1. A stream of water vapor enters a steam-handling unit at 0.5 MPa, 633 K at...

 

Transcribed Image Text:

1. A stream of water vapor enters a steam-handling unit at 0.5 MPa, 633 K at 30 m/s through a circular inlet I that is 50.46 cm wide in diameter. The fluid goes on to exit the unit through two identical outlets 2 and 3 (of the same diameter) at equivalent volumetric flowrates, 0.48 MPa pressure and 593 K temperature from each outlet, as shown below. Assuming 0°C = 273 K, and steady-state flow for the fluid, evaluate the mas flowrate at the following: (a) Inlet 1 (in kg/min) (2 marks) (b) Exits 2 (in kg/min) (2 marks) (c) Exits 3 (in kg/min) (2 marks) 0.48 MPa 633 K 593 K 0.5 MPa Water 0.48 MPa 593 K 30 m's 2. Air enters a diffuser of a high-altitude flight engine that is operating at steady-state at 265m/s, 0.18 bar, -57°C at the inlet. After an adiabatic flow through the diffuser, the fluid then exits at a -23°C temperature. Assuming 0°C = 273 K, an ideal air gas model, evaluate the velocity of the fluid at the exit of the diffuser (in m/s). (2 marks) 3. A well-insulated compressor operates at steady state on R134a which enters as a saturated vapor at 253 K and 72 kg/min mass flow-rate. The fluid exits compressor at 700 kPa, 343 K. Assuming 0°C = 273 K, and negligible kinetic and potential energy effects, evaluate the following: (a) The volumetric flow-rate at the inlet of the compressor (in m /s). (2 marks) (b) The volumetric flow-rate at the exit of the compressor (in m² /s). (2 marks) (c) Input power to the compressor (in kW). (3 marks) 1. A stream of water vapor enters a steam-handling unit at 0.5 MPa, 633 K at 30 m/s through a circular inlet I that is 50.46 cm wide in diameter. The fluid goes on to exit the unit through two identical outlets 2 and 3 (of the same diameter) at equivalent volumetric flowrates, 0.48 MPa pressure and 593 K temperature from each outlet, as shown below. Assuming 0°C = 273 K, and steady-state flow for the fluid, evaluate the mas flowrate at the following: (a) Inlet 1 (in kg/min) (2 marks) (b) Exits 2 (in kg/min) (2 marks) (c) Exits 3 (in kg/min) (2 marks) 0.48 MPa 633 K 593 K 0.5 MPa Water 0.48 MPa 593 K 30 m's 2. Air enters a diffuser of a high-altitude flight engine that is operating at steady-state at 265m/s, 0.18 bar, -57°C at the inlet. After an adiabatic flow through the diffuser, the fluid then exits at a -23°C temperature. Assuming 0°C = 273 K, an ideal air gas model, evaluate the velocity of the fluid at the exit of the diffuser (in m/s). (2 marks) 3. A well-insulated compressor operates at steady state on R134a which enters as a saturated vapor at 253 K and 72 kg/min mass flow-rate. The fluid exits compressor at 700 kPa, 343 K. Assuming 0°C = 273 K, and negligible kinetic and potential energy effects, evaluate the following: (a) The volumetric flow-rate at the inlet of the compressor (in m /s). (2 marks) (b) The volumetric flow-rate at the exit of the compressor (in m² /s). (2 marks) (c) Input power to the compressor (in kW). (3 marks)

Answer rating: 100% (QA)

o48mpa S93K 2 water 633K 3 0smpa O48mpa 30ms ... View the full answer