Energy efficiency of permeate gap and novel conductive gap membrane distillation
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PGCGMD_GOR_Analysis_DSPACE.pdf
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1.09 MB
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Author(s)
AlMarzooqi, Faisal A.
Arafat, Hassan A.
Swaminathan, Jaichander
Chung, Hyung Won
Warsinger, David Elan Martin
Lienhard, John H
Date Issued
December 2015
Journal
Journal of Membrane Science
Publisher
Elsevier
Citation
Swaminathan, Jaichander, Hyung Won Chung, David M. Warsinger, Faisal A. AlMarzooqi, Hassan A. Arafat, and John H. Lienhard V. “Energy Efficiency of Permeate Gap and Novel Conductive Gap Membrane Distillation.” Journal of Membrane Science 502 (March 2016): 171–178.
Version
Author's final manuscript
Abstract
This work presents numerical modeling results and flux experiments for a novel membrane distillation configuration called conductive gap membrane distillation (CGMD), as well as permeate gap membrane distillation (PGMD). CGMD has a conductive spacer in the gap between the membrane and condensing surface rather than more commonly used insulating materials. Flux measurements with two experimental systems are used to validate the numerical models for PGMD and CGMD. PGMD has 20% higher GOR (energy efficiency) than an air gap membrane distillation (AGMD) system of the same size, whereas CGMD can have two times higher GOR than even PGMD. Increasing gap effective thermal conductivity in CGMD has negligible benefits beyond View the MathML source under the conditions of this study. The direction of pure water flow in the gap has a significant influence on overall system energy efficiency, especially in the case of CGMD. Using a countercurrent configuration for the pure water flow in the gap relative to the cold stream leads to 40% higher GOR than flow cocurrent with the cold water stream.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Rohsenow Kendall Heat Transfer Laboratory (Massachusetts Institute of Technology)
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DOI of Published Version
https://doi.org/10.1016/j.memsci.2015.12.017
