Experimental and numerical investigation of thermal characteristics of a novel concentric type tube heat exchanger with turbulators
| Autor: | Ali Rıza Dal, Hacı Mehmet Şahin, Eşref Baysal |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Engineering
Computer simulation Renewable Energy Sustainability and the Environment business.industry Heat transfer enhancement Energy Engineering and Power Technology Mechanical engineering Reynolds number Mechanics Computational fluid dynamics Concentric tube heat exchanger Turbulator symbols.namesake Fuel Technology Nuclear Energy and Engineering Heat exchanger Heat transfer symbols business |
| Zdroj: | International Journal of Energy Research. 37:1088-1102 |
| ISSN: | 0363-907X |
| Popis: | SUMMARY 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 © 2012 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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