NDLI: Conjugate Computation of Transient Flow and Heat and Mass Transfer Between Humid Air and Desiccant Plates and Channels

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Hassan, S. Al-Sharqawi Lior, Noam
Copyright Year	2003
Abstract	This is a numerical study of dehumidification of humid air in laminar and turbulent flows (333 ≤ Re ≤ 6000) over desiccant-(silica gel)-lined finite flat plates and in channels. The problem is treated as conjugate flow, heat, and mass transfer, and solved by using a finite control volume method. The effects of the plate thickness (3 ≤ b ≤ 7 mm), the Reynolds number (333 ≤ Re ≤ 3333) and the turbulence intensity (1 ≤ TI ≤ 10%) on the dehumidification process were investigated. The results show that increasing the desiccant plate thickness decreases the heat and mass transfer coefficients by 25% and 22% at t = 10 s and x = 0.11 m, respectively, in comparison to a thin plate. Mass transport rates increase with Re, e.g., at t = 20 s, Wave increases by 50% as Re is increased 10-fold from 333 to 3333. Turbulent flow in channel desiccants increase the rate of dehumidification, e.g., an increase in Re from 600 (laminar) to 6000 (turbulent) results in an increase in Wave by 22% at t = 20 s. Also, increasing the turbulence intensity from 1% to 10% increase Wave by 7%.
Sponsorship	Heat Transfer Division
Starting Page	263
Ending Page	275
Page Count	13
File Format	PDF
ISBN	0791837181
DOI	10.1115/IMECE2003-41890
Volume Number	Heat Transfer, Volume 4
Conference Proceedings	ASME 2003 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2003-11-15
Publisher Place	Washington, DC, USA
Access Restriction	Subscribed
Subject Keyword	Heat Turbulence Flat plates Computation Dehumidification Reynolds number Plates (structures) Unsteady flow Flow (dynamics) Mass transfer
Content Type	Text
Resource Type	Article

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Conjugate computation of transient flow and heat and mass transfer between humid air and desiccant plates and channels, paper IMECE2003-41890

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