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Theoretical modeling and simulation of AGMD and LGMD desalination processes using a composite membrane

Title
Theoretical modeling and simulation of AGMD and LGMD desalination processes using a composite membrane
Author
김우승
Keywords
Air-gap membrane distillation; Liquid-gap membrane distillation; Desalination; Heat and mass transfer; Composite membrane
Issue Date
2018-11
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MEMBRANE SCIENCE, v. 565, Page. 14-24
Abstract
Most previous studies of air- and liquid-gap membrane distillation (AGMD and LGMD) processes using a composite membrane have been focused on an experimental approach. In this paper, rigorous theoretical investigations of the AGMD and LGMD processes were performed with a flat sheet type module using a composite membrane comprised of a polytetrafluoroethylene (PTFE) active layer and a polypropylene (PP) support layer. The model predictions were verified by comparing with measured data, where good agreement between the prediction results and experimental data was obtained. It was observed that as the gap size increased the AGMD permeate flux decreased exponentially with increased diffusion resistance. On the other hand, the LGMD permeate flux decreased exponentially and then increased asymptotically after attaining a minimum at a certain liquid-gap size (5–7 mm). This phenomenon was due to the onset and enhancement of a natural convection, resulting in an improvement in heat and mass transfer in the liquid gap.
URI
https://www.sciencedirect.com/science/article/pii/S0376738818311104https://repository.hanyang.ac.kr/handle/20.500.11754/98793
ISSN
0376-7388
DOI
https://doi.org/10.1016/j.memsci.2018.08.006
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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