Journal of Applied Science and Engineering

Published by Tamkang University Press


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Ho-Ming Yeh This email address is being protected from spambots. You need JavaScript enabled to view it.1 and Chii-Dong Ho1

1Energy and Opto-Electronic Materials Research Center, Department of Chemical and Materials Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.


Received: November 5, 2010
Accepted: August 1, 2011
Publication Date: March 1, 2012

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Heat transfer in parallel-flow rectangular recuperators with internal recycle has been investigated. In contrast to a single-pass device of same size without recycle, considerable improvement in performance is achievable if one of the flow channels, either heated-fluid phase or cooled-fluid phase, is divided into two subchannels of same width with one performed as the cocurrent-flow operating subchannel and the other as the countercurrent-flow reflux subchannel which provides the increase of fluid velocity, resulting in reduction of heat-transfer resistance. The improvement in performance by recycling operation increases as flow rate and reflux ratio increase with negligible amount of hydraulic-dissipated energy.

Keywords: Heat Transfer, Rectangular Recuperators, Internal Reflux, Parallel Flow


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