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Water-silver nanofluid application in a TPCT under an external magnetic field

Authors

  • H. Salehi,

    1. Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
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  • S. Zeinali Heris,

    1. Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
    2. Heat Pipe and Nanofluid Research Center, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
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  • S.H. Noie

    1. Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
    2. Heat Pipe and Nanofluid Research Center, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
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Abstract

The efficiency of a two-phase closed thermosyphon (TPCT) with a nanofluid as the working fluid under the effects of a magnetic field is investigated experimentally. In this study the silver/water nanofluid with different concentrations (20 ppm–80 ppm) was tested. Also a magnetic field with various strengths (0.12, 0.35, and 1.2 T) was exerted on the TPCT by a permanent magnet. It was seen that the TPCT heat transfer performance and the thermophysical properties of the base fluid are affected considerably by the nanoparticle addition and magnetic field. According to the experimental results the thermal efficiency of the thermosyphon increased significantly with the nanoparticle concentration increasing as well as the magnetic field strength. The TPCT showed better performance for the highest value of concentration (80 ppm) and magnetic field (1.2 T). Moreover, the experimental results present that the thermal efficiency in the presence of a magnetic field is somewhat increased. © 2012 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.21006

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