Theoretical and experimental studies on air gap membrane distillation |
| |
Authors: | G. L. Liu C. Zhu C. S. Cheung C. W. Leung |
| |
Affiliation: | (1) Department of Mechanical Engineering Hong Kong Polytechnic University Hung Hom, Kowloon, Hong Kong, HK |
| |
Abstract: | Air gap membrane distillation (AGMD) is an innovative membrane separation technique for pure water extraction from aqueous solutions. In this study, both theoretical and experimental investigations are carried out on AGMD of different aqueous solutions, namely, tap water, salted water, dyed solutions, acid solutions, and alkali solutions. A simple mechanistic model of heat and mass transfer associated with AGMD is developed. Simple relationships of permeate flux, total heating or cooling load and thermal efficiency of AGMD with respect to the membrane distillation temperature difference are obtained. Effects of solution concentration and the width of the air gap in AGMD are analyzed. In the experimental study, the experiments were conducted using 1m PTFE membrane with a membrane distillation temperature difference up to 55∘C. The AGMD system yields a permeate flux of pure water of up to 28kg/m2h. Direct comparison of the experimental results with the proposed modeling predictions shows a fairly good match. Received on 19 May 1998 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|