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Question 1 = Solar radiation is incident on a flat-plate collector at a rate of 880 W/m2. The product of the transmissivity of glazing and the absorptivity of absorber plate is 0.82. The collector has a surface area of 33 m2. This collector supplies hot water to a facility at a rate of 6.3 L/min. Cold water enters the collector at 18°C. If the efficiency of this collector is 70 percent, determine the temperature of hot water provided by the collector. (p = 4.18 kJ/kg. °C). [8] Question 2 A wind turbine with a blade diameter of 50 m is to be installed in a location where average wind velocity is 7.5 m/s. The average temperature and pressure of ambient air in this location are 23°C and 96 kPa, respectively. Determine the wind power potential. (R = 0.287 kJ/kg.K). [6] Question 3 Wind is blowing through a turbine at a velocity of 9 m/s. The turbine blade diameter is 35 m. The air is at 95 kPa and 20°C. If the power output from the turbine is 115 kW, determine the efficiency of the turbine. (R = 0.287 kJ/kg.K). [6]