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Question 3 A small oil fired steam power plant in a remote location has a nominal installed capacity of 15 MW plus the sum of the last two digits of your student ID number divided by two (2). For example, if the last two digits of your student ID number are 46, then the nominal installed capacity would be [15+ (4 +6)/2] MW, i.e. 20 MW. The plant load factor is 75 % and the maximum demand is 80%. The overall thermal efficiency of the power plant is 37%. The specific enthalpy of the steam leaving the boiler and fed into the turbine is 3600 kJ/kg. The specific enthalpy of the steam leaving the turbine is 2350 kJ/kg. The specific enthalpy of feed water to the boiler is 225 kJ/kg. The calorific value of the fuel oil used is 45 MJ/kg. One (1) kg of fuel oil produce 3.2 kg of carbon di oxide (CO2). Since the maximum demand is growing and has reached 80%, It is proposed to supplement the oil fired power plant with wind generators of installed capacity 10 MW. The wind generators are to be installed on a flat open space adjacent to the existing steam power plant. The wind data obtained from the proposed site reveals the density of air is 1.29 kg/m3 and the average wind speed is 7.2 m/s. (a) Determine the amount of coal required annually for the operation of the steam power plant. (b) Calculate the thermal efficiency of the steam turbine in the steam power plant. (c) Determine the number of wind generators required, if the rotor diameter is 80 m and coefficient of performance Cp is 0.49. (d) Sketch the proposed layout for the wind turbines and determine area required. (25 marks) Question 3 A small oil fired steam power plant in a remote location has a nominal installed capacity of 15 MW plus the sum of the last two digits of your student ID number divided by two (2). For example, if the last two digits of your student ID number are 46, then the nominal installed capacity would be [15+ (4 +6)/2] MW, i.e. 20 MW. The plant load factor is 75 % and the maximum demand is 80%. The overall thermal efficiency of the power plant is 37%. The specific enthalpy of the steam leaving the boiler and fed into the turbine is 3600 kJ/kg. The specific enthalpy of the steam leaving the turbine is 2350 kJ/kg. The specific enthalpy of feed water to the boiler is 225 kJ/kg. The calorific value of the fuel oil used is 45 MJ/kg. One (1) kg of fuel oil produce 3.2 kg of carbon di oxide (CO2). Since the maximum demand is growing and has reached 80%, It is proposed to supplement the oil fired power plant with wind generators of installed capacity 10 MW. The wind generators are to be installed on a flat open space adjacent to the existing steam power plant. The wind data obtained from the proposed site reveals the density of air is 1.29 kg/m3 and the average wind speed is 7.2 m/s. (a) Determine the amount of coal required annually for the operation of the steam power plant. (b) Calculate the thermal efficiency of the steam turbine in the steam power plant. (c) Determine the number of wind generators required, if the rotor diameter is 80 m and coefficient of performance Cp is 0.49. (d) Sketch the proposed layout for the wind turbines and determine area required. (25 marks)