Section: Thermodynamics | Type: NAT | Marks: 2
A stream of superheated steam (2 MPa, 300 °C) mixes with another stream of superheated steam (2 MPa, 400 °C) through a steady-state adiabatic process. The flow rates of the streams are 3 kg/min and 2 kg/min, respectively. This mixture then expands in an adiabatic nozzle to a saturated mixture with quality of 0.77 and 1 kPa. Neglect the velocity at the nozzle entrance and the change in potential energies. The velocity at the nozzle exit (in m/s) is ___________ (rounded off to two decimal places). Use the following data: At 2 MPa, 300 °C: Specific enthalpy of superheated steam = 3024.2 kJ/kg At 2 MPa, 400 °C: Specific enthalpy of superheated steam = 3248.4 kJ/kg At 1 kPa: Specific enthalpy of saturated water = 29.3 kJ/kg At 1 kPa: Specific enthalpy of saturated vapour = 2513.7 kJ/kg
Answer: 1515 to 1545