The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
C Y Zhao - One of the best experts on this subject based on the ideXlab platform.
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thermal analysis on metal foam filled Heat Exchangers part ii tube Heat Exchangers
International Journal of Heat and Mass Transfer, 2006Co-Authors: C Y Zhao, S A TassouAbstract: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.
Kambiz Vafai - One of the best experts on this subject based on the ideXlab platform.
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Analysis and Characterization of Metal Foam-Filled Double-Pipe Heat Exchangers
Numerical Heat Transfer Part A-applications, 2015Co-Authors: Xi Chen, Fatemeh Tavakkoli, Kambiz VafaiAbstract:The effect of using metal foams in double-pipe Heat Exchangers is investigated in this work. The advantages and drawbacks of using metal foams in these types of Heat exchanger are characterized and quantified. The analysis starts with an investigation of forced convection in metal foam-filled Heat Exchangers using the Brinkman-Forchheimer-extended Darcy model and the Local Thermal Equilibrium (LTE) energy model. An excellent agreement is displayed between the present results and established analytical results. The presented work enables one to establish the optimum conditions for the use of metal foam-filled double-pipe Heat Exchangers.
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a synthesis of fluid and thermal transport models for metal foam Heat Exchangers
International Journal of Heat and Mass Transfer, 2008Co-Authors: Shadi Mahjoob, Kambiz VafaiAbstract:Metal foam Heat Exchangers have considerable advantages in thermal management and Heat recovery over several commercially available Heat Exchangers. In this work, the effects of micro structural metal foam properties, such as porosity, pore and fiber diameters, tortuosity, pore density, and relative density, on the Heat exchanger performance are discussed. The pertinent correlations in the literature for flow and thermal transport in metal foam Heat Exchangers are categorized and investigated. Three main categories are synthesized. In the first category, the correlations for pressure drop and Heat transfer coefficient based on the microstructural properties of the metal foam are given. In the second category, the correlations are specialized for metal foam tube Heat Exchangers. In the third category, correlations are specialized for metal foam channel Heat Exchangers. To investigate the performance of the foam filled Heat Exchangers in comparison with the plain ones, the required pumping power to overcome the pressure drop and Heat transfer rate of foam filled and plain Heat Exchangers are studied and compared. A performance factor is introduced which includes the effects of both Heat transfer rate and pressure drop after inclusion of the metal foam. The results indicate that the performance will be improved substantially when a metal foam is inserted in the tube/channel.
S A Tassou - One of the best experts on this subject based on the ideXlab platform.
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thermal analysis on metal foam filled Heat Exchangers part ii tube Heat Exchangers
International Journal of Heat and Mass Transfer, 2006Co-Authors: C Y Zhao, S A TassouAbstract: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.
Shadi Mahjoob - One of the best experts on this subject based on the ideXlab platform.
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a synthesis of fluid and thermal transport models for metal foam Heat Exchangers
International Journal of Heat and Mass Transfer, 2008Co-Authors: Shadi Mahjoob, Kambiz VafaiAbstract:Metal foam Heat Exchangers have considerable advantages in thermal management and Heat recovery over several commercially available Heat Exchangers. In this work, the effects of micro structural metal foam properties, such as porosity, pore and fiber diameters, tortuosity, pore density, and relative density, on the Heat exchanger performance are discussed. The pertinent correlations in the literature for flow and thermal transport in metal foam Heat Exchangers are categorized and investigated. Three main categories are synthesized. In the first category, the correlations for pressure drop and Heat transfer coefficient based on the microstructural properties of the metal foam are given. In the second category, the correlations are specialized for metal foam tube Heat Exchangers. In the third category, correlations are specialized for metal foam channel Heat Exchangers. To investigate the performance of the foam filled Heat Exchangers in comparison with the plain ones, the required pumping power to overcome the pressure drop and Heat transfer rate of foam filled and plain Heat Exchangers are studied and compared. A performance factor is introduced which includes the effects of both Heat transfer rate and pressure drop after inclusion of the metal foam. The results indicate that the performance will be improved substantially when a metal foam is inserted in the tube/channel.
Mohammad Amani - One of the best experts on this subject based on the ideXlab platform.
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recent research contributions concerning use of nanofluids in Heat Exchangers a critical review
Applied Thermal Engineering, 2018Co-Authors: Mehdi Bahiraei, Reza Rahmani, Ali Yaghoobi, Erfan Khodabandeh, Ramin Mashayekhi, Mohammad AmaniAbstract:Abstract Heat Exchangers have already proven to be important devices for thermal systems in many industrial fields. In order to improve the efficacy of Heat Exchangers, nanofluids are recently employed as coolants in them. Regarding unique characteristics of nanofluids, research studies in this area have witnessed a remarkable growth. This paper reviews and summarizes recent investigations conducted on use of nanofluids in Heat Exchangers including those carried out on plate Heat Exchangers, double-pipe Heat Exchangers, shell and tube Heat Exchangers, and compact Heat Exchangers. Meanwhile, some fascinating aspects about combination of nanofluids with Heat Exchangers are introduced. In addition, the challenges and opportunities for future research are presented and discussed.
