Engineering, 24.03.2021 22:50 NemoMay7990
A laboratory apparatus to measure the diffusion coefï¬cient of vaporâ gas mixtures consists of a vertical, small-diameter column containing the liquid phase that evaporates into the gas ï¬owing over the mouth of the column. The gas ï¬ow rate is sufï¬cient to maintain a negligible vapor concentration at the exit plane. The column is 150 mm high, and the pressure and temperature in the chamber are maintained at 0.25 atm and 320 K, respectively. For calibration purposes, you've been asked to calculate the expected evaporation rate (kg/h-m2) for a test with water and air under the foregoing conditions, using the known value of DAB for the vapor-air mixture.
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Engineering, 04.07.2019 18:10
Fluids at rest possess no flow energy. a)- true b)- false
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Engineering, 04.07.2019 18:10
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.
Answers: 1
Engineering, 04.07.2019 18:10
Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.
Answers: 2
Engineering, 04.07.2019 18:20
Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)
Answers: 3
A laboratory apparatus to measure the diffusion coefï¬cient of vaporâ gas mixtures consists of a ver...
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