Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 54, Issue 5-6, Pages 1055-1063Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2010.11.025
Keywords
Heat transfer; Mass transfer; Hollow fiber membrane module; Humidification
Categories
Funding
- Natural Science Foundation of China [51076047]
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Hollow fiber membrane based air humidification offers great advantages over the traditional methods because the liquid water droplets are prevented from mixing with the process air, while water vapor can permeate through the membranes effectively. The novelty in this research is that the coupled heat and moisture transport in a hollow fiber membrane module for air humidification is investigated, both numerically and experimentally. The air stream and the water stream flow in a counter flow arrangement. It is found that the membranes play a key role in humidification performances. For sensible heat transfer, both the liquid side and the membrane side resistance can be neglected, while the total heat transfer coefficients are determined by the air side heat transfer coefficients. In contrast, in mass transfer, only the liquid side resistance can be neglected, while the total mass transfer coefficients are co-determined by membrane properties and the air side convective mass transfer coefficients. (C) 2010 Elsevier Ltd. All rights reserved.
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