Record number :
Title of article :
Preparation and heat transfer properties of nanoparticle-in-transformer oil dispersions as advanced energy-efficient coolants
Author/Authors :
Choi، نويسنده , , C. and Yoo، نويسنده , , H.S. and Oh، نويسنده , , J.M.، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2008
Pages :
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Abstract :
Three kinds of nanofluids are prepared by dispersing Al2O3 and AlN nanoparticles-in-transformer oil. The thermal conductivity of the nanoparticle–oil mixtures increases with particle volume fraction and thermal conductivity of the solid particle itself. The AlN nanoparticles at a volume fraction of 0.5% can increase the thermal conductivity of the transformer oil by 8% and the overall heat transfer coefficient by 20%. From the natural convection test using a prototype transformer, the cooling effect of Al2O3/AlN-oil nanofluids on the heating element and oil itself is confirmed. However, the excess quantity of surfactant has a harmful effect on viscosity, thermal property, chemical stability, and thus it is strongly recommended to control the addition of the surfactant with great care.
Keywords :
dispersion , thermal conductivity , Surface modification , nanofluid , Transformer Oil
Journal title :
Current Applied Physics
Journal title :
Current Applied Physics
Serial Year :
Link To Document :