Investigation of moisture transfer effectiveness through a hydrophilic polymer membrane with a field and laboratory emission cell |
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| Affiliation: | 1. School of Power Engineering, Chongqing University, Chongqing, 400044, PR China;2. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing, 400044, PR China;1. Mines Douai, SAGE, F-59508 Douai, France;2. Université de Lille, F-59000 Lille, France;3. Université de Strasbourg/CNRS. Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR 7515, F-67087 Strasbourg, France;4. Université de Strasbourg/CNRS, Laboratoire Image, Ville, Environnement (LIVE), UMR 7362, F-67087 Strasbourg, France;5. Laboratoire des Sciences de l’Ingénieur pour l’Environnement - LASIE FRE 3474 CNRS - Université de La Rochelle, La Rochelle, France;6. Université de Lille 1, Laboratoire de Physico-chimie des Processus de Combustion et de l׳Atmosphère, F-59655 Villeneuve d׳Ascq, France;1. Department of Chemical and Biological Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA;2. Department of Mechanical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada;3. Department of Engineering Physics, McMaster University, Hamilton, Ontario L8S 4L7, Canada;4. Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada;1. SINTEF Energy Research, Kjolbjorn Hejes vei 1D, Trondheim, 7465, Norway;2. Department of Energy and Process Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway;3. Department of Mechanical Engineering, University of Saskatchewan, SK S7N5A9, Canada |
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| Abstract: | This research focuses studies of water permeation potential through a polymer membrane with the help of a standard field and laboratory emission cell. Special efforts are devoted to finding a correlation governing the relations between the number of transfer units (NTU) and the moisture exchange effectiveness. As a first step, moisture diffusivity in the hydrophilic polymer membrane is experimentally measured. In combination with mathematical modeling, the moisture concentration distributions in the cell, the water uptake gradients in the membrane, as well as the local vapor emission rate on membrane surface, are investigated. The results are that the emission rates show a non-uniform character and a polynomial equation governing the moisture exchange effectiveness and the dimensionless number of transfer units, could be used to inversely estimate the diffusivity of water vapor in hydrophilic membranes. The form and the value of constants in the equation are obtained. |
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