Engineering, 06.03.2020 19:53 marcos86
An investor is to install a total of 40 identical wind turbines in a location with an average wind speed of 7.2 m/s. The blade diameter of each turbine is 18 m and the average overall wind turbine 5-28 efficiency is 33 percent. The turbines are expected to operate under these average conditions 6000 h per year and the electricity is to be sold to local utility at a price of $0.075/kWh. If the total cost of this installation is $1,200,000, determine how long it will take for these turbines to pay for themselves. Take the density of air to be 1.18 kg/m
Answers: 3
![W_{el} = (0.33)\cdot (40) \cdot \frac{1}{2} \cdot (1.18\,\frac{kg}{m^{3}})\cdot [\frac{\pi}{4}\cdot (18\,m)^{2}}] \cdot (7.2\,\frac{m}{s} )^{2}\cdot (6000\,h)\cdot (\frac{3600\,s}{1\,h} )](/tpl/images/0535/8917/51355.png)
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