A air of 500 0kPa (gage), 800.0C. 120.0m/s, 5.000kg/s is expanded by a turbine to 1...

 

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A air of 500 0kPa (gage), 800.0°C. 120.0m/s, 5.000kg/s is expanded by a turbine to 1 atm (101.325kPa). The air flows out from the turbine at 60m/sThe air is an ideal gas having 1.005 kJ/kgK specific heat (Cp. constant) 1.400 specific heat ratio(x). 0.287 kJ/kgk gas constant (R) Answer the following problems. (1) Assuming that the expansion process is a reversible adiabatic change, calculate the maximum outlet temperature (°C) of the turbine. (2) In case (1), calculate the output [kW] from the energy balance equation. (3) Calculate the area ratio (inlet/outlet) of this turbine when the outlet temperature is 400° C. (4) In case (3), the power is 2000kW Calculate the heat input or heat loss [kW] A air of 500 0kPa (gage), 800.0°C. 120.0m/s, 5.000kg/s is expanded by a turbine to 1 atm (101.325kPa). The air flows out from the turbine at 60m/sThe air is an ideal gas having 1.005 kJ/kgK specific heat (Cp. constant) 1.400 specific heat ratio(x). 0.287 kJ/kgk gas constant (R) Answer the following problems. (1) Assuming that the expansion process is a reversible adiabatic change, calculate the maximum outlet temperature (°C) of the turbine. (2) In case (1), calculate the output [kW] from the energy balance equation. (3) Calculate the area ratio (inlet/outlet) of this turbine when the outlet temperature is 400° C. (4) In case (3), the power is 2000kW Calculate the heat input or heat loss [kW]