Mass Transfer Improvement on Double-Pass Laminar Counterflow Concentric Circular Mass Exchangers with External Recycle

Abstract

A new external-recycle model at the ends of double-pass concentric circular mass exchangers with uniform wall concentration, demonstrating a considerable mass-transfer efficiency improvement, has been developed and studied theoretically. The effects of the subschannel radius ratio, permeable barrier parameter and recycle ratio on the mass-transfer efficiency improvement as well as on the power consumption increment have been also discussed.