Recycle Effect on Double-Pass Parallel-Plate Mass Exchangers under Asymmetric Uniform Wall Concentrations

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Chii-Dong Ho¹  Jr-Wei Tu¹  Cheng-Yi Lin¹  Chi-Chin Kuo¹ 

[1] Department of Chemical and Materials Engineering, Tamkang University

关键词: Mass Transfer;    Recycle Effect;    Double-Pass Operation;    Conjugated Graetz Problems;    Asymmetric System;   

DOI  :  10.1252/jcej.13we126

来源: Maruzen Company Ltd

【 摘 要 】

References(16)The application of the recycle-effect concept to a double-pass parallel-plate mass exchanger under asymmetric uniform wall concentrations is proposed to enhance device performance. An analytical analysis of the Sherwood number and mass-transfer efficiency improvement is developed, and the theoretical predictions are represented graphically and compared with those in single-pass devices without inserting a permeable membrane. A considerable mass-transfer efficiency improvement is obtained by employing such a recyclic design with a suitable adjustment of the permeable-membrane location and recycle ratio, instead of using the single-pass device without external recycle. The results show that the recyclic double-pass operation can effectively improve the mass transfer efficiency, especially as the device is operated in the larger mass-transfer Graetz number.

【 授权许可】

Unknown