In this work, the experimental heat transfer of metal oxide nanofluids in a plate heat exchanger was investigated. For this purpose, Al 2 O 3 ( 20 and 40    nm ) / water , TiO 2 ( 10 15 and 25    nm ) / water , and SiO 2 ( 20 30    nm ) / water nanofluids with 0.05, 0.1, and 0.2 wt % of nanoparticle concentration were used to investigate the increment of the heat transfer coefficient for each nanofluid against distilled water. Nanofluid characterization was conducted by dynamic light scattering analysis. Significant enhancements on the heat transfer coefficient in the present nanofluids were observed. The results clearly show that increasing the nanofluid Reynolds number and concentration results in an increase in their heat transfer coefficient. The maximum observed heat transfer enhancement for SiO 2 was obtained at 0.2 wt % and Reynolds number = 37 , which is 2.82. Furthermore, the minimum heat transfer enhancement for Al 2 O 3 (20 nm) was achieved at 0.1 wt % and Reynolds number = 158 with 1.64. A new correlation was derived for Nusselt number based on the experimental data of the mentioned nanofluids with an average relative error percentage of 3.78%. Moreover, the variations of Nusselt number vs Peclet number, the overall heat transfer coefficient vs Reynolds number, and the nanofluid friction factor vs Reynolds number were considered, and interesting results were reported.


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    Titel :

    Experimental Investigation of Metal Oxide Nanofluids in a Plate Heat Exchanger


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2019-05-24


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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