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For the http://www.appropedia.org/Green_Building_Pre-Apprenticeship_Program program.

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- 1. Lonny Grafman, Environmental Resources Engineering<br />
- 2. Basic Units<br />
- 3. Exercise<br />In 30 minutes, as a group, bring back a photo or video of:<br />
- 4. Energy Unit Definitions<br />http://fti.neep.wisc.edu/neep602/FALL97/LEC3/IMAGES/Table1Definitions.gif<br />
- 5. Energy Unit Definitions (a few more…)<br />http://fti.neep.wisc.edu/neep602/FALL97/LEC3/IMAGES/Table1Definitions.gif<br />
- 6. A BTU?<br />
- 7. Energy Conversion Factors (a few examples)<br />
- 8. A cliff bar?<br />= 252 Calories <br />= 252 kilocalories <br />= 1000 BTUs (1 BTU = 252 cal)<br />= 1000 <br />
- 9. Watts the deal?<br />http://www.appropedia.org/Power_and_energy_basics<br />
- 10. Some Models are Simple (e.g. estimate of gasoline used when driving)<br />Using models: Let’s say that you are planning to drive 1,000 miles in a car that typically gets 25 mpg. How much should you plan to spend on gas on the trip?<br />Source: Koomey, 2001<br />
- 11. Some Models are Simple (e.g. estimate of gasoline used when driving)<br />Refining the model: what if the 1,000 mile trip consists of 90% highway driving and 10% city driving, and your car actually gets 30 mpg highway and 22 mpg city? How much should you plan to spend now and how does this differ from the previous result?<br />Source: Koomey, 2001<br />
- 12. Back-of-the-Envelope Estimates(a very powerful tool)<br />How many gallons gasoline are used on average by light duty vehicles (passenger cars, trucks, and SUVs) in the USA each day?<br />
- 13. Unit conversions:<br />Mundane, but critically important for energy analysis<br />Practice makes perfect (but don’t spend all your time memorizing conversion factors)<br />Simple mathematical models and “back of the envelope” calculations<br />Most energy problems have a quantitative dimension (though numbers are rarely the whole story)<br />
- 14. Orders of Magnitude (prefixes)<br />See http://www.appropedia.org/Powers_of_10 for more.<br />
- 15. Energy Unit Definitions<br />http://fti.neep.wisc.edu/neep602/FALL97/LEC3/IMAGES/Table1Definitions.gif<br />
- 16. a Joule is the<br />work done to produce one watt continuously for one second<br />kinetic energy of a 2 kg mass moving at 1 m/s. (given by E = ½mv²)<br />potential energy of a 1 kg mass 1 m high in a gravitational field of 1 m/s². Earth's gravity is 9.81 m/s² at sea level, so 1 kg at 1 m has a potential energy of 9.81 joules.<br />energy required to lift a small apple one meter straight up.<br />amount of heat energy that a quiet person generates every hundredth of a second.<br />energy required to heat one gram of dry, cool air by 1 degree Celsius.<br />

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