QUESTION 1 An air compressor is run by a direct-coupled steam turbine that is also driving...

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QUESTION 1 An air compressor is run by a direct-coupled steam turbine that is also driving a generator as shown in Figure 2. Both the compressor and turbine are well-insulated. Steam enters the turbine at 12.5 MPa and 500 C at a rate of 25 kg/s and leaves at 10 kPa and a quality of 0.92. Air enters the compressor at 98 kPa and 22 C at a rate of 10 kg/s and leaves at 1 MPa and 347 C. Air compressor Steam turbine i. ii. Figure 2 Calculate the related compressor and turbine power, kW Write the energy balance for the compressor and turbine iii. Determine the net power delivered to the generator by the turbine, kW iv. If the turbine is not well-insulated, explain the change in the turbine power calculated in part (ii). (20 marks) (5 marks) QUESTION 1 An air compressor is run by a direct-coupled steam turbine that is also driving a generator as shown in Figure 2. Both the compressor and turbine are well-insulated. Steam enters the turbine at 12.5 MPa and 500 C at a rate of 25 kg/s and leaves at 10 kPa and a quality of 0.92. Air enters the compressor at 98 kPa and 22 C at a rate of 10 kg/s and leaves at 1 MPa and 347 C. Air compressor Steam turbine i. ii. Figure 2 Calculate the related compressor and turbine power, kW Write the energy balance for the compressor and turbine iii. Determine the net power delivered to the generator by the turbine, kW iv. If the turbine is not well-insulated, explain the change in the turbine power calculated in part (ii). (20 marks) (5 marks)