Commercial Refrigeratorsand Freezers

Efficiency Standards, Savings, and Cost

RTF MeetingJuly 1, 2008

Background• Model Variations

– Door Type• Sold Door• Glass Door• Combination

– Temperature• Refrigerator• Freezer• Combination

– Aesthetics• Standard Line• Specification Line

– Purpose• Reach-In• Under counter• Roll-in/Roll-through• Pass-through

• Where savings come from– Improved face frame design– Lower wattage anti-sweat heaters– High efficiency evaporator and condenser fan motors– Higher efficiency compressor– Optimized refrigeration system design– Improved insulation

Efficiency Standards• CEE:

• OR & WA– Minimum efficiency standards in place earlier this year (CEE Tier 1).

• Federal Minimum– Will go into effect 2010 (CEE Tier 1)

• Energy Star– Currently set at the same level as CEE Tier 1, OR and WA code and the 2010 Fed minimum

(exception: No standard for glass-door refrigerators or freezers).– New spec to be finalized by April 2009, to go into effect January 2010.

Energy Savings• CEE Tier 1 Energy Use – CEE Tier 2 Energy Use• Updated analysis using new CEE lists.• Savings weighted equally based on CEE list• kWh/year:

New Analysis (using updated CEE List) 5 to 30 cu.ft. 30 to 60 cu.ft. 60 to 90 cu.ft.Solid Door Refrigerators 535 944 1395Glass Door Refrigerators 514 878 1244Solid Door Freezers 797 2230 3333

Old Analysis (ComRefrigFreezerFY07v1_0.xls)

5 to 30 cu.ft. 30 to 60 cu.ft. 60 to 90 cu.ft.

Solid Door Refrigerators 720 1148 1495Glass Door Refrigerators 720 1148 1495Solid Door Freezers 1325 2660 4486

Percent Change 5 to 30 cu.ft. 30 to 60 cu.ft. 60 to 90 cu.ft.Solid Door Refrigerators -26% -18% -7%Glass Door Refrigerators -29% -24% -17%Solid Door Freezers -40% -16% -26%

Cost• Previous version of RTF assumptions used a 3 year payback

as the basis for the incremental cost.• Incremental Cost is very difficult to determine through

catalog/online price research.• For example: Freezers 30-70 cu.ft. showed an incremental cost

of $1490 with one manufacturer and negative $260 with another.

• Efficiency doesn’t seem to be related to cost.• In 2002, ADL/DOE/Delfield re-designed the Delfield

“Vantage” refrigerator line. • $0 incremental cost (actually less expensive to produce than the

baseline model) • 68% energy savings over baseline model

Recommendations

• Update Savings based on most recent CEE list.– Combine Glass Door and Solid Door Refrigerators as

one measure by using the average savings:

• Assume Incremental Cost is $0.• Efficiency standards remain at CEE Tier 2 levels

until Energy Star specifications are put in place.

Proposed Savings (kWh/year) 5 to 30 cu.ft. 30 to 60 cu.ft. 60 to 90 cu.ft.Solid or Glass Door Refrigerators 524 911 1319Solid Door Freezers 797 2230 3333