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Green Motors. Review of Existing Deemed Savings Regional Technical Forum July 7 th , 2009. Background.

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Green motors

Green Motors

Review of Existing Deemed Savings

Regional Technical Forum

July 7th, 2009


Background

Background

  • The Green Motors Practices Group (GMPG) encourages high quality motor rewind practices to save energy. Green Motors Service Centers sign a commitment to follow the Green Motors rewind protocol and the GMPG follows up with QC/QA.

  • Concept proposed to RTF May 2007. Deemed savings originally approved July 2007, slightly revised July 2008.


Savings calculation key inputs

Savings Calculation: Key Inputs

  • Baseline Motor Efficiency = NEMA Premium Efficiency – Standard Rewind Efficiency Reduction

    Table: Standard Rewind Efficiency Reductions

    Original Source: MotorMaster+ Manual (p. 31: ≤40 hp = 1%; >40 hp = 0.5%)

    Another Source: “The Effect of Repair/Rewinding on Motor Efficiency”, EASA/AEMT (p. 1-5: 6 motors in 100-150hp range rewound without controls lost 0.6% efficiency)

  • “Upgrade” Motor Efficiency = NEMA Premium Efficiency

  • Assumed Motor Loading: <100 hp = 60%; ≥100 hp = 70%

    Source: “Achieving More with Less: Efficiency and Economics of Motor Decision Tools”, Advanced Energy. (Study of 100 motors showed average loading of 68.2%)

  • Hours of Operation

    Industrial

    Source: United States Industrial Electric Motor Systems Market Opportunities Assessment, published by US Department of Energy December 1999, Motor Challenge, see Section 1, page 42

    Agriculture

    < 100 hp = 1800 hrs/year; ≥ 100 hp = 2000 hrs/year


Cost assumptions

Cost Assumptions


Economics

Economics

Note: Preliminary estimated 6th Plan cutoff for cost-effectiveness is about 120 mils/kWh for lost-opportunity measures.


Decision

Decision

  • Continue with deemed savings numbers?

  • Any adjustments?


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