Assignment-4- Gas Turbine (For all problems c, and y may be taken as 1.005 kJ/kg K and 14 for all compression processes, and as 115 kJ/kg K and 1.333 for all combustion and expansion processes...

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Assignment-4-
Gas Turbine
(For all problems c, and y may be taken as 1.005 kJ/kg K and 14 for all compression processes, and as 115 kJ/kg K and 1.333 for all combustion and expansion processes XXXXXXXXXXA gas turbine has an overall pressure ratio of 5/1 and a maxi-mum cycle temperature of 550°C. The turbine drives the compressor and an electric generator, the mechanical efficiency of the drive being 97%. The ambient temperature is 20°C and the isentropic efficiencies of the compressor and turbine are 0.8 and 0.83 respectively. Calcu-late the power output in kilowatts for an air flow of 15 kg/s. Calculate also the thermal efficiency and the work ratio. Neglect changes in kinetic energy, and the loss of pressure in the combustion chamber. (655 kW; 12%; XXXXXXXXXXIn a marine gas turbine unit a high-pressure stage turbine drives the compressor, and a low-pressure stage turbine drives the propeller through suitable gearing. The overall pressure ratio is 4/1, and the maximum temperature is 650°C. The isentropic efficiencies of the compressor, H.P. turbine, and L.P. turbine, are 0-8, 0-83, and 0.85 respectively, and the mechanical efficiency of both shafts is 98%. Calculate the pressure between turbine stages when the air intake conditions are 1.01 bar and 25°C. Calculate also the thermal effi-ciency and the shaft power when the mass flow is 60 kg/s. Neglect kinetic energy changes, and the pressure loss in combustion XXXXXXXXXXbar; 14-9%; 4560 kW) 123 For tke unit of problem 12.2, calculate the thermal efficiency obtainable when a heat exchanger is fitted. Assume a thermal ratio of XXXXXXXXXX%)

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Answered Same Day Dec 22, 2021

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David answered on Dec 22 2021

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Assignment-4- Gas Turbine (For all problems c, and y may be taken as 1.005 kJ/kg K and 14 for all compression processes, and as 115 kJ/kg K and 1.333 for all combustion and expansion processes...

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