2 -Qg © 500°C 10 MPa 100m/s LOMPa, 120°C We 200 olyls 168°C) X = 0.922...
2 -Qg © 500°C 10 MPa 100m/s LOMPa, 120°C We 200 olyls 168°C) X = 0.922 (50 points). Combined boiler and turbine assembly: Water (H2O) flowing a the rate m = 200 kg is the working fluid for the boiler + turbine assembly shown in the figure. This flow enters the boiler at Pa = 10 MPa, T, = 120 °C. It leaves the boiler and enters the turbine at P2 = 10 MPa, T, = 500 °C with a...
1. Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C and leaves the tubes at 6 MPa and 450°C with a velocity of 80 m/s. Calculate the velocity of the water at the tube inlet and the inlet volume flow rate. [5-14] 2. Air enters a nozzle steadily at 50 psia, 140°F, and 150 ft/s and leaves at 14.7 psia and 900 ft/s. The heat loss from the nozzle is estimated to be 6.5...
Problem 2 The isentropic efficiency of a turbine is 90% when a steam at 500 °C 10 MPa , expands to 0.05 MPa saturated steam. The following conditions were calculated/estimated: P2s-30 KPa T- 90 °C T3-100 °C Are the above calculated/estimated conditions true? Calculate the true values. Problem 3.
Problem 2 The isentropic efficiency of a turbine is 90% when a steam at 500 °C 10 MPa , expands to 0.05 MPa saturated steam. The following conditions were calculated/estimated: P2s-30...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
4. An Ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is 95kPa and 20°C. If the maximum temperature in the cycle is not to exceed 2200K, determine a) the thermal efficiency and b) the mean effective pressure. Assume constant specific heats for air at room temperature. 5. An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio...