Refrigerant R-134a enters a steady-flow turbine at 800 kPa, 80?C, and 60 m/s. Exit conditions are 0.60 bar, -10oC, and 120 m/s. The inlet area is 27.5 cm2 and the power developed is 280 kW. Determine
(a) the mass flow rate and
(b) the heat transferred through the turbine casing.