Refrigerant 134a enters a turbine at 1200 kPa and 97 C. Refrigerant 134a leaves the turbine...

 

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Refrigerant 134a enters a turbine at 1200 kPa and 97 C. Refrigerant 134a leaves the turbine as a saturated vapor at 30 C and a mass flow rate of 4.5 kg/s. The rate of work produced by the turbine is measured to be 128.5 kW. If the elevation change and kinetic energy change between the turbine inlet and exit are negligible, then: (1) Determine the specific enthalpy of R-134a at the inlet (kJ/kg). (2) Determine the rate of heat transfer associated with this process (kW). (3) Indicate the direction of the heat transfer. 128.5 kW saturated vapor 30 C 4.5 kg/s R-134a 1200 kPa 97 C Refrigerant 134a enters a turbine at 1200 kPa and 97 C. Refrigerant 134a leaves the turbine as a saturated vapor at 30 C and a mass flow rate of 4.5 kg/s. The rate of work produced by the turbine is measured to be 128.5 kW. If the elevation change and kinetic energy change between the turbine inlet and exit are negligible, then: (1) Determine the specific enthalpy of R-134a at the inlet (kJ/kg). (2) Determine the rate of heat transfer associated with this process (kW). (3) Indicate the direction of the heat transfer. 128.5 kW saturated vapor 30 C 4.5 kg/s R-134a 1200 kPa 97 C