Comparison of the thermal performances of two nanofluids at low temperature in a plate heat exchanger

Thierry Maré (1) , Halelfadl Salma (1) , Sow Ousmane (2) , Patrice Estellé (1) , Steven Duret (3) , Bazantay Frederic (3)

1 LGCGM - Laboratoire de Génie Civil et Génie Mécanique
2 lmme - Laboratoire Matériaux Mécanique et Energétique
3 Pôle Cristal, Centre Technique Froid et Climatisation

The objective of this study is to compare experimentally the thermal performances of two types of commercial nanofluids. The first is composed of oxides of alumina (Al2O3) dispersed in water and the second one is aqueous suspensions of nanotubes of carbons (CNTs). The viscosity of the nanofluids is measured as a function of the temperature between 2 and 10°C. An experimental device, containing three thermal buckles controlled in temperature and greatly instrumented permits to study the thermal convective transfers. The evolution of the convective coefficient permits to study the convective thermal transfers. The evolution of the convective coefficient is presented according to the Reynolds number, at low temperature from 0 to 10°C and for the two aforementioned nanofluids. An assessment of the pressure drops in the circuit as well as of the powers of the circulator and outputs is dealt with.

Mots clés: Pressure drop; Experimental; Nanofluid; Nanoparticles; Viscosity; Transfers of convective heat; Exchanger of heat plates

Domaines: Thermique [physics.class-ph]; Thermique [physics.class-ph]

Thierry Maré, Halelfadl Salma, Sow Ousmane, Patrice Estellé, Steven Duret, et al.. Comparison of the thermal performances of two nanofluids at low temperature in a plate heat exchanger. Experimental Thermal and Fluid Science, 2011, 35, pp.1535-1543. ⟨10.1016/j.expthermflusci.2011.07.004⟩. ⟨hal-00667139⟩