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EML4450_Exam1sol

EML4450_Exam1sol - EML 4450/5451 Energy Conversion Systems...

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EML 4450/5451 Energy Conversion Systems I Fall 2006 Examination #1 October 5, 2006 Closed Book Name: Solutions Time: 75 minutes SS#: 1. What is the most distinguishing sustainable energy feature as compared to the renewable energy? Renewable – essentially inexhaustible Sustainable – not substantially depleted by continuous use 2. Which are the two most important primary energy consumption sectors that produce the most CO 2 ? 3. What is the equilibrium temperature of the earth without the greenhouse effect? 255 K
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4. List the dominant greenhouse gases and their stable historical bounds in the appropriate units. 5. What are the dominant components of air pollution due to coal burning? Carbon dioxide Nitrogen oxides Sulfur dioxide Particulates
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6. What are the typical kWh costs of solar thermal, photovoltaic, biomass and large-scale wind turbine generated electricity? 7. Estimate the roof area required in Florida to generate 2.5 kW of electricity using 10 percent efficient photovoltaic modules.
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