# Electric Energy Consumption - PowerPoint PPT Presentation

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Electric Energy Consumption. EES 205. US Energy Consumption: 100 QBtu. 30% of US Energy  Transportation. 40% of US Energy  Electricity. Electricity End Use. Power & Energy. 15 Watt bulb consumes 15 W of power continuously. 15 Watt bulb on for 1000 hours consumes

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## Electric EnergyConsumption

EES 205

### Power & Energy

15 Watt bulb consumes 15 W of power continuously.

15 Watt bulb on for 1000 hours consumes

15 W x 1000 hours = 15,000 Wh of energy.

15,000 Wh x 0.001 kWh/Wh = 15 kWh

kWh is the standard unit of electric energy.

### Electric Energy Cost

We don’t pay for power.

We pay for the electric energy that we consume.

So, we pay for kWh.

The cost of electric energy in CT is about 20 cents per kWh

### Electric Energy (\$)

The cost of running a 15 W bulb for 2000 hours:

Energy = 15 W x 2000 hours

= 30,000 Wh

= 30,000 Wh x 0.001 kWh/ Wh

= 30 kWh

Cost = 30 kWh x 20 cents/kWh

= \$6

### Kill A Watt Meter

This meter measures the energy (in kWh) consumed by appliances and electronics.