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Thermal analysis and thermo-hydraulic characteristics of zirconia–water nanofluid under a convective boiling regime

  • M. M. Sarafraz
  • I. Tlili
  • Zhe Tian
  • Ahmad Raza Khan
  • Mohammad Reza SafaeiEmail author
Article
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Abstract

In this research, flow boiling heat transfer of zirconia–water nanofluid inside a heat exchanger was experimentally investigated. The system was assessed for heat fluxes ranging from 10 to 150 kW m−2, inlet temperatures of 323 K to 353 K, mass flow rates of 1–10 kg s−1 and mass concentrations of mass% = 0.1 to 0.3%. Results showed that the boiling thermal performance and heat transfer coefficient of zirconia nanofluid are plausible and this nanofluid can be utilized as a coolant inside the two-phase heat exchanging systems. However, the pressure drop associated with the use of zirconia nanoparticles suppressed the thermal efficiency of the system. Likewise, particulate fouling was not observed during the experiments and bubble formation was not affected by the deposition of nanoparticles on the boiling surface. At mass% = 0.3, the boiling heat transfer coefficient was improved by 35.8%; however, pressure drop value was also augmented. Likewise, temperature increased the heat transfer coefficient slightly which was attributed to the improvement in the thermo-physical properties of nanofluid such as thermal conductivity.

Keywords

Zirconia/water nanofluid Flow boiling Annulus Bubble formation 

Notes

Acknowledgements

The first author of this work tends to appreciate the University of Semnan for sharing the facility. The first author also acknowledges the microfluidics laboratory at the University of Adelaide for sharing the facility. Also, Rayan Sanat CO. is acknowledged for sharing the machinery for fabricating the heat exchanger. Dr. Zhe Tian acknowledges the NSFC (51709244), Taishan Scholar (tsqn201812025) and Fundamental Research for Central Universities (201941008). Dr. Ahmad Raza Khan would like to thank Deanship of Scientific Research at Majmaah University for supporting this work under the Project Number No. 1440-108.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • M. M. Sarafraz
    • 1
  • I. Tlili
    • 2
  • Zhe Tian
    • 3
  • Ahmad Raza Khan
    • 4
  • Mohammad Reza Safaei
    • 5
    • 6
    Email author
  1. 1.School of Mechanical EngineeringThe University of AdelaideAdelaideAustralia
  2. 2.Department of Mechanical and Industrial Engineering, College of EngineeringMajmaah UniversityAl-MajmaahSaudi Arabia
  3. 3.School of EngineeringOcean University of ChinaQingdaoChina
  4. 4.Department of Information Technology, College of Computer and Information SciencesMajmaah UniversityAl-MajmaahSaudi Arabia
  5. 5.Division of Computational Physics, Institute for Computational ScienceTon Duc Tang UniversityHo Chi Minh CityVietnam
  6. 6.Faculty of Electrical and Electronics EngineeringTon Duc Thang UniversityHo Chi Minh CityVietnam

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