Refrigerant 134a enters an insulated diffuser as a saturated vapor at 120°F with a velocity of 1400 ft/s. The inlet area is 1.4 in?. At theexit, the pressure is 400 Ibf/in2 and the velocity is negligible. The diffuser operates at steady state and potential energy effects can beneglected.Determine the mass flow rate, in Ib/s, and the exit temperature, in °F.

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Answered: Refrigerant 134a enters an insulated…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Which of the following is incorrect about the overall energy balance and mechanical energy balance in fluid flow phenomena?A. The former only accounts the first law of thermodynamics while the latter includes the second.B. The former only accounts the work brought by changes in the volume while the latter includes the Δ(PV) work.C. The enthalpy of the system for both balance is the sum of the changes in the internal energy and the reversible work at constant pressure.D. The former is not often used to evaluate a system with changing pressure unlike the latter.
Refrigerant 134a enters a well-insulated nozzle at 200 lbf/in.2, 140°F, with a velocity of 120 ft/s and exits at 10 lbf/in.² with a velocity of 1500 ft/s. For steady-state operation, and neglecting potential energy effects, determine the temperature, in °F, and the quality of the refrigerant at the exit. T₂ = i 29.615 x2 = 78.516 % °F
Argon gas flows through a well-insulated nozzle at steady state. The temperature and velocity at the inlet are 590°R and 150 ft/s, respectively. At the exit, the temperature is 500°R and the pressure is 40 Ib;/in?. The area of the exit is 0.0085 ft2. Use the ideal gas model with k = 1.67, and neglect potential energy effects. Determine the velocity at the exit, in ft/s, and the mass flow rate, in Ib/s.
A mixing vessel initially contains 3,989.8 lb of liquid fluid. The vessel is fitted with two inlet pipes, one delivering hot fluid at a mass flow rate of 0.454 lb/sec and the other delivering cold fluid at a mass flow rate of 0.288 lb/sec. Fluid exits through a single pipe at a mass flow rate of 1.338 lb/ sec. Calculate the amount of fluid, in lb, in the tank after 16 minutes.
Air enters a diffuser operating at steady state at 540°R, 15 Ilbf/in.?, with a velocity of 600 ft/s, and exits with a velocity of 60 ft/s. The ratio of the exit area to the inlet area is 6. Assuming the ideal gas model for the air and ignoring heat transfer, determine the temperature, in °R, and pressure, in Ibf/in.?, at the exit.
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A steady state flow of saturated water vapor at 5 bar with a velocity of 14 m/s enters a horizontal pipe with a diameter of 15 cm. If steam exits the pipe at 4.5 bar with a quality of 94%, calculate the heat transfer for the process in kW. hint: No need to calculate the change in the kinetic energy, use velocity and pipe diameter in the calculation of the mass flow rate а. -63.3 b. -87.1 О с. -95.6 d. -106.8 e. -122.6 O f. -133.4 O g. -145.3
Refrigerant 134a enters an insulated diffuser as a saturated vapor at 80°F with a velocity of 1400 ft/s. The inlet area is 1.4 in². At the exit, the pressure is 400 lb/in² and the velocity is negligible. The diffuser operates at steady state and potential energy effects can be eglected. Determine the mass flow rate, in lb/s, and the exit temperature, in °F. Step 1 Your answer is correct. Determine the mass flow rate, in lb/s. m = 28.887 Hint Step 2 lb/s. Determine the exit temperature, in °F. T₂ = i OF Attempts: 1 of 4 used
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