Question

MIET 2480-Renewable Energy Systems-15 Jun 2019 Quiz 2: Wind Power Adeol Summanleknl Name: Student ID: 1. You have a wind site with average wind speed of 8.2 m/s over 1 year, how the average power density in the wind is calculated, given density of the wind as 1.225 kg/m3? a. (1.225) (8.23) -338 W/m2 b. The estimated value closest to the actual average power density is calculated knowing the wind speed frequency distribution fi for each wind speed vi measured every hour over 1 year=% 1.225vi f /8760 The estimated value closest to the actual average power density is calculated knowing the wind speed frequency distribution fi for each wind speed vi measured every hour over 1 year as = 1.225 vf d. None of the above C. 2. Which of the following wind turbine designs does provide the maximum coefficient of performance? Modern Horizontal Axis and three blades a. b. Modern Horizontal Axis and two blades Savonius rotor C. d. Darrieus rotor e. American multi-blade 3. What is the annual average power produced by a wind turbine with maximum power rated of 1500 kW and capacity factor of 43%? And what is the approximated annual average energy output during 1 year? a. 700 kW and 1226 MWh b. 700 kW and 2000 MWh 645 kW and 5650 MWh C. 1000 kW and 1226 MWh d. None of the above e. Compare the power output of a wind turbine when the temperature is 33°C and when the temperature is 5°C (using the same wind speed distribution). At the higher temperature, the power output will be:Show your calculations below. 4. a. 10% more b. 5% more c. About the same d. 5% less; e. 10% less

Answer 1

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