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Prediction of mass transfer coefficients in closed channels estimate the gas phase mass transfer coefficients for water vapor evaporating into air at 2 atm and 25°C and a mass flow rate of

Prediction of mass transfer coefficients in closed channels, estimate the gas-phase mass transfer coefficients for water vapor evaporating into air at 2 atm and 25°C, and a mass flow rate of 1570 lbm/hr, in the systems that follow. Take DAB = 0.130 cm2/s.
(a) A 6-in. i.d. vertical pipe with a falling film of water on the wall. Use the following correlation1 for gases in a wetted-wall column: Shloc = 0.023 Re0.83Sc0.44 (Re > 2000)
(b) A 6-in.-diameter packed bed of water-saturated spheres, with a = 100ft–1.
 

Jul 25 2020 View more View Less

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