Experimental and theoretical investigations on the influence of spacer on the DCMD process performance
- Authors
- 김영득; 이정길; 김우승; 최준석
- Issue Date
- Nov-2015
- Publisher
- 대한기계학회
- Keywords
- Direct Contact Membrane Distillation(DCMD); Spacer; Performance
- Citation
- 대한기계학회 창립 70주년 기념 학술대회, pp 815 - 820
- Pages
- 6
- Indexed
- OTHER
- Journal Title
- 대한기계학회 창립 70주년 기념 학술대회
- Start Page
- 815
- End Page
- 820
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/16543
- Abstract
- In this study, the experimental and theoretical studies have been carried out to achieve a more comprehensive and systematic understandings on the fundamentals in heat and mass transfer through a commercial flat sheet composite membrane that employs different types of spacers in bulk feed and permeate flow channels. The commercial composite membrane used is comprised of an active layer of polytetrafluoroethylene (PTFE) and a scrim-backing support layer of polypropylene (PP), and its performance has been tested in the DCMD process. The different types of polypropylene and nylon mesh spacers have been used at both sides of the composite membrane as a support and turbulence promoter. In DCMD process the water vapor passes through the dry membrane pores, driven by the vapor partial pressure difference imposed between the liquid–vapor interfaces. The mass transport through the composite membrane can be described by two individual transfer paths: (i) polytetrafluoroethylene active layer not covered by polypropylene scrim support layer at the permeate side (i.e., effective open area for diffusion) and (ii) composite polytetrafluoroethylene active and polypropylene support layers. The influence of the spacers on the permeate flux enhancement in DCMD process with a PTFE/PP composite membrane has been examined experimentally and theoretically. The heat transfer coefficients are evaluated and correlated with the spacer geometries, hydrodynamic angle and voidage.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MECHANICAL ENGINEERING > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.