GrocerSmart TM Energy Modeling Software -Revision Status Report- & -Request For Input- July 13,...

GrocerSmartTM

Energy Modeling Software -Revision Status Report-

& -Request For Input-

July 13, 2010

Agenda• Last time• Summary of last RTF presentation June 1 2010• Updated analyses

– Defrost - Subcommittee feedback incorporated and measure bundle sensitivity evaluated

• Libraries– Selection methodologies to review

• Compressors, Condensers, Cases

– Key criteria and direction Approved by subcommittee

– Lighting – Approved by subcommittee

Last time we met• Approved

– Lighting data

– Key Criteria

– Condenser library

• To be approved today– Libraries

– Selection methodologies

– Lighting – Approved by subcommittee

Future requests for approval from RTF

• Request full RTF approval for direction of GrocerSmart 4.0 at August 2010 meeting– Methodology (DOE 2.2r as reasonable live

model, template)– Data sets– Phases

• Return to RTF Q2 2011 for final request for approval of new version

Task list and future requests of RTF by Phase

New GS 4.0 (Phase 1) New GS 4.0 (Phase 2)

Savings calculation methodology

Live modeling DOE2.2r (Pending subcommitteeapproval), (RTF approval August 2010)

Live modeling DOE2.2r(No future requests of RTF)

In template Building envelope, HVAC and efficient scenariorefrigeration systems (Pending subcommitteeapproval), (RTF approval August 2010)

Building envelope and HVAC (RTF Phase 2 approval by Q4 2011)

Compressors Real world baseline (Pending subcommittee approval)(RTF approval August 2010)Standardized efficient equipment (RTF approved)

Real world baseline(No future requests of RTF)Real world efficient equipment(RTF Phase 2 approval by Q4 2011)

Refrigerant Real world data(Pending subcommittee approval), (RTF approvalAugust 2010)

Real world data(No future requests of RTF)

Display cases Real world baseline, standardizedefficient equipment (RTF approved)

Real world baseline andefficient equipment (RTF Phase 2 approval by Q4 2011)

Control strategies and setpoints

Real world baseline, standardizedefficient equipment (RTF approved)

Real world baseline andefficient equipment (RTF Phase 2 approval by Q4 2011)

Condensers Real world data (Pendingsubcommittee approval), (RTF approval August 2010)

Real world data(No future requests of RTF)

Summary of immediate project direction

• Work toward subcommittee recommendation for: – Method

• Interface drives inputs of key criteria• Key criteria drive inputs to live DOE2.2r model• Data in libraries and selection/filtering method• Model runs vs. fixed efficient scenario

– Phased approach for further improvements

Defrost

Sensitivity

Case Defrost Survey

0

10

20

30

40

50

60

70

20 24 45 46 60

Minutes of Defrost

Nu

mb

er

of

Ca

se

s

Weighted Average:49 min

2% 3%

58%

5%

32%

ECM MeasureBaseline to Measure Energy Savings at Various Defrost Minutes

7.0%

7.1%

7.2%

7.3%

7.4%

7.5%

28 42 56 84

Minutes of Defrost Per Day

Pe

rce

nta

ge

Sa

vin

gs

Electric

Hot Gas

49

Reasonable Range For Market Representation

88,597 kWh Savings

88,522 kWh Savings

7.44%

7.36%

Savings calculated with the lowest and highest number of

defrost minutes per day differ by about 1%

(From 7.44% of system energy use to 7.36%)

Energy Efficient Case MeasureBaseline to Measure Energy Savings at Various Defrost Minutes

16.5%

16.6%

16.7%

16.8%

16.9%

17.0%

28 42 56 84

Minutes of Defrost Per Day

Pe

rce

nta

ge

Sa

vin

gs

Electric

Hot Gas

49


201,298 kWh Savings

200,608 kWh Savings

16.92%

16.70%

Savings calculated vary by about 1%(From 16.92% of system energy use to

Floating Head Pressure ControlBaseline to Measure Energy Savings at Various Defrost Minutes

11.5%

11.6%

11.7%

11.8%

11.9%

12.0%

28 42 56 84

Minutes of Defrost per Day

Pe

rce

nta

ge

Sa

vin

gs

Electric

Hot Gas


49

141,610 kWh Savings

141,650 kWh Savings

11.90%

11.79%

Savings calculated vary by about 1%(From 11.90% of system energy use to 11.79%)

Floating Suction Pressure ControlBaseline to Measure Energy Savings at Various Defrost Minutes

2.0%

2.1%

2.2%

2.3%

2.4%

2.5%

2.6%

2.7%

2.8%

2.9%

28 42 56 84


Pe

rce

nta

ge

Sa

vin

gs

Electric

Hot Gas


49

24,490 kWh Savings

35,010 kWh Savings

2.06%

2.78%


ECM and Floating Head MeasuresBaseline to Measure Energy Savings at Various Defrost Minutes

11.6%

11.7%

11.8%

11.9%

12.0%

12.1%

28 42 56 84


Pe

rce

nta

ge

Sa

vin

gs

Electric

Hot Gas


49

143,240 kWh Savings

143,460 kWh Savings

12.03%

11.93%


ECM, Floating Suction, and Floating Head PressureBaseline to Measure Energy Savings at Various Defrost Minutes

13.5%

13.6%

13.7%

13.8%

13.9%

14.0%

14.1%

14.2%

14.3%

14.4%

14.5%

28 42 56 84


Pe

rce

nta

ge

Sa

vin

gs

Electric

Hot Gas

49


171,250 kWh Savings

161,890 kWh Savings13.60%

14.19%


Efficient Case with Floating Head PressureBaseline to Measure Energy Savings at Various Defrost Minutes

19.0%

19.1%

19.2%

19.3%

19.4%

19.5%

19.6%

28 42 56 84


Pe

rce

nta

ge

Sa

vin

gs

Electric

Hot Gas


49

231,830kWh Savings

231,640kWh Savings

19.48%

19.28%


Efficient Cases with Floating Head and Suction PressureBaseline to Measure Energy Savings at Various Defrost Minutes

20.5%

20.6%

20.7%

20.8%

20.9%

21.0%

28 42 56 84


Pe

rce

nta

ge

Sa

vin

gs

Electric

Hot Gas

49


245,480 kWh Savings

249,110 kWh Savings

20.62%

20.77%

Savings calculated vary by less than 1%(From 20.77% of system energy use to 20.62%)

Floating Suction and Head Pressure MeasureBaseline to Measure Energy Savings at Various Defrost Minutes

13.1%

13.2%

13.3%

13.4%

13.5%

13.6%

13.7%

13.8%

13.9%

14.0%

14.1%

28 42 56 84


Pe

rce

nta

ge

Sa

vin

gs

Electric

Hot Gas

49


159,720 kWh Savings

168,670 kWh Savings

13.42%

13.97%


Recommendation

• We propose that a standard, market data informed configuration for defrost cycle and length can be assumed for powered defrost, and that this assumption will cause minimal variance in calculated energy savings (typically < 1%).

• Recommendation is a total of 49 minutes/day, using the number of defrost cycles as appropriate for the case type

Libraries

Libraries

• Condensers

• Cases

• Compressors

• Lighting

Condenser Library

Name Model number Type Refrigerant Fan hpSingle or Double

RowNumber of fans No. of pumps Rated air flow(CFM)

Capacity (MBh/10 TD)

Fan kW EER

Bohn BNQ-S01-A005 Air-Cooled R-22 0.5 Single 1 N/A 5,400 52 0.373 139.41 Bohn BNQ-S01-A006 Air-Cooled R-22 0.5 Single 1 N/A 5,200 61 0.373 163.54 Bohn BNQ-S02-A008 Air-Cooled R-22 0.5 Single 2 N/A 11,200 80 0.746 107.24 Bohn BNQ-S02-A010 Air-Cooled R-22 0.5 Single 2 N/A 10,800 103 0.746 138.07 Bohn BNQ-S02-A011 Air-Cooled R-22 0.5 Single 2 N/A 10,400 115 0.746 154.16 Bohn BNQ-S03-A016 Air-Cooled R-22 0.5 Single 3 N/A 16,100 156 1.119 139.41 Bohn BNQ-S03-A017 Air-Cooled R-22 0.5 Single 3 N/A 15,600 172 1.119 153.71 Bohn BNQ-S04-A021 Air-Cooled R-22 0.5 Single 4 N/A 21,500 207 1.492 138.74 Bohn BNQ-S04-A023 Air-Cooled R-22 0.5 Single 4 N/A 20,800 229 1.492 153.49 Bohn BNQ-S05-A026 Air-Cooled R-22 0.5 Single 5 N/A 26,900 259 1.865 138.87 Bohn BNQ-S05-A029 Air-Cooled R-22 0.5 Single 5 N/A 26,000 286 1.865 153.35 Bohn BNQ-S06-A034 Air-Cooled R-22 0.5 Single 6 N/A 31,200 344 2.238 153.71 Bohn BNQ-S07-A042 Air-Cooled R-22 0.5 Single 7 N/A 36,400 416 2.611 159.33 Bohn BNQ-D04-A016 Air-Cooled R-22 0.5 Double 4 N/A 22,300 160 1.492 107.24 Bohn BNQ-D04-A021 Air-Cooled R-22 0.5 Double 4 N/A 21,500 207 1.492 138.74 Bohn BNQ-D06-A023 Air-Cooled R-22 0.5 Double 6 N/A 20,800 229 2.238 102.32 Bohn BNQ-D06-A031 Air-Cooled R-22 0.5 Double 6 N/A 32,300 310 2.238 138.52 Bohn BNQ-D06-A034 Air-Cooled R-22 0.5 Double 6 N/A 31,200 344 2.238 153.71 Bohn BNQ-D08-A041 Air-Cooled R-22 0.5 Double 8 N/A 43,000 414 2.984 138.74 Bohn BNQ-D08-A046 Air-Cooled R-22 0.5 Double 8 N/A 41,600 458 2.984 153.49 Bohn BNQ-D10-A052 Air-Cooled R-22 0.5 Double 10 N/A 53,700 518 3.73 138.87 Bohn BNQ-D10-A057 Air-Cooled R-22 0.5 Double 10 N/A 52,100 573 3.73 153.62 Bohn BNQ-D12-A069 Air-Cooled R-22 0.5 Double 12 N/A 62,500 687 4.476 153.49 Bohn BNQ-D14-A083 Air-Cooled R-22 0.5 Double 14 N/A 72,900 831 5.222 159.13

Condenser Selection

List of possible condensers with capacity within 5% of

previously determined refrigeration load multiplied by over sizing factor. FEA

selects condenser that most closely matches over

size load

Data set for condenser included in

model

Field staff enters condenser characteristics;· Type· Refrigerant· Number of Fans· Number of Rows

.

Condenser data filtered by

condenser characteristics

Model number present

Field staff audits condenser NO

FEA audits cases and walk-ins, and

the evaporator loads are summed.

Is condenser model in library?

YES

NO

Are there condensers in the library within a 5% variance of refrigeration load multiplied by

over size factor?

Refrigeration load is

multiplied by oversize factor

YES

Condenser with closest capacity that is less than

refrigeration load multiplied by oversize

factor is selected

YES

NO

If condenser model was not located in library during audit, model is re-ran

post-audit with correct manufacturer’s information prior to incentive

calculation, and updated data is added to GrocerSmart library.

RS Survey showing design multiplier calculation for condensers

Store Temp Evaporator Load Total Condenser Capacity Type Oversize FactorStore A LT 67,600 103,200 Air 1.5Store A MT 192,840 314,500 Air 1.6Store B LT 108,120 147,500 Air 1.4Store B MT 341,620 496,200 Air 1.5Store B MT 75,000 92,700 Air 1.2Store C LT 208,024 325,293 Air 1.6Store C MT 399,220 582,517 Air 1.5Store C MT 374,509 539,122 Air 1.4Store D MT 317,924 507,477 Air 1.6Store D MT 100,760 162,592 Air 1.6Store E LT 180,810 277,600 Air 1.5Store E MT 154,000 173,400 Air 1.1Store E MT 520,640 840,100 Air 1.6Store F LT 64,000 114,775 Air 1.8Store F MT 241,000 400,512 Air 1.7

Air Cooled Condenser average over-size factor =

1.5

Evap Cooled Condenser average over-size factor =

2.1

(This is a small sample of surveyed stores)Store Temp Evaporator Load Total Condenser Capacity Type Oversize Factor

Store D LT 137,090 331,500 Evap 2.4Store D MT 53,330 105,408 Evap 2.0Store G MT 348,690 705,700 Evap 2.0Store H LT 109,400 238,400 Evap 2.2Store M LT 43,200 95,410 Evap 2.2Store M LT 113,000 241,037 Evap 2.1Store O LT 73,020 152644 Evap 2.1Store P HT 470,300 884700 Evap 1.9Store S LT 15,450 28583 Evap 1.9Store V LT 137,530 248424 Evap 1.8Store X LT 50,750 96751 Evap 1.9Store Z LT 68,660 126938 Evap 1.8

Case Library

Manufacturer TYPE Compressor Type Light Fan ASH Product Type ModelNUMBER-OF-

DOORSHill Phoenix DOORS MULTI-DECK CONVENTIONAL T8 SHADED POLE NA FROZEN FOOD ONRZHBO 2Hill Phoenix DOORS MULTI-DECK PARALLEL LED ECM NA FROZEN FOOD ONRZHBO 2Hill Phoenix DOORS MULTI-DECK CONVENTIONAL T8 SHADED POLE STANDARD FROZEN FOOD RBH-8 2Hill Phoenix DOORS MULTI-DECK CONVENTIONAL T8 SHADED POLE STANDARD FROZEN FOOD RBH-12 3Hill Phoenix DOORS MULTI-DECK PARALLEL LED SHADED POLE STANDARD FROZEN FOOD RBH-8 2Hill Phoenix DOORS MULTI-DECK PARALLEL LED SHADED POLE STANDARD FROZEN FOOD RBH-12 3Hill Phoenix DOORS MULTI-DECK PARALLEL T8 SHADED POLE NA FROZEN FOOD RZH-2 2Hill Phoenix DOORS MULTI-DECK PARALLEL T8 SHADED POLE NA FROZEN FOOD RZH-3 3Hill Phoenix DOORS MULTI-DECK PARALLEL T8 SHADED POLE NA FROZEN FOOD RZH-4 4Hill Phoenix DOORS MULTI-DECK PARALLEL T8 SHADED POLE NA FROZEN FOOD RZH-5 5Hill Phoenix DOORS MULTI-DECK PARALLEL T8 SHADED POLE NA FROZEN FOOD RIZH-2 2Hill Phoenix DOORS MULTI-DECK PARALLEL T8 SHADED POLE NA FROZEN FOOD RIZH-3 3Hill Phoenix DOORS MULTI-DECK PARALLEL T8 SHADED POLE NA FROZEN FOOD RIZH-4 4Hill Phoenix DOORS MULTI-DECK PARALLEL T8 SHADED POLE NA FROZEN FOOD RIZH-5 5Hill Phoenix DOORS MULTI-DECK NA NA SHADED POLE STANDARD FROZEN FOOD CZERC 5Hill Phoenix DOORS MULTI-DECK NA NA SHADED POLE STANDARD FROZEN FOOD CZERF 5Hill Phoenix DOORS MULTI-DECK NA T8 SHADED POLE STANDARD FROZEN FOOD ORZC 5Hill Phoenix DOORS MULTI-DECK NA T8 SHADED POLE STANDARD FROZEN FOOD ORZF 5Hill Phoenix DOORS MULTI-DECK NA T8 SHADED POLE STANDARD FROZEN FOOD ZER 5Hill Phoenix DOORS MULTI-DECK NA T8 SHADED POLE STANDARD FROZEN FOOD ZERGC 5Hill Phoenix DOORS MULTI-DECK NA T8 SHADED POLE STANDARD FROZEN FOOD ZERGF 5Hill Phoenix DOORS MULTI-DECK NA T8 SHADED POLE STANDARD FROZEN FOOD ZR2G 5Hill Phoenix DOORS MULTI-DECK NA T8 SHADED POLE STANDARD FROZEN FOOD ZRTGC 5Hill Phoenix DOORS MULTI-DECK NA T8 SHADED POLE STANDARD FROZEN FOOD ZRTGF 5

Cases Selection

List of possible cases from library with varying zone loads within 5% of previously RTF approved default zone load

for case type

Data set for case

included in model

Field staff enters case characteristics; · Manufacturer· Type of Case· Configuration· Product Type· Line-Up length· Number of Doors· Lighting Type· Fan Type· ASH Type

Case library data filtered by

case characteristics

GrocerSmart displays approved default zone load

for case type

Model number present ?

Field staff audits refrigerated cases

in store

YES

NO

Field staff double checks auto populated library

data against actual case load, lights, and fans

YES

Is the model number in the GS4 Library

NO

Field Staff compares default zone load with

library choices. Is there a reasonable match?

FEA Chooses library values for

case

YES

FEA Chooses previously RTF approved default

zone load for case type

NO

If case model was not in library at audit, the correct case information is entered into the model post-audit to calculate incentive payments, and

the library will be updated with the correct load information for that case.

Compressor Library

Manufacture Model Application Refrigerant Min SCT Max SCT Min SST Min SSTCopeland 2DA3-0600-TFC LT 22 70 130 -40 0Copeland 2DA3-060E-TFC LT 22 70 130 -40 0Copeland 2DA3-060E-TFD LT 22 70 130 -40 0Copeland 2DA3-060L-TFC LT 22 70 130 -40 0Copeland 2DA3-060L-TFD LT 22 70 130 -40 0Copeland 2DA3-0750-TFC AC 22 70 140 10 55Copeland 2DA3-0750-TFC MT 22 70 140 -5 45Copeland 2DA3-075E-TFC AC 22 70 140 10 55Copeland 2DA3-075E-TFC MT 22 70 140 -5 45Copeland 2DA3-075L-TFC AC 22 70 140 10 55Copeland 2DA3-075L-TFC MT 22 70 140 -5 45Copeland 2DA3F23K0-TFC LT 22 70 130 -40 0Copeland 2DA3F23KE-TFC LT 22 70 130 -40 0Copeland 2DA3F23KE-TFC LD 22 40 130 -40 0Copeland 2DA3F23KE-TFD LD 22 40 130 -40 0

Performance Curves

Enthalpy tRefrigeran Flow MassCapacity Cooling

Copeland Database

Mass Flow Capacity

Cooling Capacity

Power Draw

Carlyle Database

Cooling Capacity

Power Draw

DOE2.2r Inputs

Mass Flow Capacity

Power Draw

Compressor Selection

Data set for case

included in model

FEA is prompted to increase HP of compressors to more closely match evaporator

load

Are the Compressors Copeland?

Field staff audits compressors in

store

FEA audits cases and walk-ins, and

the evaporator loads are summed.

Are the Compressors in the

library?

Are the compressor capacities within 10% of the refrigeration load multiplied

by over size factor?

YES

Compressor performance data is mapped to

comparable Copeland model. NO

FEA enters estimated horsepower. A compressor

with matching hp and refrigerant is selected from

eQUEST library.

NO

Refrigeration load is multiplied by standard design

over size factor.

Yes

NO

YES

If compressors were not in library, compressor performance data is

collected and implemented in model by engineering prior to incentive

payment. New compressor data is incorporated into library.

RS Survey showing design multiplier calculation for compressor

LT Compressor average over-size

factor = 1.2

Store Temp Evaporator Load TotalCompressor Capacity Total Oversize FactorStore C LT 208,024 219,200 1.1Store D LT 137,090 197,419 1.4Store F LT 64,000 71,600 1.1Store H LT 109,400 139,500 1.3Store I LT 24,700 30,900 1.3Store L LT 105,000 159,300 1.5Store O LT 73,020 88,804 1.2Store P LT 75,310 94,200 1.3Store S LT 15,450 17,300 1.1Store T LT 144,890 166,600 1.1Store U LT 132,350 164,977 1.2Store V LT 137,530 167,220 1.2Store X LT 50,750 57,597 1.1Store Y LT 165,000 226,900 1.4Store Z LT 68,660 77,040 1.1

Store Temp Evaporator Load TotalCompressor Capacity Total Oversize FactorStore A MT 192,840 229,900 1.192180046Store B MT 341,620 382,700 1.120250571Store B MT 75,000 76,600 1.021333333Store C MT 399,220 440,300 1.102900656Store C MT 374,509 417,600 1.115059985Store D MT 317,924 352,498 1.108749261Store D MT 53,330 60,988 1.143596475Store D MT 100,760 115,298 1.144283446Store E MT 520,640 582,600 1.119007376Store F MT 241,000 281,500 1.168049793Store G MT 348,690 469,000 1.345034271Store H MT 120,800 142,300 1.177980132Store I MT 92,130 99,582 1.080885705Store J MT 844,970 942,269 1.115150834

MT Compressor average over-size

factor = 1.1

Discussion

GrocerSmart TM Energy Modeling Software -Revision Status Report- & -Request For Input- July 13,...

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