28Jun 2017

PREPARATION AND CHARACTERIZATION OF WATER-BASE AL2O3 NANOFLUIDS FOR HIGH VOLTAGE APPLICATIONS COOLING.

  • Mechanical Power Engineering Department, Cairo University, Cairo, Egypt.
  • Experimental Nuclear Physics Department (Cyclotron Facility), Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt.
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In this study, the water-base Al2O3 nanofluids were synthesized for the high voltage application cooling enhancement. Firstly, the alumina (Al2O3) was prepared by the sol-gel technique to make alumina nanparticles. The synthesized Al2O3 was inspected by the X-Ray Diffractometer and the Transmission Electron Microscopy. The inspected Al2O3 was a single phase material, which had average particles sizes ≈ 8nm: 12 nm with cubic shapes. The water-base Al2O3 nanofluids were synthesized by the two-step method with different weight concentrations of alumina (0.2%, 0.4%, 0.6%, 0.8%, 1%, and 1.2%). The alumina was used in the nanofluids synthesizing with small concentrations to reduce particles agglomeration chance. The thermal conductivity of the synthesized nanofluids increased with increasing of Al2O3weight concentration as well as with temperature increasing, which gave higher thermal conductivity by about 11% at room temperature and about 25% at T=410C for 1.2% Al2O3 weight concentration. Increasing of Al2O3 concentration increased the viscosity of prepared nanofluid, but its viscosity decreased with temperature rising. The water-base Al2O3 nanofluid electrical conductivity increased with Al2O3 concentration increasing, and increased with temperature ascending; however the synthesized nanofluids electrical conductivities were still low values. So the water-base Al2O3 nanofluids could enhance the cooling of high voltage applications because of the significant thermal conductivity increasing at low nanoparticles concentration, and these nanofluids could be safe for the high voltage applications due to their low electrical conductivity.

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[Abdalla S. Hanafi, Amr Abido, U. Seddik and M. Al-abyad. (2017); PREPARATION AND CHARACTERIZATION OF WATER-BASE AL2O3 NANOFLUIDS FOR HIGH VOLTAGE APPLICATIONS COOLING. Int. J. of Adv. Res. 5 (Jun). 2318-2328] (ISSN 2320-5407). www.journalijar.com

Amr Abido
Experimental Nuclear Physics Department (Cyclotron Facility), Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt.

DOI:

Article DOI: 10.21474/IJAR01/4675      
DOI URL: https://dx.doi.org/10.21474/IJAR01/4675

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