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Is your Refrigerator Running? Load shapes for (mostly) Appliances and other fun facts as measured in RBSA Metering Data not Dogma, July 2014 Ben Larson, Ecotope

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RBSA Metering Background 104 sites 5-minute intervals 2+ years End-uses – HAC – DHW – Appliances – Lights – Consumer electronics

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More RBSA Background First comprehensive end use metering studying since ELCAP (which is now nearly 30 years old) RBSA Metering is scheduled to end on September 30, 2014. – We will have collected ~1/4 of the end use load information the region needs by then. http://rtf.nwcouncil.org/subcommittees/enduseload/R TF%20Executive%20Summary%2030%20SEP%202012% 20v04-1.docx http://rtf.nwcouncil.org/subcommittees/enduseload/R TF%20Executive%20Summary%2030%20SEP%202012% 20v04-1.docx

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Findings: Heat Pumps

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Resistance starts being used at 45F OAT

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Heat pumps still have a long way to go Go ductless???

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We’ve Got One… – Nissan Leaf: 10.25 kWh/day = 3,741 kWh/yr – Wine cooler: 0.38 kWh/day = 139 kWh/yr – Fish tank: 12.8 kWh/day = 4,672 kWh/yr 78 F, 60 gallon, tropical reef: 78 F, 60 gallon, tropical reef: – pumps, skimmer, lights, fans, heater 9

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Fish Tank 10 Fish Tank

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Findings: TVs – Nielsen is Right

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Findings: Appliances Near census achieved in appliance metering (excluded gas dryers and ranges) Appliance Number of appliances On siteMeteredViable data Clothes Washer10310297 Clothes Dryer1039993 Dishwasher936458 Freezer605246 Range (Electric or Gas)1037163 Refrigerator133131120

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Appliance Energy Use Appliance Energy Use per Appliance RBSA Single- Family Survey Energy Use per House Percent of Total Energy kWh/yrSaturationkWh/yr% Clothes Washer550.99542% Clothes Dryer7250.9467930% Dishwasher2390.892139% Freezer6090.5332314% Electric Range3140.8025111% Refrigerator (primary)6041.0060426% Refrigerator (secondary)6000.291748% Overallna 2,298100% Approximately 5% of all houses have gas-fueled dryers. The table reports on electricity only. Seventy-five percent of houses have electric ranges and 85% have electric ovens. The table assumes a combined effective saturation of 80%.

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Refrigerator Annual kWh through the Years Decline of 13.5 kWh/yr Fit conducted only on primary refrigerators

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Hourly and monthly load shapes for primary refrigerators

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Refrigerator cycling over 2 days. 5-minute intervals

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Dishwashers

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Dishwasher Hourly Load Shape

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Laundry

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Dryer energy use vs occupancy

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More Laundry: Dryer Weekly Loadshape

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All Done Travel Safely

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