A Comprehensive Review on Nanofluids; Synthesis, Applications and Thermodynamic Characterization


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Afshari F., Rahimpour K., Sözen A., Hanlar A., Tuncer A. D., Mofrad R. T.

in: Scientific Studies on the Edge of Global Warming, Afşin Güngör,Ali Özhna Akyüz,Azim Doğuş Tuncer, Editor, Nobel Yayınevi, Ankara, pp.261-276, 2020

  • Publication Type: Book Chapter / Chapter Research Book
  • Publication Date: 2020
  • Publisher: Nobel Yayınevi
  • City: Ankara
  • Page Numbers: pp.261-276
  • Editors: Afşin Güngör,Ali Özhna Akyüz,Azim Doğuş Tuncer, Editor
  • Gazi University Affiliated: Yes

Abstract

Nanofluids (NFs) are considered to be a fluid where nanometer-sized particles are used in the basic fluid to increase heat transfer rate. Conventional heat transfer fluids (which can be water, oil and etc.) have lower thermal conductivity value when compared to that fluids with nano particles suspended in conventional heat transfer basic fluid. Since the solid nanoparticles (NPs) such as TiO, Al2O3, Cu, CuO, SiO are suspended in the base heat transfer fluid with low thermal conductivity, the efficient thermal conductivity and the convective heat transfer of the original fluid will be enhanced [1]. Nanofluid TiO2/water (2% Wt./Wt.) as heat transfer fluid was employed and with the aim of incrementing solubility of NPs TiO2, Triton X-100 as a chemical agent was added to the mixture. It was revealed that, by using TiO2/water entire heat transfer coefficient can be remarkably increased as 10%. NPs was used in optimum size and mixing ratio with surfactant usage for preventing flocculation and sedimentation problems. This issue can prevent particle accumulation inside fluid which could occur inside used exchanger