QUESTION 1 (20 MARKS) CONFIDENTIAL With a mass flow rate of 4.47 kg/s, the refrigerant R-134a...

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QUESTION 1 (20 MARKS) CONFIDENTIAL With a mass flow rate of 4.47 kg/s, the refrigerant R-134a enters a non-adiabatic nozzle (inlet diameter =0.38 m and unknown outlet diameter) at 120°C and 380 kPa. Due to some heat loss to the surrounding and the pressure drop across the nozzle, the outlet temperature, pressure, and quality of R-134a are given as -18°C, 144.69 kPa, and 0.71, respectively. T1 = 120°C P = 380 kPa = -18°C T2 P2 =144.69 kPa %3D R- 134a → %3D X2 = 0.71 (a) Determine the phase and properties (specific volume, internal energy, and enthalpy) of the R-134a at the inlet of nozzle. (5 Marks) (a) Determine the phase and properties (specific volume, internal energy, and enthalpy) of the R-134a at the inlet of nozzle. (5 Marks) (b) Determine the phase and properties (specific volume, internal energy, and enthalpy) of the R-134a at the outlet of nozzle. (5 Marks) (c) Calculate the inlet velocity and the outlet diameter if the outlet velocity equals to 26.37 times the inlet velocity. (4 Marks) (d) Calculate the rate of heat loss from the nozzle. (6 Marks) QUESTION 1 (20 MARKS) CONFIDENTIAL With a mass flow rate of 4.47 kg/s, the refrigerant R-134a enters a non-adiabatic nozzle (inlet diameter =0.38 m and unknown outlet diameter) at 120°C and 380 kPa. Due to some heat loss to the surrounding and the pressure drop across the nozzle, the outlet temperature, pressure, and quality of R-134a are given as -18°C, 144.69 kPa, and 0.71, respectively. T1 = 120°C P = 380 kPa = -18°C T2 P2 =144.69 kPa %3D R- 134a → %3D X2 = 0.71 (a) Determine the phase and properties (specific volume, internal energy, and enthalpy) of the R-134a at the inlet of nozzle. (5 Marks) (a) Determine the phase and properties (specific volume, internal energy, and enthalpy) of the R-134a at the inlet of nozzle. (5 Marks) (b) Determine the phase and properties (specific volume, internal energy, and enthalpy) of the R-134a at the outlet of nozzle. (5 Marks) (c) Calculate the inlet velocity and the outlet diameter if the outlet velocity equals to 26.37 times the inlet velocity. (4 Marks) (d) Calculate the rate of heat loss from the nozzle. (6 Marks)