Transport analysis of an air gap membrane distillation (AGMD) process

Hawlader, Mohammad Nurul Alam and Bahar, Rubina and Kim, Choon Ng and Loh , Jian Wei Stanley (2012) Transport analysis of an air gap membrane distillation (AGMD) process. Desalination and Water Treatment, 42 (1-3). pp. 333-346. ISSN 1944-3994 (O), 1944-3986 (P)

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Abstract

Membrane distillation (MD) desalination is an emerging technology for fresh water production. This process incorporates phase change and transport of vapour through a hydrophobic membrane caused by vapour pressure across the membrane. The results from experimental studies and the one-dimensional transport analyses of the heat and mass transfer processes on an air gap MD (AGMD) unit are presented in this paper. The effects of different operating variables including feed and coolant temperatures, air gap, membrane support mesh size, feed concentration and feed and coolant fl ow rates were investigated. Mass transport through membrane, membrane support, air gap and condensation on the coolant plate has been analysed and expression for global mass transfer coeffi cient has been derived. The maximum distillate fl ux achieved was 5.11 kg m−2 h at a feed temperature of 60°C, coolant temperature of 10°C and an air gap of 2.5 mm. Feed temperature and air gap width were found to have signifi cant infl uence on the performance of the membranes.

Item Type:	Article (Journal)
Additional Information:	6548/26683
Uncontrolled Keywords:	Membrane distillation (MD), Global mass transfer coefficient, Air gap membrane distillation (AGMD), Hydrophobic membrane, Mass transport through membrane, Polyvinylidene fluoride (PVDF) membrane
Subjects:	T Technology > T Technology (General) > T173.2 Technological change
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof Mohammad Nurul Alam / M N A Hawlader
Date Deposited:	21 Nov 2012 07:28
Last Modified:	30 May 2014 18:48
URI:	http://irep.iium.edu.my/id/eprint/26683

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