Grocery Store Measures

Grocery Store Measures

Door Gasket Laboratory Testing

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Agenda

1. BPA Recommendations

2. Gasket Damage, Door Open Times & Gasket Cost Data

3. Emerson Lab Test Results

4. Next Steps

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I. BPA Recommendations

Door Gaskets – Deemed Measure

Automatic Door Closer – Deemed Measure

Case TypeAverage Cost

($/door)Door Open

Time (%)Energy Savings

(kWh/yr/door) B/CLow Temp Reach-in $107 1.5% 410 0.64Med Temp Reach-in $83 0.2% 273 0.56Low Temp Walk-in $116 4.1% 662 0.97Med Temp Walk-in $79 17.6% 361 0.78

KEY ASSUMPTIONS:

a. Energy Savings adjusted for median door open times.

b. Medium Temp Reach-In estimated at 2/3 of Low Temp Reach-In.

c. B/C ratio assumes 4 year measure life.


($/door)

Energy Savings

(kWh/yr/door) B/CLow Temp Reach-in $40 560 2.4Med Temp Reach-in $40 373 1.6Low Temp Walk-in $200 2,806 2.4Med Temp Walk-in $200 241 0.2

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Comparison of Savings (kWh/year/door)

Case TypeCase Temp

Emerson Lab Testing

ExpressEfficiency1 SCE1,3

Reach-In Low 410 2,369 210 - 420

Medium 273 407 98 - 195

Walk-In Low 662 4,708 1060 - 2560

Medium 361 809 200 - 480

Notes:1. Assumes gasket length of 15' for Reach-In and 20' for Walk-In2. Emerson Lab Testing: BPA sponsored Emerson study3. SCE: So. Calif. Edison Work Papers WPSCNRRN0013 (10/2007) and

WPSCNRRN0001, Revision 1 (10/2007)

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II. Gasket Damage

Basis for Lab Testing (Ref. Phase 1 Report, 2/2007).

• Reach-in Low Temp: Very high level of damage near the handle. Typical tear is 6-12 inches

• Reach-in Medium Temp: Typically at bottom of door. Typical tear is 6-12 inches. Ten to twenty percent of damaged gaskets prevent door closure.

• Walk-in Low & Medium Temp: Typical tears are:• Two to three feet in length• Completely missing several feet of gasket• Similar to Swiss cheese in appearance• Hard, brittle and blocking door closure

• The standard used for repair in the PNW is a minimum 6” double tear. A man’s fist should generally fit comfortably through the tear.

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Door Open Times

Number of

DoorsAvg Open Time (Min)

Median Open Time

(Min)

Avg Open

Time (%)

Median Open

Time (%)

All Walk-Ins 14 28.6 4.4 17.0% 9.4%

All Reach-Ins 24 88.7 0.3 7.6% 0.6%

Low-Temp Walk-Ins 4 3.7 4.2 4.5% 4.1%

Med-Temp Walk-Ins 10 38.5 6.1 22.1% 17.6%

Low-Temp Reach-Ins 14 145.6 1.1 12.2% 1.5%

Med-Temp Reach-Ins 10 0.2 0.2 0.6% 0.2%

Methodology:Total of (38) cases monitored at (10) sites: 14 walk-ins & 24 reach-insField Installed, Hobo U-9-001 State Loggers, in place 1 to 4 weeks

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Cost Information

Average of Total Linear Feet

Door Type Total $/lnftTotal Door

Cost

Reach-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

Auto-closer (reach-in) $36 - $40

Auto-closer (walk-in) $100 - $250

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III. Lab Testing

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Laboratory Testing – Interim Results

Completed Gasket and Auto Closer testing and report:Low temperature reach-inLow temperature walk-inMedium temperature walk-in

Completed testing on strip curtains – report under review.

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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 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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Medium Temperature Walk-In Results

Parameter Full

Gasket Damaged

Gasket No

Gasket Average Ambient Dry Bulb Temperature (°F) +73.6 +75.2 +74.9 Average Ambient Wet Bulb Temperature (°F) +57.8 +62.0 +57.7


Average Simulator Temperature (°F) +38.3 +38.2 +38.3 Minimum Avg. Simulator Temperature (°F) +38.2 +38.0 +38.2 Maximum Avg. Simulator Temperature (°F) +38.4 +38.3 +38.5

Condensate Drainage per Hour (oz) 0.833 2.75 2.73 Condensate Drainage per Day (oz) 20.0 66.0 65.6

Duty Cycle (%) 9.4% 10.0% 11.4% Average Power (Watts) 1025.0 1074.4 1157.0

24 Hour Energy (kW-hrs) 24.6 25.8 27.8 Energy increase per day (kW-hrs) Baseline +1.2 +3.2

% energy increase Baseline 4.8% 12.9%

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Next Steps

Finalize report on strip curtains

Conduct UA-testing on walk-in

Evaluate results with wider audience including peer review. Prepare technical paper.

Incorporate revised results into ESG, as appropriate

Supporting Slides

Door Gasket Laboratory Testing

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Steady State Operation Anomalies(Full Gasket / Damaged Gasket)

Condenser Air InletFull: 74.5 F.Damaged: 72.5 F.

Saturated Suction Temperature-36 F.-32 F.

Compressor Operating EERFull: 3.84Damaged: 4.24

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Anomaly Impact on Test Summary

Full Gasket test negatively impacted by 1.7 kWh per day

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Normalized Energy Results

Full Damaged

24 Hour Energy (kWh) 52.6 / 50.9* 54.3 / 54.3

Daily Increase (kWh) Baseline 1.68 / 3.4*

% Daily Increase Baseline 3.2% / 6.7%*

*Italics: original number

Bold: Normalized number

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Door Open Time Study

Total of (38) cases monitored at (10) sites Mix of Walk-Ins and Reach-Ins Field Installed Hobo U-9-001 State Loggers At least one week; up to four weeks

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Avg Median 70% 90% 95% 99%

All Walk-Ins (14) 28.6 0.6 1.7 11.1 93.3 1,476.9All Reach-Ins (24) 88.7 0.2 95.7 499.5 636.3 1,195.6Low-Temp Walk-Ins (4) 3.7 0.7 1.4 7.0 12.2 88.7Med-Temp Walk-Ins (10) 38.5 0.5 1.8 12.7 125.7 2,032.2Low-Temp Reach-In (14) 145.6 0.2 157.1 820.4 1,045.1 1,962.6Med-Temp Reach-In (10) 0.2 0.1 0.2 0.3 0.5 2.2

Duration of Door Openings (Minutes)

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Door Open Times – by Case Type

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

All Walk-Ins (14) All Reach-Ins (24) Low-Temp Walk-Ins(4)

Med-Temp Walk-Ins(10)

Low-Temp Reach-Ins(14)

Med-Temp Reach-Ins(10)

Pro

po

rtio

n o

f D

oo

r O

pe

n T

ime

s

>30:00

10:00 - 30:00

5:00 - 10:00

3:00 - 5:00

2:30 - 3:00

2:00 - 2:30

1:45 - 2:00

1:30 - 1:45

1:15 - 1:30

1:00 - 1:15

0:45 - 1:00

0:30 - 0:45

0:15 - 0:30

< 0:15

Open Times (min:sec)

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0%

20%

40%

60%

80%

100%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

>30:00

10:00 - 30:00

5:00 - 10:00

3:00 - 5:00

2:30 - 3:00

2:00 - 2:30

1:45 - 2:00

1:30 - 1:45

1:15 - 1:30

1:00 - 1:15

0:45 - 1:00

0:30 - 0:45

0:15 - 0:30

< 0:15

Door Number

Duration of Opening

Proporation of Total Openings

Door Open Times

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Product Type

0

1

2

3

4

5

6

7

8

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Pizza Beer Deli Dairy Ice Cream Meat FrozenFoods

Other

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Estimated Annual Energy Savings - Door Closers


($/door)

Energy Savings

(kWh/yr/door) B/CLow Temp Reach-in $40 279 1.2Med Temp Reach-in $40 186 0.8Low Temp Walk-in $200 2,806 2.4Med Temp Walk-in $200 241 0.2

a. Energy Savings adjusted for median door open times.b. Medium Temp Reach-In assumed to be 2/3 of Low Temp Reach-In.c. B/C ratio assumes 4 year measure life.d. Energy Savings assume door is left open 25% of time.

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History – Average Gasket Damage

Grocery Store Measures

Documents

Transcript of Grocery Store Measures