Alternative Fuels Quantitative Models

Alternative Fuels Quantitative Models - Alternative Fuels...

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Alternative Fuels Quantitative Models 9/25/13
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Ethanol: 1. Quantitative Formulation: The percentage of US gas consumption that can be replaced by ethanol from coal. = 100*(acres cropland)*(gallons ethanol per acre)*(gallon equivalent)(annual gas demand in gallons) 2. Assumptions All available cropland in the US would be converted to corn. No farmland used for raising animals would be converted to cropland. All corn grown will be harvested for ethanol. All crops planted will be harvested. The average amount of corn grown per acre will remain the same. No corn was lost during the converting process to ethanol. 3. Variables Used: Acres cropland: 100% of cropland available in the United States as converted to corn. No farmland used for other uses, such as animal raising, were used. Gallons of ethanol/acre: This is how many gallons of ethanol that can be made out of one acre of corn. This is assuming all farm is harvested and the average amount of corn grown per acre will not change. Gallon Equivalent: This is used to account for the amount of energy within one gallon of ethanol, as opposed to one gallon of gasoline. A gallon of ethanol contains less energy, so it will require more ethanol to get the same amount of energy as gasoline. Annual Gas demand: This is the amount of energy the U.S. requires per year. To go completely green, ethanol production would have to create at least this amount of energy. 4. Variable Values: Ethanol Value 1 Link Value 2 Link Chosen Value Acres Cropland 406424909 Link 3 406423000 Link 2 406423954 Gallon Ethanol/ Acre Corn 439 Link 5 478 Link 6 458
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Gallon Equivalent 0.78 Link 1 0.67 Link 8 0.73 Annual Gas Demand (Gallons) 1.34E+11 Link 10 1.38496E+11 Link 11 1.36248E+11 5. Model Results: Acres Cropland in U.S. Gallon Ethanol/ Acre Corn Gallon Equivalent Annual Gas Demand (gallons) % U.S.Demand Replaced 406423954 458 0.73 1.36248E+11 99.73261774 Although these results say it can nearly meet the U.S. energy demand, it is completely unrealistic. This model assumes that zero corn would be used for food and
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  • Spring '12
  • WilliamWild
  • Coal, Acre, Gasoline, Diesel fuel, Biodiesel

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