An Analytical Study of Concentric Circular Heat Exchangers with an Impermeable Sheet Inserted for Double-Pass Operations

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Title:	An Analytical Study of Concentric Circular Heat Exchangers with an Impermeable Sheet Inserted for Double-Pass Operations
Other Titles:	二行程同心套管熱交換器之研究
Authors:	Ho, Chii-Dong;Yeh, Ho-Ming;Yang, Wen-Yi
Keywords:	Heat transfer;Concentric circular device;Double-pass operation;Conjugated Graetz problem
Date:	2003-07-01
Issue Date:	2016-04-22 13:21:12 (UTC+8)
Publisher:	臺灣化學工程學會
Abstract:	.A design of inserting a concentric tube with negligible thickness to divide a circular conduit into two subchannels for double-pass flow and recyclic operations, resulting in substantially improved the heat transfer, has been designed and investigated. The results are represented graphically and compared with those in a single-pass device (without an inserting concentric tube and recycle). Heat transfer improvement IS considerably obtainable by employing such a double-pass recyclic device, instead of using the single-pass one. The effect of concentric tube location on the heat transfer efficiency enhancement as well as on the power consumption increment, has been also discussed. 圓形管內加裝一絕熱且可忽略厚度的隔板，使其形成雙套管二行程之熱量傳送的操作設計。結果顯示此種熱交換器對熱傳效率改善有相當助益，而其結果將與單行程圓管裝置（圓管內無絕熱隔板的裝置）之熱傳效率作一番比較。本研究之目的是設計增強熱傳效果的二行程熱交換器，以改善單行程熱交換器之熱傳效率，同時亦探討絕緣隔板位置對提高熱傳效果及功率消耗之影響。
Relation:	中國化學工程學會會誌=Journal of the Chinese Institute of Chemical Engineers 34(4), pp.441-445
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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