Final Exam Cold air enters the mixing chamber at 85°C and 105 kPa at a rate of 0.55 m /s, while warm air enters at 487°C and 105 kPa and the exit temperature of air leaving the chamber is 376.3 K. What is the ratio of the mass flow rates of the cold to hot air streams (m/m,)"

calculate

ASEM 12/6/2015 Q1/ A stream of warm water is produced in a steady flow mixing process by combining 1.0 kg/s of cool water at 25 °C with 0.8 kg/s of hot water at 75 °C. During mixing, heat is lost to the surroundings at the rate of 30 kJ/s. What is the temperature of the warm water stream? Assume the specific heat of water constant at 4.18 kJ/kg.K.

Steam (H2O) enters a turbine at 35 m/s and specific enthalpy of 3500 kJ/kg. Thesteam leaves the turbine as a mixture of vapor and liquid having a velocity of 60m/s and a specific enthalpy of 2400 kJ/kg. If the flow through the turbine is steady,adiabatic, and changes in elevation are negligible, calculate the work output per unitmass (kJ/kg) for the turbine.