At 15 kWh
At 15 kWh, trading in a pre-1986 fridge for a new efficient one would save about $158 a year in electricity costs. And some older fridges are even worse than the average. One reader estimates her savings to be $238 per year for trading in her 1979 fridge for a 2004 model. Fridge should be 36-40F, and the freezer should be 0-5F (-17 to -10C). Fridges set 10 degrees lower than needed (or freezers set 5 degrees lower than needed) can increase energy use by as much as 20-25%. Personally, I set my own fridge to 56 because as a vegan I never store super-perishables like meat or dairy. A fridge will use anywhere from 100 to 400 watts depending on size, an average modern fridge will use 180 watts. Click calculate to find the energy consumption of a refrigerator using 180 Watts for 24 hours a day @ $0.10 per a kWh. Cost Per Hour: (For example: 30 minutes per a day is 0.5). If you are using an old fridge we highly recommend you upgrade to a more efficient modern model, advances in the past 15-20 years have reduced the energy use of refrigeration. Plug it into the meter for three days and at the end of the three days (before 99 hours have elapsed), note the kilowatt hours consumed and the time elapsed. Divide kwh by hours by 24 and you'll know exactly how much the unit consumes in a 24-hour period. Since a kwh typically costs about $0.10, multiply the result by 36.5 and you'll have a typical yearly operating cost. Source(s): http://www.green-energy-efficient-homes.... http://www.green-energy-efficient-homes.... Refrigerators sold today are much more efficient than most refrigerators sold ten years ago, because the minimum standards have risen. ENERGY STAR refrigerators today are about 20% more efficient than the minimum standard as it stands today. Electricity Usage. The amount of energy used by each appliance depends on how much power it draws when in operation and how much of the time it is used. The power usage is measured in watts and kilowatts (a kilowatt =1000 watts), and the amount of energy that it consumes in watt-hours or kilowatt hours (kWh). A single bar electric fire often uses electricity at the rate of one kilowatt (kW) per hour. So, in an hour an electric fire will use one kilowatt hour (kWh). One kilowatt hour is also referred to as a ‘unit’ of electricity. In 2010 this cost an average of around 13p. Annual cost to operate: The utility rate is 11 cents per kWh.4.68 kWh × $0.11/kWh = $0.51/year. Determining how much electricity your appliances and home electronics use can help you understand how much money you are spending to use them. Wattage: The wattage is on the label and is listed at 1500 W. 3. Daily energy consumption:(1,500 W × 1) ÷ 1,000 = 1.5 kWh 4. Annual energy consumption: The kettle is used almost every day of the year.1.5 kWh × 365 = 547.5 kWh 5. Annual cost: The utility rate is 11 cents per kWh.547.5 kWh × $0.11/kWh = $60.23/year II. A 1-year-old ENERGY STAR fridge probably wouldn't use more than 600 kwh/year. Vending machines, on the other hand, could use considerably more energy when you consider the fact that the company that pays for the vending machine isn't usually the company that is paying for the electricity. Refrigerators sold today are much more efficient than most refrigerators sold ten years ago, because the minimum standards have risen. ENERGY STAR refrigerators today are about 20% more efficient than the minimum standard as it stands today. Information on efficiency of appliances can be found in EnergyStar (New Zealand) and Energy Rating (Australia). Laundry. Drying Clothes: Potentially high energy use appliance. Main power draw is a 2000watt heating element but this is on for only around 75% of the time. The appliance running cost per day (or month) will then be the power use in kW x the hours per day (or month) x the cost per kWh. There are some websites which can assist you with these calculations (eg. www.consumer.org.nz and www.energywise.org.nz/calculator). Price (kWh): Enter the cost you are paying on average per a kilowatt hour, average price in North America is 10 cents. If you are using an old fridge we highly recommend you upgrade to a more efficient modern model, advances in the past 15-20 years have reduced the energy use of refrigeration. (For example: 30 minutes per a day is 0.5). If you are using an old fridge we highly recommend you upgrade to a more efficient modern model, advances in the past 15-20 years have reduced the energy use of refrigeration. 4.68 kWh × $0.11/kWh = $0.51/year. If you want more detailed data on your home's energy use (as well as the ability to measure the energy use of 240-volt appliances), you might consider installing a whole-house energy monitoring system. Wattage: The wattage is on the label and is listed at 1500 W. 3. Daily energy consumption:(1,500 W × 1) ÷ 1,000 = 1.5 kWh 4. Annual energy consumption: The kettle is used almost every day of the year.1.5 kWh × 365 = 547.5 kWh 5. Annual cost: The utility rate is 11 cents per kWh.547.5 kWh × $0.11/kWh = $60.23/year II.
http://michaelbluejay.com/electricity/refrigerators.html http://energyusecalculator.com/electricity_refrigerator.htm https://answers.yahoo.com/question/index?qid=20090316112533AAHsg3W http://www.t2c.org.uk/saving-energy/electricity-usage/ http://energy.gov/energysaver/estimating-appliance-and-home-electronic-energy-use https://answers.yahoo.com/question/index?qid=20090316112533AAHsg3W http://www.physics.otago.ac.nz/eman/hew/ehome/euappliances.html http://energyusecalculator.com/electricity_refrigerator.htm http://energy.gov/energysaver/estimating-appliance-and-home-electronic-energy-use
how many kwh does a fridge use nz