김우승
2019-02-11T04:26:39Z
2019-02-11T04:26:39Z
2018-11
JOURNAL OF MEMBRANE SCIENCE, v. 565, Page. 14-24
0376-7388
https://www.sciencedirect.com/science/article/pii/S0376738818311104
https://repository.hanyang.ac.kr/handle/20.500.11754/98793
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.
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20153010130460 and No. 20174010201310).
en_US
ELSEVIER SCIENCE BV
Air-gap membrane distillation
Liquid-gap membrane distillation
Desalination
Heat and mass transfer
Composite membrane
Theoretical modeling and simulation of AGMD and LGMD desalination processes using a composite membrane
Article
565
https://doi.org/10.1016/j.memsci.2018.08.006
14-24
JOURNAL OF MEMBRANE SCIENCE
Im, Baek-Gyu
Lee, Jung-Gil
Kim, Young-Deuk
Kim, Woo-Seung
2018002530
E
COLLEGE OF ENGINEERING SCIENCES[E]
DEPARTMENT OF MECHANICAL ENGINEERING
wskim