Grocery Store Measures

Door Gasket, Automatic Door Closers, and Strip Curtain

Laboratory Testing

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Agenda1. Field Research – PECI2. Lab Testing – BPA3. EnergySmart Grocer Program Changes -

BPA

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I. Field Research PECI captured following gasket data

Door type Product Door Manufacturer Gasket Type Door Dimensions Length of damage Description of damage

Captured data for 350 reach-in and walk-in doors. Mainly C-Stores

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Field Research Results

Case Type Average Damage (inches)

Low Temp Reach-n 12

Med Temp Reach-in 27

Walk-in Low Temp 12

Walk-in Med Temp 31

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Door Open Times (Preliminary)

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0 5 10 15 20 25 30 35 40

Logger Number

Do

or

Op

en

(%

)

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Type of Case

0

2

4

6

8

10

12

14

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Low Temp Reach In Medium Temp Reach In Low Temp Walk In Medium Temp Walk In

Nu

mb

er

in S

am

ple

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Average Door Open Times

Case Type Avg. Open Time

Low Temperature Reach-In 8.0%

Low Temperature Walk-In 4.5%

Medium Temp Reach-In 0.5%

Medium Temp Walk-In 10%

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Cost Information

Average of Total Linear FeetDoor Type Total $/lnft Total Door CostReach-In Low Temp 15 7 107$ Reach-In Med Temp 17 5 83$ Walk-In Low Temp 17 7 116$ Walk-In Med Temp 16 5 79$ Walk-In Med Temp - Glass entry Door 19 5 95$ (blank)Grand Total 16

Auto-closer (reach-in) $36 - $40Auto-closer (walk-in) $100 - $250

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II. Lab Testing

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Lab Testing Plans Door Gaskets

3 Cases: Low Temperature Walk-In, Medium Temperature Walk-In, Low Temperature Reach-In

3 Conditions: No Gasket, Typical Damaged Gasket, Fully Functional Gasket

Strip Curtains 2 Cases: Low Temperature Walk-In, Medium

Temperature Walk-In Automatic door opening of 4 minutes/2 hours. Compare to Fully Functional Gasket

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Laboratory Testing – Interim Results

Completed testing and report on low temperature reach-in.

Completed testing and report on low temperature walk-in.

Completed testing on medium temperature walk-in – report in 1 week.

Completed testing on strip curtains – report in 2 weeks.

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Testing Procedures & Discussion Emerson Climate Technologies

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Low Temperature Reach-In Results

Parameter Full Gasket Damaged

Gasket No

Gasket Number of Defrost cycles per day 1 2 4

Average Ambient Dry Bulb Temperature (°F) +75.1 +74.5 +74.6 Average Ambient Wet Bulb Temperature (°F) +63.8 +64.5 +63.1

Average Condenser Air Intake Temperature (°F) +74.8 +72.5 +73.5

Average Simulator Temperature (°F) 0.0 -0.5 +29.6 Minimum Simulator Temperature (°F) -12.0 -13.1 +15.0 Maximum Simulator Temperature (°F) +15.0 +15.0 +47.2

Condensate Drainage per Defrost (oz) 6.8 19.5 83 Condensate Drainage per Day (oz) 6.8 39.0 332

(1)Duty Cycle (%) (1)70.8% (1)75.1% (1)94.3% Average Power (Watts) 2190.2 2260.3 2578.8

24 Hour Energy (kW-hrs) 52.6 54.3 (2)61.9 Energy Increase per Day (kW-hrs) Baseline +1.68 (2)+9.33

% energy increase Baseline 3.2% (2)17.7%

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Low Temperature Walk-In Results

Parameter Full Gasket Damaged

Gasket No

Gasket Number of Defrost cycles per day 2 2 2

Average Ambient Dry Bulb Temperature (°F) +74.0 +75.0 +76.6 Average Ambient Wet Bulb Temperature (°F) +60.8 +61.7 +63.5

Average Condenser Air Intake Temperature (°F) +73.7 +74.8 +76.3

Average Simulator Temperature (°F) -4.7 -4.4 -3.7 Minimum Avg. Simulator Temperature (°F) -5.0 -4.7 -3.9 Maximum Avg. Simulator Temperature (°F) -4.5 -4.2 -3.3

Condensate Drainage per Defrost (oz) 13.0 22.6 168 Condensate Drainage per Day (oz) 26.0 45.2 336

(1)Duty Cycle (%) (1)38.4% (1)43.3% (1)72.3% Average Power (Watts) 2279.7 2358.3 3620.4

24 Hour Energy (kW-hrs) 54.7 56.6 86.9 Energy increase per day (kW-hrs) Baseline +1.9 +32.2

% energy increase Baseline 3.5% 58.9%

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Lab Testing vs Real World

Lab Test Real World Energy Savings Impact

Ambient humidity control No ambient humidity control +/- Average humidity could be more or less than test conditions.

No door openings

Door openings - Product stocking, consumer purchases

- Door openings = more ambient air into case and more compressor energy use.

Gasket damage = gap Gasket damage = tear - How much tear damage is equal to 1 foot of gap?

Time initiate/temperature terminate defrost

Timed defrost

+ Temperature-termination defrost control saves energy.

Single dedicated compressor Multiple compressors &/or multiple cases on single compressor No impact

New Reach-In Case Old/Refurbished, etc

+ New is more energy efficient (better insulation, better condition, controls, …)

+ = Energy savings in the Real World are greater than in the Lab.

- = Energy savings in the Real World are less than in the Lab.

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ESG Program Changes Currently - assign 0 kWh/yr to door

gaskets and closers for approx. 10 miles of installed gaskets and over 150 automatic door closers.

Now – Assign energy savings based on lab testing (slides following).

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Estimated Annual Energy Savings

Reach-In Low Temp Walk-In Low TempkWh/door kWh/door

Gasket Condition

Amount of Damage, ft

Adjusted Savings

Amount of Damage, ft

Adjusted Savings

Good 0 0 0 0

Damaged 1 190 2 662

No Gasket 11 1,041 21.5 11,224

Gaskets - Tested

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Estimated Annual Energy SavingsGaskets – Proposed

Case TypeAverage Damage

(inches)Average Cost

($/door)Energy Savings (kWh/yr/door) B/C

Low Temp Reach-in 12 $107.22 190 0.30Med Temp Reach-in 27 $82.95 143 0.29Low Temp Walk-in 12 $116.38 331 0.47Med Temp Walk-in 31 $78.79 285 0.59

a. Energy Savings adjusted for average door open times and average damage. b. Medium Temp Walk-In assumed to be 1/3 of Low Temp. Subject to revision pending lab test results.c. Medium Temp Reach-In assumed to be 1/3 of Low Temp.d. B/C ratio assumes 4 year measure life

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Estimated Annual Energy SavingsAuto Door Closers (= No Gasket)

Case TypeAverage Cost

($/door)Energy Savings (kWh/yr/door) B/C

Low Temp Reach-in $40 1,561 6.6Med Temp Reach-in $40 520 2.2Low Temp Walk-in $200 5,612 4.7Med Temp Walk-in $200 1,871 1.6

a. Energy Savings adjusted for average door open times. Assume door is closed 50% of the time.b. Medium Temp Walk-In assumed to be 1/3 of Low Temp. Subject to revision pending lab test results.c. Medium Temp Reach-In assumed to be 1/3 of Low Temp.d. B/C ratio assumes 4 year measure life

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Next Steps Complete test reports on Medium

Temperature Walk-In and Strip Curtains. Evaluate results with wider audience

including peer review. Incorporate revised results into ESG, as

appropriate. RTF provisionally deemed measures