commercial refrigerators and freezers efficiency standards, savings, and cost rtf meeting july 1,...
TRANSCRIPT
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