Performance evaluation of ePTFE and PVDF flat-sheet module direct contact membrane distillation
Journal
Water Science and Technology
Journal Volume
62
Journal Issue
2
Pages
347-352
Date Issued
2010
Author(s)
Abstract
This paper reports experiments using a flat-sheet module with 0.18 ? 0.45 £gm ePTFE (expanded polytetrafluoroethylene) and PVDF (polyvinylidene fluoride) membranes to show the effects of membrane properties, salt concentration and fluid hydrodynamics on the permeate flux and salt rejection of DCMD (direct contact membrane distillation). A theoretical prediction of the permeate flux was carried out, and was in close agreement with the experimental results. In addition, the energy integration of the process was also analyzed in order to evaluate module design to increase energy efficiency. According to the simulated results of the energy integration design, a combination of simultaneous cooling of the permeate stream and an additional heat exchanger to lower the temperature of the permeate stream not only enhances the MD flux, but also reduces energy consumption. ? IWA Publishing 2010.
Subjects
DCMD
Desalination
Energy integration design
ePTFE
Membrane distillation
PVDF
SDGs
Type
journal article