) for an add of $447.00 to the fan price Motor is 1/2hp 115/1/60VAC, 1725rpm with internal speed control and potentiometer speed controller. Greenheck 1/12 hp - $185 1/8 hp - $ 185 1/4 HP - $140
15 ASHRAE 6 Small ECM Motors QUESTIONS & COMMENTS