Remodece

1
Remodece

• Energybox Progress Report
• Swiss Experience
• with Household Electricity
• Conrad U. Brunner
• S.A.F.E.
• Swiss Agency for Efficient Energy Use
• Zurich/Switzerland
• www.energy-efficiency.ch
• www.energybox.ch

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Survey by Swiss Utilities

• First Survey 1996
• 1500 households
• Electricity consumption kWh/a from metering
• Second Survey 2004/05
• 1500 households
• Electricity consumption kWh/a from metering
• Questionnaire
• Equipment
• Some behavior
• Results Problems
• Only aggregated data published (privacy)
• Calculations for disaggregated consumption
  (lighting, cooking, etc.)
• Problems with typology of equipment (electric
  heating, hot water, etc.)

3
Energybox

• Last release 2005
• equipment (number, age)
• behavior
• complete consumption calculated/metered
• proposition for improvement
• Statistical analysis of survey 1500 in 2006
• New release 2007
• total consumption
• focus on individual fields of energy consumption
• statistical analysis off survey 20000 in 2007
  (8000 complete/plausible)
• Bias
• Discussion with Utility survey
• Comparison with national household average

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Questions
User habits
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Total Electric Consumption ?
yes/no electric heating 7500 kWh/a
General uses outside apartment auxiliary
heating, lighting for stairs, corridors, outdoors
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What almost everybody has 3300 kWh/a Lighting,
refrigerator/freezer, washing/drying,
cooking/baking/dish washing, telephone, TV,
audio, settop box, home office, games, AC/DC
trafo charger stand by, etc.
yes/no electric hot water 3600 kWh/a
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general use
yes/no electric cooking 350 kWh/a
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What few people have Aquarium, sauna
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Problem Nr. 1 Bias of Survey and Monitoring
Results

• Theory of the clean survey
• Random selection
• Representative panel
• No other goals (like energy efficiency)
• Reality
• Gifts to clients (money, electricity, gadgets)
• Panels (used regularly)
• People with internet access
• People who give you access to apartment
• People who tolerate metering equipment in their
  apartment
• People you know (your friends and colleagues)
• People who spend 30 60 minutes on a
  questionnaire
• Households near your office
• Advertise in environmental magazines

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Problem Nr. 2 Calculation vs. Metering

• Market survey for individual categories
• Historical data for existing equipment 1985 -
  2005
• Calibration with known households
• Plausibility checks
• Reported metered data client does not know how
  to read it properly
• kWh/money (fixed elements, kW peak, kVAr, taxes,
  etc.
• Period (year, 3 or 4 months)
• Acconto/annual accounting
• Elements included/not included (washing..)

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Problem Nr. 3 New Products Habits

• Entertainment home worker
• Cameras, photo printers
• Power drills
• Lawn mower, blowers
• Toys
• Kids toys
• Grown up toys
• Communication
• Wireless phone
• Satellite dish
• Fax (dying)
• Safety
• External lights
• Habits
• Eating in restaurants
• Holidays and weekend
• Home office
• Less regular family households

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Who wants to use Energybox?

• What for?
• The questionnaire
• The Excel background calculation (Swiss
  calibration)
• The graphs
• The navigation (user interface)
• The database (individual data storage)
• The energy efficiency improvement
  (www.topten.info)

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