Shahrood University of Technology Journal of Solid and Fluid Mechanics 2251-9475 9 2 2019 06 22 Performance evaluation of Ferric oxide (Fe3O4) and Graphene nanoplatelet (GNP) nanoparticles in solar steam generation Performance evaluation of Ferric oxide (Fe3O4) and Graphene nanoplatelet (GNP) nanoparticles in solar steam generation 181 196 1558 10.22044/jsfm.2019.7509.2724 FA M. M. Ghafurian Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi university of Mashhad, Mashhad, Iran H. Niazmand Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi university of Mashhad, Mashhad, Iran Z. Akbari Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi university of Mashhad, Mashhad, Iran B. Bakhsh Zahmatkesh Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi university of Mashhad, Mashhad, Iran Journal Article 2018 10 02 In the present work, the performance of water-based Fe3O4 (magnetite) nanofluid and graphene nanoplatelet (GNP) nanofluid in solar steam generation has been evaluated. For this purpose, a solar simulator, a beaker containing nanofluid, an electronic balance and temperature sensors were employed. In the first place, magnetite nanofluid with different mass fractions (0.01, 0.02 and 0.04 %) and GNP nanofluid with mass fractions of 0.001, 0.002 and 0.004% were separately exposed to solar illumination at intensity of 3.5 sun kW/m2. Then the most efficient concentration of magnetite nanofluid was mixed with different concentrations of GNP nanofluid and the photothermal conversion and solar evaporation behavior of the mixed nanofluid was studied. The results showed that adding the nanoparticles mentioned above to pure water, Highly increases the light absorption so that the solar vapor generation efficiency of magnetite nanofluid with concentration of 0.04 % mass weight and GNP nanofluid with the mass fraction of 0.004 % were 1.97 and 2.69 times as high as that of pure water. And the mixed nanofluid containing 0.01% mass weight of magnetite and 0.004% mass weight of GNP has a solar evaporation efficiency of 32.4% which is while the evaporation efficiency of pure water is 14.13%. In the present work, the performance of water-based Fe3O4 (magnetite) nanofluid and graphene nanoplatelet (GNP) nanofluid in solar steam generation has been evaluated. For this purpose, a solar simulator, a beaker containing nanofluid, an electronic balance and temperature sensors were employed. In the first place, magnetite nanofluid with different mass fractions (0.01, 0.02 and 0.04 %) and GNP nanofluid with mass fractions of 0.001, 0.002 and 0.004% were separately exposed to solar illumination at intensity of 3.5 sun kW/m2. Then the most efficient concentration of magnetite nanofluid was mixed with different concentrations of GNP nanofluid and the photothermal conversion and solar evaporation behavior of the mixed nanofluid was studied. The results showed that adding the nanoparticles mentioned above to pure water, Highly increases the light absorption so that the solar vapor generation efficiency of magnetite nanofluid with concentration of 0.04 % mass weight and GNP nanofluid with the mass fraction of 0.004 % were 1.97 and 2.69 times as high as that of pure water. And the mixed nanofluid containing 0.01% mass weight of magnetite and 0.004% mass weight of GNP has a solar evaporation efficiency of 32.4% which is while the evaporation efficiency of pure water is 14.13%. https://jsfm.shahroodut.ac.ir/article_1558_13b47fe3692a220b3b418925827bdfcb.pdf