2. Warm water at 45°C is to be cooled to 35°C by counter-current contact with air in a tower packed with wood slats. The inlet air has a dry- bulb temperature of 31°C and a wet-bulb temperature of 22°C. The mass flow rate of water is 5000 kg/m².h and that of air is 1.2 times the minimum. The individual gas-phase mass transfer coefficient is ky'a = 6000 kg/m3.h.AY'. The volumetric water-side heat transfer coefficient is given by h a = 0.059 x L0.51 x Gs, in kcal/m³.h.K, where L and Gs are mass low rates of water and air (dry basis). Determine (a) the dry air flow rate to be used (bne height of packing
2. Warm water at 45°C is to be cooled to 35°C by counter-current contact with air in a tower packed with wood slats. The inlet air has a dry- bulb temperature of 31°C and a wet-bulb temperature of 22°C. The mass flow rate of water is 5000 kg/m².h and that of air is 1.2 times the minimum. The individual gas-phase mass transfer coefficient is ky'a = 6000 kg/m3.h.AY'. The volumetric water-side heat transfer coefficient is given by h a = 0.059 x L0.51 x Gs, in kcal/m³.h.K, where L and Gs are mass low rates of water and air (dry basis). Determine (a) the dry air flow rate to be used (bne height of packing
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:2. Warm water at 45°C is to be cooled to 35°C by
counter-current contact with air in a tower
packed with wood slats. The inlet air has a dry-
bulb temperature of 31°C and a wet-bulb
temperature of 22°C. The mass flow rate of water
is 5000 kg/m².h and that of air is 1.2 times the
minimum. The individual gas-phase mass
transfer coefficient is ky'a = 6000 kg/m3.h.AY'.
The volumetric water-side heat transfer
coefficient is given by h a = 0.059 x L0.51 x Gs, in
kcal/m³.h.K, where L and Gs are mass low rates
of water and air (dry basis).
Determine
(a) the dry air flow rate to be used
(bne height of packing
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