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Journal of Mechanical Science and Technology

, Volume 28, Issue 5, pp 1841–1847 | Cite as

Heat transfer enhancement and pressure drop analysis in a helically coiled tube using Al2O3 / water nanofluid

  • P. C. Mukesh Kumar
  • J. Kumar
  • R. Tamilarasan
  • S. Sendhil Nathan
  • S. Suresh
Article

Abstract

In this experimental investigation, the heat transfer and pressure drop analysis of a shell and helically coiled tube heat exchanger by using Al2O3 / water nanofluids have been carried out under turbulent flow condition. The Al2O3/ water nanofluids of 0.1%, 0.4%, and 0.8% particle volume concentration have been prepared by using two step method. The tube side experimental Nusselt number of 0.1%, 0.4% and 0.8% nanofluids were found to be 28%, 36% and 56%, respectively higher than water. These enhancements are due to higher thermal conductivity of nanofluid, better fluid mixing and strong secondary flow formation in coiled tube. The pressure drop of 0.1%, 0.4% and 0.8% were found to be 4%, 6%, and 9%, respectively higher than water. The increase in pressure drop is due to increase in nanofluid viscosity while adding nanoparticles. The measurement of nanofluid thermal performance factor is found to be greater than unity. It is concluded that the Al2O3 nanofluid can be applied as a coolant in helically coiled tube heat exchanger to enhance heat transfer with negligible pressure drop.

Keywords

Al2O3 /water nanofluid Helically coiled tube Nanofluid viscosity Secondary flow Thermal conductivity Volume concentration 

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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • P. C. Mukesh Kumar
    • 1
  • J. Kumar
    • 2
  • R. Tamilarasan
    • 1
  • S. Sendhil Nathan
    • 1
  • S. Suresh
    • 3
  1. 1.University College of Engineering PattukkottaiRajamadamIndia
  2. 2.Sasurie College of EngineeringTiruppurIndia
  3. 3.National Institute of TechnologyTiruchirappalliIndia

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