Recap from last time

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Recap from last time

• Environmental impacts hard to nail down
• Energy electricity a big deal!

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Energy Production Consumption in the United
States
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Energy Security?
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US Energy Production Consumption
100 Quadrillion BTU
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How many Big Macs is that?

• 6
• 43 trillion
• Thats a lot

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Day TwoEnergy the Environment
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Fuzzy Schedule for Today

• Energy Overview
• Now with 100 more Schoolhouse Rock!
• Bedroom Exercise (1000)
• Where does electricity come from?
• Field Trip (1115)
• Energy and Transportation
• Lunch (1230)
• Field trip debriefing
• Alternative Fuels
• Wrap-up (200)

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Energy Overview

• Imagine life without it
• Impacts the economy, our society and the
  environment
• Lots of green design and environmental engineers
  study it

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How do we measure it?

• Fundamental energy unit joule
• Also BTU, calorie
• Used over time joule per second, or watt
• Also horsepower
• Use a watt for 3600 seconds watt-hour
• Electricity measured (and billed) kilowatt-hour
  (kWh)
• 1000 watt-hours
• Light bulb uses 60 watts what would meter read
  after one day?
• 1.44 kWh (60 watt x 24 hours / 1000)

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Where do we get it?

• Fossil fuels
• Coal, natural gas, petroleum
• Petroleum
• Heating oil, gasoline, diesel, propane
• Renewable Sources
• Hydro, wind, solar, geothermal
• Nuclear
• Wood

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Where do we use it?

• Today well look at both transportation and
  electricity