Measurement and Verification of Refrigeration Measures in 4 Grocery Stores in Pacific County

Presented to the Regional Technical ForumAugust 8th, 2006

Introduction

Review Work to Date with NRM Present Results of M&V for 4 stores in

Pacific County Present recommendations for future

grocery store M&V.

February 7th 2005

RTF reviewed and approved NRM measures and calculation methodology on a pilot basis:

Require 3rd-party M&V on first 10 projects.

Revise credit as indicated after completion of first 10 projects.

March 2005

BPA developed M&V plan for pilot.By BPA Two week pre/post installation electrical

power metering. Pre/post installation review of equipment

and operation.By NRM Detailed pre-installation audit and post

installation data collection.

June 2005 – Pacific County Incentive Offer

Location kWh Savings Cost ($) Incentive Owner's Cost SavingsPayback

(yrs)

Riverdale Grocery 28,570 $9,012 $7,714 $1,802 $1,914 0.9

Ilwaco Marketplace 31,523 $13,391 $8,511 $4,879 $2,112 2.3

Okies Food Center #2 68,139 $23,828 $18,398 $5,431 $4,565 1.2

Pioneer Market & Deli 31,955 $10,406 $8,628 $2,081 $2,141 1.0

Okies Select Market 32,333 $12,012 $8,730 $3,282 $2,166 1.5

Pioneer Market 42,572 $17,341 $11,494 $5,846 $2,852 2.0

Total 235,092 85,989 $63,475 $23,322 $15,751 1.5

July–November 2005 - BPA Baseline Metering

5 stores 10 site visits over 5 months Average 32 man-hours per store in

combined travel and in-store time. Labor Intensive Adds months of time

RESULTS

Baseline Compressor-Condenser Unit Duty Cycle & Run-Time kW Load

Observed NRM*Cooler 52% 53%Freezer 68% 53%

Cooler kW 4.3 4.3Freezer kW 4.6 4.3

* NRM assumes 55% Duty Cycle for units during non-winter months (OSA temp > 35 degrees F), otherwise 35%.

Post-Install Compressor – Condenser Unit Duty Cycle

Observed NRM*Cooler 33% ~42%Freezer 64% ~42%

* NRM assumes 55% Duty Cycle for units during non-winter months (OSA temp > 35 degrees F), otherwise 35%.NRM estimates 3% reduction in compressor-condenser unit duty cycle thru direct digital temp controls. Further reductions in duty cycle estimated by reduced refrigeration load due to ECM motor installations, but not directly specified in % basis.

Reduced Compressor Duty Cycle

Observed NRM*Cooler 19% ~11%Freezer 3% ~11%

* NRM estimates reduction in compressor-condenser unit duty cycles due to combination of measures – direct digital control, evaporator fan cycling, and ECM motor installations. Due to ECM motor installations only in coolers, not freezers, NRM estimated % reductions should be slightly higher for cooler compressor-condenser units compared to freezers [NRM calculations do not directly specify % duty cycle reductions for specific measures, only kWh per year.]

Compressor-Condenser Units per Stores Coolers & Freezers

See Spreadsheet

Note large variance in run-time kW, from low of 1.6 to high of 10.3.

Baseline Door Heater Duty Cycle & Average Connected Load (kW)

Observed NRM*Cooler X 100%Freezer X 100%

Cooler Door (kW) 87 95Freezer Door (kW) 170 195* NRM assumes 100% duty cycle pre-installation. Site visits did not conflict with this

assumption, but note difficulty in metering (CT sizes, access, etc.), as well as a difference in temperature felt and measured at several doors.

Post-Installation Average Door Heater Duty Cycle & Annual kWh per Door Savings

Observed NRM*Cooler 4% 21%Freezer 54% 59%

Cooler Door826 644(kWh/yr Savings)

Freezer Door 822 744(kWh/yr Savings)

Door Heater Control Results per Stores, Coolers & Freezers

See Spreadsheet Cooler Door Heater Control with

average B/C ratio = 2.57 Freezer Door Heater Control with

average B/C ratio = 1.40

Sampling of Baseline Evaporator Fan Connected Load (kW) – Metered to NRM Estimates

Observed (kW) NRM (kW)Bev. Cooler (10) 1.25 1.173Produce Cooler (4) 0.36 0.704Bev. Cooler (10) 1.65 1.955Meat Cooler (3) 0.61 0.528

Misc. Freezer (4) 0.37 0.938Meat Freezer (2) 0.27 0.352Misc. Freezer (3) 0.91 0.587

Post-Installation Average Evaporator Fan Duty Cycling

Observed NRM*Cooler 59% 68.78%Freezer 63% 68.78%

Post-Installation Evaporator Fan % Savings and Fan kWh per Year Savings from Control Measure

Observed NRM*Cooler 41% 31.22%Freezer 37% 31.22%

Cooler Fan 583 444(kWh Savings per Year)

Freezer Fan575 485(kWh Savings per Year)

Evaporator Fan Control Measure Results per Store, Coolers and Freezers

Cooler Units with Average B/C Ratio = 2.74

Freezer Units with Average B/C Ratio = 1.40

See Spreadsheet

New Evaporator Fan ECM Motors Connected Load (kW) – Metered to NRM Estimates

Observed (kW) NRM (kW)*Produce Cooler (4) 0.17 0.4224Bev. Cooler (10) 0.93 1.197

* NRM assumes a 40% reduction in motor load.

Vendor Beverage CoolersObserved Percent kWh Savings

Description % Savings

1 - Two (2) Door Pepsi 20%

2 - Two (2) Door RC 40%

3 - Three (3) Door Pepsi 36%

4 - One (1) Door Pepsi 18%

1 - Two (2) Door Coca Cola 47%

2 - Two (2) Door Unit 50%

3 - Three (3) Door Unit 40%

4 - Misc. 48%

1 - Snapple 18%

Average 35%

Vendor Beverage CoolersSummary

Summary Averaged Results

kWh/yr Savings Cost ($) B / C Ratio

1,023 $320 1.34

ObservedNRM*

% Savings 35% 36%

Store Total Results

Location Total Savings

Total Cost ($) to Implement Measures

Benefit to Cost Ratio (using commercial

refrigeration measure/profile)

Oakie's Food Center #2, Ocean Park

Oakie's Mkt., Naselle

Pioneer Mkt., Long Beach

Pioneer Grocery, South Bend

1.44

0.83

1.52

1.57

$31,835.89

$8,083.59

$10,163.43

$17,312.32

109,737

15,971

36,979

64,821

Pacific County Grocery Stores - Monthly Consumption

0

20000

40000

60000

80000

100000

120000

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Mo

ntl

ly C

On

sum

pti

on

(kW

h)

Okies - Ocean Park

Pioneer Grocery - South Bend

Okies - Naselle

Pioneer Mkt - Long Beach

Recommendations

Extend as pilot for 1-year Continue approval of NRM package of

measures. Continue approval of NRM savings

calculation methodology.