Performance assessment in a heat exchanger tube fitted with double counter twisted tape inserts

被引：111
作者：
Bhuiya, M. M. K. [1 ,2 ]
Sayem, A. S. M. [1 ,2 ]
Islam, M. [3 ]
Chowdhury, M. S. U. [4 ]
Shahabuddin, M. [5 ]
机构：
[1] Cent Queensland Univ CQUniv, Sch Engn & Technol, Rockhampton, Qld 4702, Australia
[2] Chittagong Univ Engn & Technol CUET, Dept Mech Engn, Chittagong 4349, Bangladesh
[3] Queensland Univ Technol QUT, Sch Phys Chem & Mech Engn, Brisbane, Qld 4001, Australia
[4] Univ New S Wales, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia
[5] Univ Adelaide, Sch Mech Engn, Adelaide, SA 5005, Australia
来源：
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2014年 / 50卷
关键词：
Double counter twisted tape insert; Nusselt number; Friction factor; Thermal enhancement efficiency; TURBULENT-FLOW; TRANSFER ENHANCEMENT; CORRUGATED TUBES; PRESSURE-DROP; TRANSFER COEFFICIENTS; TRANSFER AUGMENTATION; FRICTION FACTORS; CIRCULAR TUBE; PREDICTION;
D O I：
10.1016/j.icheatmasstransfer.2013.11.005
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The present study explored the effects of the double counter twisted tapes on heat transfer and fluid friction characteristics in a heat exchanger tube. The double counter twisted tapes were used as counter-swirl flow generators in the test section. The experiments were performed with double counter twisted tapes of four different twist ratios (y = 1.95, 3.85, 5.92 and 7.75) using air as the testing fluid in a circular tube turbulent flow regime where the Reynolds number was varied from 6950 to 50,050. The experimental results demonstrated that the Nusselt number, friction factor and thermal enhancement efficiency were increased with decreasing twist ratio. The results also revealed that the heat transfer rate in the tube fitted with double counter twisted tape was significantly increased with corresponding increase in pressure drop. In the range of the present work, heat transfer rate and friction factor were obtained to be around 60 to 240% and 91 to 286% higher than those of the plain tube values, respectively. The maximum thermal enhancement efficiency of 134 was achieved by the use of double counter twisted tapes at constant blower power. In addition, the empirical correlations for the Nusselt number, friction factor and thermal enhancement efficiency were also developed, based on the experimental data. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：25 / 33
页数：9
相关论文
共 36 条
[1]   Heat transfer and pressure drop in a spirally grooved tube with twisted tape insert [J].
Bharadwaj, P. ;
Khondge, A. D. ;
Date, A. W. .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2009, 52 (7-8) :1938-1944
[2]   Heat transfer and friction factor characteristics in turbulent flow through a tube fitted with perforated twisted tape inserts [J].
Bhuiya, M. M. K. ;
Chowdhury, M. S. U. ;
Saha, M. ;
Islam, M. T. .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2013, 46 :49-57
[3]   Heat transfer performance evaluation for turbulent flow through a tube with twisted wire brush inserts [J].
Bhuiya, M. M. K. ;
Chowdhury, M. S. U. ;
Islam, M. ;
Ahamed, J. U. ;
Khan, M. J. H. ;
Sarker, M. R. I. ;
Saha, M. .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2012, 39 (10) :1505-1512
[4]   Heat transfer performance for turbulent flow through a tube using double helical tape inserts [J].
Bhuiya, M. M. K. ;
Chowdhury, M. S. U. ;
Ahamed, J. U. ;
Khan, M. J. H. ;
Sarkar, M. A. R. ;
Kalam, M. A. ;
Masjuki, H. H. ;
Shahabuddin, M. .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2012, 39 (06) :818-825
[5]   Heat transfer enhancement and development of correlation for turbulent flow through a tube with triple helical tape inserts [J].
Bhuiya, M. M. K. ;
Ahamed, J. U. ;
Chowdhury, M. S. U. ;
Sarkar, M. A. R. ;
Salam, B. ;
Saidur, R. ;
Masjuki, H. H. ;
Kalam, M. A. .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2012, 39 (01) :94-101
[6]   Turbulent heat transfer and pressure drop in tube fitted with serrated twisted tape [J].
Chang, Shyy Woei ;
Jan, Yih Jena ;
Liou, Jin Shuen .
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2007, 46 (05) :506-518
[7]   Heat transfers in tubes fitted with single, twin, and triple twisted tapes [J].
Chang, SW ;
Yu, KW ;
Lu, MH .
EXPERIMENTAL HEAT TRANSFER, 2005, 18 (04) :279-294
[8]   Heat transfer augmentation by helically twisted tapes as swirl and turbulence promoters [J].
Eiamsa-ard, S. ;
Yongsiri, K. ;
Nanan, K. ;
Thianpong, C. .
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2012, 60 :42-48
[9]   Thermohydraulic investigation of turbulent flow through a round tube equipped with twisted tapes consisting of centre wings and alternate-axes [J].
Eiamsa-ard, S. ;
Wongcharee, K. ;
Eiamsa-ard, P. ;
Thianpong, C. .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2010, 34 (08) :1151-1161
[10]   Turbulent heat transfer enhancement by counter/co-swirling flow in a tube fitted with twin twisted tapes [J].
Eiamsa-ard, S. ;
Thianpong, C. ;
Eiamsa-ard, P. .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2010, 34 (01) :53-62
1234