ECM Motors Nonresidential HVAC Stakeholder Meeting #2

Transcription

1 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 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

3 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)

4 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

5 Current Code Requirements 5 Large Motors (1 HP to 200 HP) already covered (premium efficiency motors required by Title (s) )

6 Current Code Requirements 6 For fractional motors below 1 HP there are no California standards in place except for in series fanpowered VAV boxes (T c.4) Refrigerated warehouses require ECM motors (T c.1)

7 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

8 ECM Efficiency Source ECMpapst 8

9 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

10 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%

11 Initial Data / Findings 11 Recent DOE Ruling on Small Motors contains detailed cost data and economic analysis

12 Planned Analysis 12 More energy and cost analysis More CO sensor accuracy research More diesel emissions research Field study of CO sensor accuracy

13 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

14 Cost Data 14 Cook 1/4hp EC motors (mounted on a direct drive dome style fan) for an add of $ 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 $ 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 15 ASHRAE 6 Small ECM Motors QUESTIONS & COMMENTS