Recycle effect on heat transfer enhancement in double-pass heat exchangers under asymmetric isotherm conditions

被引:3
作者
Ho, Chii-Dong [1 ]
Chen, Yi-Chin [1 ]
Lin, Li-Pang [1 ]
机构
[1] Tamkang Univ, Dept Chem & Mat Engn, Energy & Optoelect Mat Res Ctr, Tamsui 251, New Taipei, Taiwan
关键词
Asymmetric isotherm conditions; Conjugated Graelz problems; Heat transfer; Performance improvement; External recycle; EXTERNAL REFLUXES; GRAETZ PROBLEM; CHANNEL;
D O I
10.1016/j.icheatmasstransfer.2015.07.011
中图分类号
O414.1 [热力学];
学科分类号
摘要
The mathematical formulation of a heat transfer flow problem in the recycling parallel-plate heat exchanger under asymmetric wall temperatures was developed theoretically with ignoring axial conduction, and the analytical solution was obtained using a superposition principle and an orthogonal expansion technique in extended power series. The influences of the design parameters of the impermeable-sheet position (Delta), and the operating parameters of the Graetz number (Gz), wall temperature ratio (sigma) and recycle ratio (R) are examined. Significant heat transfer improvement is obtainable by employing double-pass devices instead of using single-pass ones for a larger Graetz number system. A technical feasibility of the new double-pass device was investigated in terms of the Nusselt number and device performance improvement under the effect of wall temperature ratios. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:109 / 113
页数:5
相关论文
共 17 条
[1]   Effects of multiple obstructions on conjugate forced convection heat transfer in tubes [J].
Amin, MR ;
Khan, JA .
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, 1996, 29 (03) :265-279
[2]  
[Anonymous], IEEE ELECT DEVICE LE
[3]   HEAT-TRANSFER TO A VISCOELASTIC FLUID IN LAMINAR-FLOW THROUGH A RECTANGULAR CHANNEL [J].
HARTNETT, JP ;
KOSTIC, M .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1985, 28 (06) :1147-1155
[4]   Heat-transfer enhancement in double-pass flat-plate solar air heaters with recycle [J].
Ho, CD ;
Yeh, HM ;
Wang, RC .
ENERGY, 2005, 30 (15) :2796-2817
[5]   A study of mass transfer efficiency in a parallel-plate channel with external refluxes [J].
Ho, CD ;
Yeh, HM ;
Chiang, SC .
CHEMICAL ENGINEERING JOURNAL, 2002, 85 (2-3) :207-214
[6]   An analytical study of heat and mass transfer through a parallel-plate channel with recycle [J].
Ho, CD ;
Yeh, HM ;
Sheu, WS .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1998, 41 (17) :2589-2599
[7]   An analytical study on the enrichment of heavy water in the continuous thermal-diffusion column with external refluxes [J].
Ho, CD ;
Yeh, HM ;
Guo, JJ .
SEPARATION SCIENCE AND TECHNOLOGY, 2002, 37 (13) :3129-3153
[8]   Mass-transfer enhancement in double-pass mass exchangers with external refluxes [J].
Ho, CD ;
Yeh, HM ;
Chiang, SC .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2001, 40 (24) :5839-5846
[9]   Heat transfer modeling of conjugated Graetz problems in double-pass parallel-plate heat exchangers under asymmetric wall temperatures [J].
Ho, Chii-Dong ;
Chen, Yi-Chin ;
Chang, Hsuan ;
Kang, Shung-Wen .
JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS, 2013, 36 (05) :647-657
[10]   Recycle effect on heat transfer enhancement in double-pass parallel-plate heat exchangers under asymmetric wall fluxes [J].
Ho, Chii-Dong ;
Tu, Jr-Wei ;
Wang, Gow-Bin ;
Lai, Wei-Chi ;
Chen, Wei-Zum .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2010, 37 (03) :274-280