8. Managing Home Energy Use – based on data and information
• Home energy bills
• Time-of-use tariffs
• Smart meters
• Web portals
• In-home displays
• Power meters
• Appliance electricity use
13. How much will you spend on energy and water
over the next 10 years?
$40,000? $100,000? More?
Forcey residence (2 to 3 people):
Water: $ ?,??? per year.
Gas: $ ?,??? per year.
Electricity: $ ?,??? per year.
Total: $ ?,??? per year.
Assuming 5% inflation = more than $??,???? over 10 years.
14. How much will you spend on energy and water
over the next 10 years?
$40,000? $100,000? More?
Forcey residence (2 to 3 people):
Water: $ 1,300 per year.
Gas: $ 1,000 per year.
Electricity: $ 1,000 per year. (1 kilowatt solar system)
Total: $ 3,300 per year.
Assuming 5% inflation = more than $40,000 over 10 years.
29. Electrical Appliances – electricity use in watts
Clothes dryer 4,600
Hot water heater garage 4,000
Oven 3,400
Grill 2,400
Iron 2,400
Dishwasher max 2,200
Kettle 2,200
Hair dryer 2,000
Panel Heater – electric radiant 2,000
Toaster 1,800
Microwave oven max 1,700
“ standby 0
Spa heating 1,700
“ jets pump 1,600
“ circ pump 100
Vacuum sweeper 1,400
30. Downlight calculation: LEDs vs Halogen
Assume:
• 10 downlights
• used 6 hours per day (average over a year)
• which can be replaced with LED’s and therefore save 40 watts per light
• electricity cost = 30 ¢ per kilowatt-hour (week/weekend average).
10 lights x 6 hours per day x
365 days per year x 40 watt savings per light x
30 ¢ per kilowatt-hour = potential savings of:
$ 260 per year.
$ 26 per light fitting.
31. 2nd fridge – Save by switching it off.
Assume:
• 150 watts average use (old inefficient fridge in the garage)
• electricity cost = 30 ¢ per kilowatt-hour (week/weekend average).
---------------------------------------------
150 watts continuously x
8,760 hours per year (continuous use) x
30 ¢ per kilowatt-hour =
electricity cost: $400 per year.
32. Clothes drier calculation
Assume:
• 4,600 watts
• Used 2 hours-per-week
• Electricity cost = 30 ¢ per kilowatt hour
--------------------------------
4,600 watts x
2 x 52 hours per year x
30 ¢ per kilowatt-hour =
electricity cost of: $140 per year.
33. Electric radiant heaters (oil column, panel, oil column, etc.)
Assume:
• 2,400 watts
• Used 10 hours-per-day for 5 months
• Electricity cost = 30 ¢ per kilowatt hour
2,400 watts x 1,500 hours per year x
30 ¢ per kilowatt-hour =
$1,080 per year.
