1. A small business uses 15,200 kWh monthly. To meet this need the business owner is considering the purchase of a micro wind system. The wind turbine has a cut-in wind speed of 5.0 mph, a cut-out wind speed of 55.0 mph, and a rated wind speed of 30.0 mph. The blade diameter is 6.50m. The air density is 1.23 kg/m3. The system has a coefficient of performance of 53.0% and a gearbox/generator efficiency of 95.0%. Assume the coefficient of performance of the turbine is constant from the cut-in wind speed and the rated wind speed. After local subsidies the installed cost of the system is $150,000 to paid over the 15.0 year life of the system at an interest rate 6%. The expected operations and maintenance costs are $0.010/ kWh. The average hourly wind speed data from the previous year are Hours Wind speed (mph) 50 > 60 90 50 - 60 650 40 - 50 1500 30-40 2100 20 - 30 2800 10 - 20 1570 0-10 a. What is the rated capacity of this wind turbine (kW)? b. Determine the performance curve for this wind tower system. Report the electrical power output of the wind tower system for wind speeds of 5 mph (kW). C. Determine the performance curve for this wind tower system. Report the electrical power output for a wind speed of 15 mph (kW). d. Determine the performance curve for this wind tower system. ort the electrical power output for a wind speed of 25 mph (kW). e. Determine the performance curve for this wind tower system. Report the electrical power output for a wind speed of 45 mph (kW). f. Determine the performance curve for this wind tower system. Report the electrical power output for a wind speed of 65 mph (kW). g. Based the previous year's wind speed data, what is the expected annual electrical energy output of the wind turbine (kWh/y)? h. What is the levelized cost of electricity for this system ($/kWh)? Ignore storage costs, assume the owners use all of the electrical energy generated by the wind turbine system. 1. A small business uses 15,200 kWh monthly. To meet this need the business owner is considering the purchase of a micro wind system. The wind turbine has a cut-in wind speed of 5.0 mph, a cut-out wind speed of 55.0 mph, and a rated wind speed of 30.0 mph. The blade diameter is 6.50m. The air density is 1.23 kg/m3. The system has a coefficient of performance of 53.0% and a gearbox/generator efficiency of 95.0%. Assume the coefficient of performance of the turbine is constant from the cut-in wind speed and the rated wind speed. After local subsidies the installed cost of the system is $150,000 to paid over the 15.0 year life of the system at an interest rate 6%. The expected operations and maintenance costs are $0.010/ kWh. The average hourly wind speed data from the previous year are Hours Wind speed (mph) 50 > 60 90 50 - 60 650 40 - 50 1500 30-40 2100 20 - 30 2800 10 - 20 1570 0-10 a. What is the rated capacity of this wind turbine (kW)? b. Determine the performance curve for this wind tower system. Report the electrical power output of the wind tower system for wind speeds of 5 mph (kW). C. Determine the performance curve for this wind tower system. Report the electrical power output for a wind speed of 15 mph (kW). d. Determine the performance curve for this wind tower system. ort the electrical power output for a wind speed of 25 mph (kW). e. Determine the performance curve for this wind tower system. Report the electrical power output for a wind speed of 45 mph (kW). f. Determine the performance curve for this wind tower system. Report the electrical power output for a wind speed of 65 mph (kW). g. Based the previous year's wind speed data, what is the expected annual electrical energy output of the wind turbine (kWh/y)? h. What is the levelized cost of electricity for this system ($/kWh)? Ignore storage costs, assume the owners use all of the electrical energy generated by the wind turbine system
