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The paper presents analysis of thermal properties of natural ester modified by nanoparticles C60 and TiO2, used in power transformers. The measurements of thermal properties, such as thermal conductivity, kinematic viscosity, specific heat, density, and thermal expansion were carried out. Measurements were carried out at a temperature of 25 °C, 40 °C, 60 °C and 80 °C. On the basis of measurement results,...
Nanoparticle suspensions have demonstrated superior heat transfer properties and hence appear to be a strong contender to become next generation coolants. While the presence of particles enhances thermal conductivity, they also contribute to increase the fluid viscosity. The latter will lead to demand more pumping power in convective systems, hence questioning the overall economy of the concept. This...
This paper describes an experimental study on the convective heat transfer of SiO2/water nanofluids inside a circular tube with imposed wall temperature. To our knowledge, very few papers have been published with temperature boundary conditions and none in cooling conditions. The experimental apparatus is described which allows us to measure local wall temperatures as well as fluid inlet/outlet temperatures...
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