Nusselt Number and Convection Heat Transfer Coefficient for a Coaxial Heat Exchanger Using Al2O3-Water pH=5 Nanofluid

• Main Authors: Răzvan-Silviu Luciu, Theodor Mateescu, Victoria Cotorobai, Thierry Mare
• Format: Article
• Language: English
• Published: Gheorghe Asachi Technical University of Jassy 2009-01-01
• Series: Bulletin of the Polytechnic Institute of Jassy: Constructions, Architechture Section
• Subjects: experimental; nanofluid; Nusselt number.
• Online Access: http://www.ce.tuiasi.ro/~bipcons/Archive/150.pdf

Recently, a new class of fluid made up of metal nano-particles in suspension in a liquid, called nanofluid, appeared. Some numerical studies have shown that these new fluids have a higher heat transfer performance, compared with the conventional liquids. In the present study, we have attempted to study, by experimentation, the thermal performances of a particular nanofluid composed of aluminum oxide ($gamma$ce{Al2O3}) particles dispersed in water for various concentrations ranging from 0 to 4%. The experimental set up is a coaxial exchanger, which is destined to solar application, in which the heating liquid used is the nanofluid studied.