Out-Of-Compliance Grocery UES Measure Recommendations

Regional Technical ForumMarch 18, 2014

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Presentation Outline• Background• Measure Overview• Staff Highlighted Areas• UES Workbook

– Measure Descriptions– Measure Analysis and Input Details– Savings, Cost, and Cost Effectiveness

• RTF Staff Recommendation• Proposed Decision

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Background• Multiple Grocery measures found Out-of-Compliance

– Subsequent analysis determined remaining potential small– Extended sunset date at November 2013 meeting– Staff to develop plan to bring back into compliance

• Grocery measures in question:1. ECMs for Walk-ins 2. Walk-in Evaporator Fan ECMotor Controllers3. Compressor Head Fan Motor Retrofit to ECM4. Floating Head Pressure Controls for Single Compressor Systems5. Autoclosers6. Door Gasket Replacement7. Display Case LEDs (Open Cases)8. Strip Curtains

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Measure Overview

• Plan to go through each measure individually• Seeking decision on methodology of 3 measures

presented– Need to be updated with finalized EER results

• If 15% lower EER value, then ~5% increase in savings

• Staff working with PECI to obtain updates to other five grocery measures

• Will request sunset extension on measures not presented today

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ECMs for Walk-ins

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Measure Overview

• What does it do?– Replaces existing Shaded Pole motor with a more

efficient Electrically Commutated Motor (ECM)– Savings occur from:

• Direct motor wattage reduction• Waste heat reduction to refrigeration system

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Recommendation Memo ItemsRecommendation Memo Item Status Staff Response

The Average EER parameter is based on proprietary DOE 2.2-R simulations of Northwest grocery environments. This parameter needs to be derived transparently from publically available data.

Done Limited remaining potential and classification as a Small Saver alleviates the need to collect data. Used PECI modeling analysis to derive value.

The sources for the Fan Input Power parameter are not published. Provide a summary of the analyses performed on the raw data to obtain the referenced values.

Done Online check of motor sources confirms wattages used are sufficient.

Further documentation is needed for Annual Fan Runtime Hours. If documentation is not available, use the suggested value of 8,322 sourced from Pacific Gas and Electric (PGE) and Southern California Edison (SCE) work papers.

Done Used recommended source of SCE 2012 workpaper for defrost cycle time of 72 minutes per day.

The sources noted for the Mix of Rated Fan Power and Mix of Low and Medium Temperature Walk-ins parameters should be more thoroughly documented.

Done PECI has provided weightings based on site audit data. Weightings match ECM for Reach-in case measure.

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Staff Highlighted Areas• Weighting of motors into one category have large

variation for smaller sized motors• Measure is retrofit, therefore a pre-conditions

baseline– Unsure of current market practice for motor replacement

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Motor Weighting

• PECI provided motor weights for 3 motor classes: 1/20HP, 1/15HP, and 16-23 Watt

• Difference in weighted average for small motors

Med Temp Shaded Pole to ECM in

walk-in - 37 Watt Output (1/20 HP)

Med Temp Shaded Pole to ECM in

walk-in - 49.7 Watt Output (1/15 HP)

Low Temp Shaded Pole to ECM in

walk-in - 37 Watt (1/20 HP)

Low Temp Shaded Pole to ECM in

walk-in - 49.7 Watt (1/15 HP)

Med Temp Shaded Pole to ECM in walk-in - 16-23

Watt Output

Low Temp Shaded Pole to ECM in walk-in - 16-23

Watt Output

0

200

400

600

800

1000

1200

1400

1600

Savi

gns (

kWh/

ry) 25%

75%

Wtd. Average

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Motor Weighting

• Ok to leave as 1 measure based on PECI weighting of expected program conditions?

• Split into two measures? – One for 1/15 & 1/20– One for 16-23 Watt

• Staff Recommendation: Split into two measures to account for savings variation

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Pre-conditions

• RUL needs to be estimated for pre-conditions– DEER provides estimate of 5 years

• What is current practice at end of RUL?– If shaded pole motors only, then RUL=EUL– If combination of shaded pole and ECM, then:

• Full savings and cost assigned during RUL period• Reduced savings and cost assigned for remaining EUL period

• Do we want to do this for small savers?• Staff Recommendation: Assume current practice is

100% Shaded Pole and assign savings accordingly

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Measure Descriptions

• Go to the following sections in the Summary tab in the proposed measure workbook:– Measure Properties– Measure Identifiers

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Measure Analysis and Inputs Details

• Go to the following sections in the Summary tab in the proposed measure workbook:– Constant Parameters– Energy Savings Estimation Method, Parameters

and Data Sources– Measure Incremental Costs and Benefits– Measure Lifetime

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Savings, Cost, & Cost Effectiveness

• Go to the following sections in the Presentation tab in the proposed measure workbook:– Measure savings– Measure costs– Measure TRC B/C ratios

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RTF Staff Recommendation• Approve the ‘ECMs for Walk-ins’ UES measure

as a “Small Saver”– Update EER values with finalized numbers once

analysis is complete (~4% increase in savings)• Split measure into two identifiers• Assume current practice = all Shaded Pole• Set the measure status to “Active”• Set the sunset date to March, 2019

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Proposed Decision

“I _______________ move that the RTF:

Pick one of each:• [Split into two measures / weight into one measure]; and• Assume current practice is [all Shaded Pole / x.x % is

ECM];

and• Approve the ‘ECM for Walk-ins’ measure as a “Small

Saver” UES;• Set the measure status to ‘Active;’ and• Set the sunset date to March, 2019.”

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ECMotor Controller for Evaporator Fans on Walk-ins

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Measure Overview

• What does it do?– Installs a motor controller on Evap. systems

already equipped with ECMs– Provides 2-speed operation of fans

• High when cooling; low when not– Savings occur from:

• Direct motor wattage reduction due to full speed runtime hours reduction

• Waste heat reduction to refrigeration system

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Recommendation Memo ItemsRecommendation Memo Item Status Staff Response

Recommend collecting primary meter data or use a sufficiently reliable secondary data source to establish the Full Speed Fan Motor Input Power for the 16 to 23 watt motor size category.

Done Used fan motor power from ECM replacement analysis. Derived from manufacturer data.

Recommend collecting primary meter data or use a sufficiently reliable secondary data source to establish the Low Speed Fan Motor Input Power.

Done Used fan laws to ratio high/low power consumption based off full speed input power. Exponent set at 2.5 (Professional Judgment).

The Average EER parameter is based on proprietary DOE 2.2-R simulations of Northwest grocery environments. This parameter needs to be derived transparently from publically available data.

Done Limited remaining potential and classification as a Small Saver alleviates the need to collect data. Used PECI modeling analysis to derive value.

Further documentation is needed for Annual Fan Runtime Hours.

Done Relied on NRM metering study for this parameter and provided documentation on study when possible.

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Staff Highlighted Areas• None

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Measure Descriptions

• Go to the following sections in the Summary tab in the proposed measure workbook:– Measure Properties– Measure Identifiers

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Measure Analysis and Inputs Details

• Go to the following sections in the Summary tab in the proposed measure workbook:– Constant Parameters– Energy Savings Estimation Method, Parameters

and Data Sources– Measure Incremental Costs and Benefits– Measure Lifetime

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Savings, Cost, & Cost Effectiveness

• Go to the following sections in the Presentation tab in the proposed measure workbook:– Measure savings– Measure costs– Measure TRC B/C ratios

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RTF Staff Recommendation• Approve the ‘ECMotor Controller for

Evaporator Fans on Walk-ins’ UES measure as a “Small Saver”– Update EER values with finalized numbers once

analysis is complete (~6% increase in savings)• Set the measure status to “Active”• Set the sunset date to March, 2019

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Proposed Decision

“I _______________ move that the RTF:

• Approve the ‘ECMotor Controller for Evaporator Fans’ measure as a “Small Saver” UES;

• Set the measure status to ‘Active;’ and• Set the sunset date to March, 2019.”

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Compressor Head Fan Motor Retrofit to ECM

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Measure Overview

• What does it do?– Replaces existing Shaded Pole motor with a more

efficient Electrically Commutated Motor (ECM) on a compressor head fan

– Savings occur from:• Direct motor wattage reduction

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Recommendation Memo ItemsRecommendation Memo Item Status Staff Response

Provide data sources with metered data to justify baseline and efficient Input Motor Wattage assumptions.

Done Online check of motor sources confirms wattages used are sufficient.

Revise annual run time to apply Duty Cycle of 70% instead of 75%, based on revised values reported in Navigant Consulting’s “Energy Savings Potential and R&D Opportunities for Commercial Refrigeration Equipment.”

Done Updated assumption with more recent data as per recommendation memo.

Additional data should be collected for the Fan Motor Size Population Weighting which was supplied by one grocery chain based on a review of its own refrigeration equipment.

Done No additional data available. Uptake has been minimal, and Kroger is primary target of measure. Propose to keep weighting as-is using grocery store values.

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Staff Highlighted Areas• None

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Measure Descriptions

• Go to the following sections in the Summary tab in the proposed measure workbook:– Measure Properties– Measure Identifiers

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Measure Analysis and Inputs Details

• Go to the following sections in the Summary tab in the proposed measure workbook:– Constant Parameters– Energy Savings Estimation Method, Parameters

and Data Sources– Measure Incremental Costs and Benefits– Measure Lifetime

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Savings, Cost, & Cost Effectiveness

• Go to the following sections in the Presentation tab in the proposed measure workbook:– Measure savings– Measure costs– Measure TRC B/C ratios

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RTF Staff Recommendation• Approve the ‘Compressor Head Fan Motor

Retrofit to ECM’ UES measure as a “Small Saver”

• Set the measure status to “Active”• Set the sunset date to March, 2019

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Proposed Decision

“I _______________ move that the RTF:

• Approve the ‘Compressor Head Fan Motor Retrofit to ECM’ measure as a “Small Saver” UES;

• Set the measure status to ‘Active;’ and• Set the sunset date to March, 2019.”

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OTHER OOC GROCERY MEASURES

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RTF Staff Recommendation• Staff needs more time to incorporate changes

and data from PECI• Request 3 month sunset extension for the

following measures:

Measure Status Sunset Date

Grocery - Floating Head Pressure Controls for Single Compressor Systems Out-of-Comp. June, 2014

Grocery - Autoclosers Out-of-Comp. June, 2014

Grocery - Door Gasket Replacement Out-of-Comp. June, 2014

Grocery - Display Case LEDs (Open Cases) Out of Comp. June, 2014

Grocery - Strip Curtains Out-of-Comp. June, 2014

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Proposed Decision“I _________ move that the RTF extend the sunset dates for the following measures shown below.”

Measure Status Sunset Date

Grocery - Floating Head Pressure Controls for Single Compressor Systems Out-of-Comp. June, 2014Grocery - Autoclosers Out-of-Comp. June, 2014Grocery - Door Gasket Replacement Out-of-Comp. June, 2014Grocery - Display Case LEDs (Open Cases) Out of Comp. June, 2014Grocery - Strip Curtains Out-of-Comp. June, 2014