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thermodynamics Thermodynamics P5.31: - Steam at 3 MPa and 400°C enters an adiabatic nozle steadily with...
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...
Steam enters an adiabatic turbine steadily at 7 MPa, 500 °C, and 45 m/s, and leaves at 100 kPa and 75 m/s. If the power output of the turbine is 5 MW and the isentropic efficiency is 77 percent, determine: A. the mass flow rate of steam through the turbine, B. the temperature at the turbine exit, and C. the rate of entropy generation during this process.
Carbon dioxide enters an adiabatic nozzle steadily at 1 MPa and 500°C with a mass flow rate of 6000 kg/h and leaves at 100 kPa and 450 m/s. The inlet area of the nozzle is 40 cm2 Determine (a) the inlet velocity and (b) the exit temperature.
Nitrogen gas at 60 kPa and 7°C enters an adiabatic diffuser steadily with a velocity of 200 m/s and leaves at 85 kPa and 22°C. Determine (a) the exit velocity of the nitrogen and (b) the ratio of the inlet to exit area A1/A2. Why in this question we ignore the value of mass flow rate ?
Steam enters an adiabatic turbine steadily at 3 MPa and 450°C at a rate of 8 kg/s and exits at 0.2 MPa and 150*C. If the surrounding air is at 25°C and 100 kPa, determine: a. The specific flow exergy of steam at turbine entrance b. The specific flow exergy of steam at turbine exit c. The rate of flow exergy change in the process.
Steam with the mass flow rate of 0.75 kg/s enters an adiabatic turbine steadily at 19 MPa, 600°C and 150 m/s, and leaves at 150 kPa and 350 m/s. The isentropic efficiency of the turbine is 85%. Neglect potential energy. (I) Determine the exit temperature of the steam, and its quality (if saturated mixture) (ii) Calculate the actual power output of the turbine, in kW (iii) Illustrate a T-s diagram with respect to saturation lines for the isentropic process by clearly indicating all pressure, temperature,...
Steam enters an adiabatic nozzle at 400 °C and 800 kPa with a velocity of 16 m/s. It leaves the nozzle at 300 °C and 400 kPa. The inlet area of the nozzle is 800 cm2. Determine; a. The mass flow rate through the nozzle, in kg/s Ans. _kg/s b. The volume flow rate of the steam at the exit, in m3/s Ans._ _m3/s The velocity of the steam at the nozzle exit, in c. m/s Ans. m/s
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...
Nitrogen gas at 63 kPa and 7 C enters an adiabatic difuser steadily with a velocity of 280 m/s and leaves at 95 kPa and 28 C. The molar mass of nitrogen is M- 28 kg/kmol and the enthalpies are 8141 kJ/kmol at 7 C and 8723 kJ/kmol at 28 C. a. Write down the energy balance equation specific to this problem. b. Determine the exit velocity. c. The ratio of the inlet to exit area Ai/A2.
4-1-30 [WX] An adiabatic steam nozzle operates steadily under the following conditions. Inlet: superheated vapor, p1 = 1 MPa, T1 = 300°C, A1 78.54 cm2; Exit: saturated vapor, p2 = 100 kPa. Determine (a) the exit velocity (V2) in m/s, (b) the rate of entropy Solution] [Discuss] generation (Šgen) in kW/K. The mass flow rate (m is 1 kg/s.