Modeling of ultrasonic enhancement on membrane distillation

Document Type

Article

Publication Date

8-15-2000

Abstract

Ultrasonic technology is successfully applied to enhance the permeate flux of membrane distillation. In this study, two major mechanisms of ultrasonic enhancement on membrane distillation, ultrasonic cavitation and acoustic streaming, are formulated in an analytical modeling. Ultrasonic induced membrane vibration, acoustic energy dissipation in viscous fluid, and membrane absorption and transmission of acoustic energy are also included in the modeling approach. Based on this model, effects of ultrasonic intensity, ultrasonic frequency, solution temperature and excited membrane area on permeate flux of membrane distillation are theoretically analyzed. It is found that the enhancement ratio can be improved by increasing ultrasonic intensity, decreasing ultrasonic frequency or decreasing the solution temperature. The current study also demonstrates that an enhancement up to 200% can be reached with an ultrasonic intensity from 0 to 5W/cm2. Copyright (C) 2000 Elsevier Science B.V.

Identifier

0034664180 (Scopus)

Publication Title

Journal of Membrane Science

External Full Text Location

https://doi.org/10.1016/S0376-7388(00)00426-9

ISSN

03767388

First Page

31

Last Page

41

Issue

1

Volume

176

Grant

4-21990

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