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To “Kill-a-watt”By: M
How much energy do we consume?
Project Summary
• In order to save energy, we must know how much energy we are using?
• My project used two approaches: – Actual measurements using a power meter– Using the PSE&G electricity usage calculator
• In the end, I will share some tips to save energy that I learned during my research.
What is a Watt?
• A watt is a unit of power, named after engineer James Watt, which measures the rate of energy transfer.
• A watt, in electrical terms, is the rate which work is done when one ampere (A) of current flows through one volt (V).
• Formula: W= A*v
A Power Meter Buster• The Power Meter Buster is a device that
measures the amount of watts that any plug-in electrical device uses.
• On the screen, it displays the amount of time it has been measuring, the total wattage, and the cost.
Methodology
• In order to get the information, I would plug in the meter, then plug any device into it.
• It would then calculate the energy consumption for me.
• After that, I record my findings on a separate sheet and determine the amount of energy it uses in an hour.
• I have made a chart to show my findings.
Actual Measurement Used By Power Meter
Appliance Watts/hour $/hourGE Spacemaker Microwave 950W $0.18Window Air Conditioner 600W $0.12Rice Cooker 600W $0.12Dehumidifier 400W $0.09Proctor Cilex Toaster Oven 300W $0.06Halogen Lamp 300W $0.06TV 150W $0.03Computer (charging) 60W $0.02Fan 51W $0.01iPad Charger 15W $0.01
Electricity cost (per kWh) = $0.19
PSE&G Electrical CalculatorAppliance Watt Hours Monthly Cost35" LED TV 110 5 $3.0545" Plasma TV 400 1 $2.42Dish Washer 1200 1 $7.47Refridgerator 841 12 $19.24Dehumidifier 750 12 $52.22Electric Water Heater 4500 1.6 $41.62Computer 300 4 $7.28
Total 8101 $133.20
Sample key appliances
Appliance requiring different methods
• Microwave: Since my microwave is built in to the wall, I searched the brand and used that information to fill the chart.
• Air Conditioner: My central air conditioner doesn’t use a three-prong plug. Instead, I went to a friend’s house and ask his parents’ if I can measure their conditioner’s wattage.
Tips to Save Electrical Energy
• When a charged computer is off, unplug the device, so that an electrical leak will not occur.
• Refrain from keeping a fan, lights, or TV on in a room you are not in.
• Once a phone or tablet is done charging, unplug immediately.
• Use CFL or LED bulbs when old light bulbs burn out.
Thanks For Watching