Experimental and numerical investigation of thermal characteristics of a novel concentric type tube heat exchanger with turbulators

被引：14
作者：
Sahin, Haci Mehmet [1 ]
Baysal, Esref [2 ]
Dal, Ali Riza [3 ]
机构：
[1] Gazi Univ, Fac Technol, TR-06503 Ankara, Turkey
[2] Batman Univ, Vocat Sch, Dept Mech & Met Technol, Machine Program, Batman, Turkey
[3] Undersecretariat Maritime Affairs, Ankara, Turkey
来源：
INTERNATIONAL JOURNAL OF ENERGY RESEARCH | 2013年 / 37卷 / 09期
关键词：
concentric tube heat exchangers; heat transfer enhancement; friction factor; numerical simulation; CFD; TRANSFER ENHANCEMENT; PRESSURE-DROP; TRANSFER BEHAVIORS; FLOW FRICTION; CONICAL-RING; PIPE; PERFORMANCE; ANGLES;
D O I：
10.1002/er.2919
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In this study, the heat transfer performance and friction characteristics of a novel concentric tube heat exchanger with different pitches of helical turbulators were investigated experimentally and numerically for a Reynolds number range from 3000 to 14 000. An experimental system was established to obtain experimental data. The numerical simulations were performed by using a three dimensional numerical computation technique, a commercial CFD computer code. Then, the heat transfer performance and friction characteristics of several helical turbulators were compared. The experimental, numerical and empirical correlation results were in a good agreement with each others. As a result, the heat transfer enhancements using turbulators were 2.91, 2.41, 2.18 and 1.99 times better than the smooth tube for pitch distances of p=20, 40, 60 and 80 mm, respectively. Copyright (c) 2012 John Wiley & Sons, Ltd.
引用
收藏
页码：1088 / 1102
页数：15
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