5-29 The wind velocity in a location varies between 16 and 24 ft/s. A wind turbine with a blade span diameter of 185 ft is to be installed. The wind

turbine efficiency is 30 percent at a wind velocity is 16 m/s and 35 percent at 24 ft/s. It is estimated that wind blows at 16 ft/s for 3000 h per year and at 24 ft/s for 4000 h per year. The gearbox/generator efficiency is 93 percent. Determine the amount of electricity that can be produced by this turbine in kWh. Take the density of air to be 0.075 lbm/ft^3.Also, determine the blade tip speed in miles per hour (mph) when the blades rotate at 15 rpm.

Fig: 1