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Applied Solar Energy

, Volume 54, Issue 6, pp 428–432 | Cite as

Study of Sedimentation Process in Nanofluids with Various Concentrations of SiO2 and Al2O3 Nanoparticles

  • J. S. AkhatovEmail author
  • E.T. Juraev
  • T. I. Juraev
  • V. N. Avdievich
SOLAR INSTALLATIONS AND THEIR APPLICATION
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Abstract

This work focuses on the preparation of nanoliquids with application of nanoparticles in order to study sedimentation processes in suspensions chosen. Nanoliquids on the basis of SiO2 and Al2O3 nanoparticles with sizes of 50 nm are prepared at their various concentrations using water as a basic liquid. The sedimentation process of the suspension in a steady state and for a long time has been monitored. In accordance with preliminary tests, sedimentation in SiO2-based nanoliquids is slower than that in nanoliquids on the basis of Al2O3 nanoparticles. The monitoring for 72 h of sedimentation of nanoliquids prepared using a two-step method with application of two types of SiO2 nanoparticles with sizes of 12 nm and 16 nm, as well as Al2O3 with a size of 50 nm, reveals that sedimentation and agglomeration processes in the considered nanoliquids depend to a large extent on the size and concentration of nanoparticles. The optimal sizes of particles and their concentrations in the suspension result in a very weak sedimentation.

Keywords:

solar thermal applications heat transfer fluid nanofluid sedimentation 

Notes

ACKNOWLEDGMENTS

This work was supported within the framework of the project FA-Atekh-2018-422: “The Development of the Technology for Synthesis and Application of Nanoliquid Coolants in Solar Heat Converters.”

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Copyright information

© Allerton Press, Inc. 2018

Authors and Affiliations

  • J. S. Akhatov
    • 1
    Email author
  • E.T. Juraev
    • 1
  • T. I. Juraev
    • 1
  • V. N. Avdievich
    • 2
  1. 1.Physico-Technical Institute NPO Fizika-Solntse, Academy of Sciences of the Republic of UzbekistanBukharaUzbekistan
  2. 2.Institute of Ion-Plasma and Laser Technologies, Academy of Sciences of the Republic of UzbekistanTashkentUzbekistan

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