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Unformatted text preview: Problem Set 1 IAP Part A: Sustainable Energy 10.391J/22.811J/ESD166J/11.371J/1.818J/3.564J/2.65J Due Wednesday January 17, 2007 Practice Problems for Class: 1. “Sustainable Transport”- If we stacked all the cars and trucks in the world on top of each other, how far would the stack reach into space? 2. “Sustainable hydro”- How much water flow does the Niagara Falls hydroelectric plant require? The falls are about 170 feet high. 3. “Do we have enough gas stations ” - How many gasoline stations are there in the United States? Homework Problems: 1. The average American uses about 8 tonnes of oil equivalent per year. Suppose that 1/4 of this is used as electricity. How many kWh/year would this person use? 2. Many Americans drive 15,000 miles or more per year. Let’s assume that this typical American uses a SUV or light truck that averages 11 miles per gallon. How many TOE does this correspond to? If the transportation sector is about 1/3 of total primary energy use, how would this rate of consumption compare with U.S. average? 3. Recently, Sierra magazine (Jan-Feb 2003 issue) published a short Ecological Footprint Quiz that was designed by The Redefining Progress Group , based in Oakland California, to help people determine their “ecological footprint” – or how much land is needed to support their individual lifestyle. Please use their format to estimate your personal ecological footprint in acres of land. Go to: http://www.earthday.net/footprint/info.asp to take the quiz. Print your quiz results page and submit with your homework. 4. Alternatively, the Carbon Fund Foundation has developed a “carbon footprint” quiz. Go to: http://www.carbonfund.org/site/pages/calculator to estimate your carbon footprint. Print out your quiz results page and submit with your homework. 5. Imagine a future lifestyle when you are at the height of your professional career. Re- estimate your eco-footprint based on how you would like to live in the future. Is it more or less than at present? By how much? 6. In addition to the on-line estimates you have just completed in Questions 3 and 4, a more detailed approach was developed by Ernst called the “Personal Energy Calculator” or PEC. The PEC calculation sheet and pages discussing the assumptions follow. Write two or three paragraphs evaluating the two footprint estimates you have made. Are they realistic? How would they compare to the PEC? What do they omit? How would you improve them? Cite as: Jefferson Tester, Elisabeth Drake, Frank Incropera, Michael Golay, course materials for 10.391J/1.818J/2.65J/ 11.371J/22.811J/ESD.166J Sustainable Energy, IAP 2007 to Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu), Massachusetts Institute of Technology. Downloaded on [DD Month YYYY]....
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This note was uploaded on 11/27/2011 for the course CHEMICAL E 10.302 taught by Professor Clarkcolton during the Fall '04 term at MIT.
- Fall '04