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Thermal analysis on metal-foam filled heat exchangers. Part II: Tube heat exchangers |
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| Affiliation: | 1. State Key Laboratory of Multiphase Flow and Heat Transfer, School of Energy and Power Engineering, Xi’an Jiaotong University, Shaanxi 710049, PR China;2. Department of Mechanical Engineering, School of Engineering and Design, Brunel University, Uxbridge, Middlesex UB8 3PH, UK;1. School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester, UK;2. Mechanical Engineering Department, College of Engineering, University of Kufa, Najaf, Iraq;1. Laboratory of Multiphase Flows and Porous Media, Faculty of Mechanical and Process Engineering, University of Sciences and Technology Houari Boumedienne USTHB, B.P. 32, El Alia, Bab Ezzouar 16111, Algiers, Algeria;2. LTI, University Jules Verne Amiens, France |
| Abstract: | The forced convection heat transfer characteristics in high porosity open-cell metal-foam filled tube heat exchangers are analysed in this paper. The Brinkman-extended Darcy momentum model and two-equation heat transfer model for porous media are employed for the analysis of the heat transfer performance. The morphological effects of metal foams on overall heat transfer are examined. The optimal foam-area ratio for a metal-foam filled counter-flow tube-in-tube heat exchanger is predicted. The study shows that the thermal performance of a metal-foam heat exchanger can be superior to that of conventional finned tube heat exchangers. |
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