Electric Power Consumption and Generation

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Electric Power Consumption and Generation

• EES 306

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US Energy Consumption 100 QBtu
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30 of US Energy ? Transportation
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40 of US Energy ? Electricity
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Electricity End Use
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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.
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Electric Energy Cost
We pay for the electric energy that we consume.
We dont pay for power. So, we pay for kWh. The
cost of electric energy in CT is about 20 cents
per kWh
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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
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Electricity Generation
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Electric Power Plant
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Fuel
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Coal-Burning Power PlantBridgeport Harbor
Generating Station
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Coal Mine
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Coal Train
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Coal Pile
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Coal-Fired Boiler
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Steam Turbine
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Electric Generator
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Electric Generator
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Plant Output
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AC Power
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Voltage and Current
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Electric Grid
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Grid Transmission Distribution
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High Voltage Transmission
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Power Substation
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Power Pole
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Kilowatt-Hour Meter

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End Use

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Issue 1 - Efficiency
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Efficiency
Electric Power
Out Efficiency -----------------------------
Thermal Power In So, if a
power plant releases thermal energy (by burning
coal) at the rate of 1,500 MW and produces 500 MW
of electric power, then
500 MW Efficiency ----------------- 1/3
33 1500 MW
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Issue 2 Air Pollution
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Cap and Trade

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Issue 3 Global Warming
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Carbon Capture and Storage
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Conservation