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Refrigerator Running? Load Shapes for Appliances: RBSA Metering Data Findings

Explore RBSA Metering data from July 2014, including insights on heat pumps, Nissan Leaf energy usage, fish tanks, and household appliances. Get detailed analyses of refrigerator, dishwasher, and laundry energy consumption patterns to optimize usage. Delve into interesting facts and data to enhance your understanding of household energy usage.

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Refrigerator Running? Load Shapes for Appliances: RBSA Metering Data Findings

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  1. 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

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

  3. 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/RTF%20Executive%20Summary%2030%20SEP%202012%20v04-1.docx

  4. Findings: Heat Pumps

  5. Resistance starts being used at 45F OAT 

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

  7. 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: • pumps, skimmer, lights, fans, heater

  8. Fish Tank Fish Tank

  9. Findings: TVs – Nielsen is Right

  10. Findings: Appliances • Near census achieved in appliance metering (excluded gas dryers and ranges)

  11. Appliance Energy Use 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%.

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

  13. Hourly and monthly load shapes for primary refrigerators

  14. Refrigerator cycling over 2 days. 5-minute intervals

  15. Dishwashers

  16. Dishwasher Hourly Load Shape

  17. Laundry

  18. Dryer energy use vs occupancy

  19. More Laundry: Dryer Weekly Loadshape

  20. All Done • Travel Safely

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