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The payback period of the wind turbine is approximately '''59.63 years''' (Figure 7). Two equations were used to calculated the simple payback time::<ref>Cengel, Yunus A., and Micheal A. Boles. "Chapter 2: Energy, Energy Transfer, and General Energy Analysis." Thermodynamics: An Engineering Approach. Ed. Bill Stenquist. 5th ed. New York: McGraw-Hill, 2006. 51-109. Print.</ref> | The payback period of the wind turbine is approximately '''59.63 years''' (Figure 7). Two equations were used to calculated the simple payback time::<ref>Cengel, Yunus A., and Micheal A. Boles. "Chapter 2: Energy, Energy Transfer, and General Energy Analysis." Thermodynamics: An Engineering Approach. Ed. Bill Stenquist. 5th ed. New York: McGraw-Hill, 2006. 51-109. Print.</ref> | ||
;<math> | ;<math>Asv = Esv*c</math> | ||
:<math> | :<math>Asv = AnnualSavings</math> | ||
:<math> | :<math>Esv = Energy Savings/year</math> | ||
:<math>c = EnergyCost/unit</math> | :<math>c = EnergyCost/unit</math> | ||
;<math>P = I/ | ;<math>P = I/Asv</math> | ||
:<math>P = Payback Period (yrs)</math> | :<math>P = Payback Period (yrs)</math> | ||
:<math>I = System Initial Cost </math> | :<math>I = System Initial Cost </math> | ||
:<math> | :<math>Asv = Annual Energy Savings</math> | ||
=== Solar Panel === | === Solar Panel === | ||
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;<br><math>Esv=Ppv*S*n*365days/yr</math><br> | ;<br><math>Esv=Ppv*S*n*365days/yr</math><br> | ||
:<math> | :<math>Esv = Energy Savings/year</math> | ||
:<math> | :<math>Ppv = Rated Power Of Panel</math> | ||
:<math>S = FullSunHours/day</math> | :<math>S = FullSunHours/day</math> | ||
:<math>n = Efficiency</math> | :<math>n = Efficiency</math> | ||
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:<math>P = Payback Period (yrs)</math> | :<math>P = Payback Period (yrs)</math> | ||
:<math>I = System Initial Cost </math> | :<math>I = System Initial Cost </math> | ||
:<math> | :<math>Asv = Annual Energy Savings</math> | ||
== Wind Turbine Efficiency == | == Wind Turbine Efficiency == |