Energy Use of Home Appliances, Page 2, Practice

What is the energy consumption of a refrigerator with a wattage rating of 700 Watts when it is operated for 24 hours a day?

Step 1

To solve, use the following formula:

Where:

Energy Consumption = Watt Hours (Wh) or KiloWatt Hours (kWh)

Power Consumption = Watts (W) or kW (KiloWatts)

Number of Hours Operated = Hours (h) For the example above:

Energy Consumption = 700 W x 24 h

Energy Consumption = 16800 W h

Step 2

To convert from Wh to kWh, remember that 1kWh = 1000 Wh

To solve, set up as a ratio and use linear algebra to solve for ?.