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EFFICIENT USE OF APPLIANCES
Carry out an audit of the electrical appliances used in your school. Note down the wattage of each appliance. (This is normally given on a data plate at the back of the appliance. Ask permission first).
Estimate the amount of hours each appliance is likely to be used for during an average school week and calculate the energy used in kWh and cost in pence. Use the following equation to help you:
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Power rating (watts) x time (in hours) x unit cost (7p)
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1000
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For example: A 500 watt hair dryer used for one hour would cost
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500 watts x 1 hour x 7p
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1000
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= 3.5p
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Use this sheet to help you too. An example has been given for guidance.
PRINT OUT WORK SHEET
Which appliances have you found to be wasting energy?
How much energy and money could be saved by using these appliances more efficiently?
Suggest ways you could improve their energy efficiency and report your findings to the whole school in an assembly.
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