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National WAP Evaluation: Savings and Opportunities for Baseload Electric

National WAP Evaluation: Savings and Opportunities for Baseload Electric. David Carroll APPRISE. Presentation Overview. WAP PY 2008 Electric Baseload Installation Rates WAP PY 2008 Electric Baseload Savings Estimates Opportunities – Electric Usage by Low Income Households

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National WAP Evaluation: Savings and Opportunities for Baseload Electric

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  1. National WAP Evaluation: Savings and Opportunities for Baseload Electric David Carroll APPRISE

  2. Presentation Overview • WAP PY 2008 Electric Baseload Installation Rates • WAP PY 2008 Electric Baseload Savings Estimates • Opportunities – Electric Usage by Low Income Households • Missed Opportunities – Behavior Related Savings Opportunities

  3. WAP PY 2008 Electric Baseload installation rates

  4. Climate Zones

  5. Electric Baseload Measure Installation Rates by Climate Zone

  6. Electric Baseload Measure Installation Rates by Building Type

  7. Refrigerator Replacement • PY 2008 Installation Rate • 17% of weatherization clients • 2005 RECS Data: • Households with refrigerator 20 years or older = 14% • Households with refrigerator 10-19 years = 24% • 20 Years or older will be pre 1992 and have highest savings potential

  8. CFL Installation • PY 2008 Installation Rate • 60% of weatherization clients • 2005 RECS Data: • Households with 1 or more CFLs = 31%

  9. WAP PY 2008 Electric Baseload savings estimates

  10. Electric Baseload Savings Estimates

  11. 2005 Electric usage by low income households in single family homes

  12. Electric Usage – Low Income Single Family with Gas Main Heating Fuel

  13. Missed opportunities – behavior related electric energy savings

  14. ECW Plug Load StudyPotential Education Savings

  15. Dehumidifier • Incidence • 6% of low income households have a dehumidifier • Potential Savings • 2 kWh per day * 180 days = 360 kWh

  16. Projection TV • Incidence • 18% of low income households have a large screen tv • Potential Savings • 20 W per hour * 12 hours = 240 Wh • .24 kWh per day * 365 days = 91.25 kWh

  17. Projections vs. Impacts • Basic Projection Methodology • Assumptions • Measure installation rates • Measure retention rates • Pre installation usage • Measure effectiveness

  18. Projections vs. Impacts • Basic Projection Methodology • Calculation • Average household saving = Measure Installation Rate * Measure Retention Rate * (Pre Installation Usage – Post Installation Usage)

  19. Projections vs. Impacts • Basic Projection Methodology • Calculation • Pre Installation Usage per bulb per hour = 60 watts * .001 = .06 kWh • Post Installation Usage per bulb per hour = 13 watts * .001 = .013 kWh • Change per Bulb per hour =.06 - .013 = .047 kWh

  20. Projections vs. Impacts • Basic Projection Methodology • Calculation • Change per bulb per day = .047 kWh * 2.5 hours/day = .1175 kWh/day • Change per bulb per year = . 1175 kWh/day * 365 days = 43 kWh/year

  21. Projections vs. Impacts • Basic Projection Methodology • Calculation • Number installed per home = 43 kWh * 8 bulbs = 344 kWh • Retention rate = 344 kWh *.8 = 275 kWh saved per home per year

  22. Projections vs. Impacts So simple, what could go wrong… • Incorrect assumptions • Measure installation rate • Measure retention rate • Bulbs left for occupants to install • Bulbs removed • Bulbs broken • Existing bulb kWh • Hours of use

  23. Projections vs. Impacts So simple, what could go wrong… • Interactions • Adding up individual measure savings can overstate results • Need to account for reduced heat gain from CFLs • Increase heating usage • Reduce cooling usage

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