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Publications (19)
In Europe, rapeseed is a renewable raw material which has been widely used for the production of biodiesel by various processes. The transesterification reaction of rapeseed oil with ethanol to biodiesel in supercritical fluid conditions was investigated using several heterogeneous catalysts and preliminary ultrasonic emulsification of the reaction...
In this paper, new experimental vapour–liquid equilibrium data of the furan + n-hexane and furan + toluene binary systems are reported. The data are determined using the ebulliometric technique. The measured data are used to assess the predictions obtained with molecular simulation, a group contribution polar PC-SAFT model and the COSMO-RS and COSM...
Representative reversible endothermic chemical reactions (paraldehyde depolymerization and 2-proponal dehydrogenation) are theoretically assessed for their use in a chemical heat pump design for compact thermal management applications. Equilibrium and dynamic simulations are undertaken to explore the operation of the heat pump which upgrades waste...
Adverse effects of starting-torque transients and high in-rush currents in induction motors are typically mitigated by employing electronically controlled soft starting voltages through silicon-controlled rectifiers (SCRs). However, the heat dissipation in the soft starter must be carefully managed in the design of motor drives. The objective of th...
Experimental investigations have been conducted for quenching of a hot rotating cylinder with initial temperature of about 500–600 °C by a subcooled planar water jet. An original experimental device allowing the estimation of the local boiling curves in the case of a static surface and of a moving surface has been designed. Heat fluxes were measure...
The solution of the linear, inverse, transient heat conduction problem (IHCP) in a cylindrical geometry is analysed. The rotating cylinder under investigation is experiencing boiling convection induced by the impingement of a water jet. The initial temperature is known, additional temperature measurements in time are taken with sensors positioned a...
A method using either a one-dimensional analytical or a two-dimensional numerical inverse technique is developed for measurement of local heat fluxes at the surface of a hot rotating cylinder submitted to the impingement of a subcooled water jet. The direct model calculates the temperature field inside the cylinder that is submitted to a given nonu...
This work aims to verify the feasibility of the estimation of heat fluxes during the cooling of a rotating cylinder by an impinging jet. A semi-analytical method has been developed for this two-dimensional inverse heat conduction problem (IHCP) using Laplace and Fourier transforms technique. The simulations of inversion for two representative test...
Adverse effects of starting-torque transients and high inrush currents in induction motors are typically mitigated by employing electronically controlled soft starting voltages through silicon controlled rectifiers (SCRs). However, the heat dissipation in the soft starter must be carefully managed in the design of motor drives. The objective of thi...
Dans le cadre de cette thèse, nous nous intéressons au problème du refroidissement par impact de jet d une surface en défilement portée à haute température. Il s agit de mieux appréhender les mécanismes d ébullition résultant de l interaction entre le jet et la paroi. L application industrielle visée est liée à l industrie métallurgique. Elle conce...
A fully experimental approach for heat transfer in subcooled jet impingement boiling is presented. Very high heat fluxes can be observed in the stagnation region of the impinging planar jet on a hot rotating cylinder. This study is justified by the necessity of control the thermal path of the flat steel products ; let us recall that the cooling rat...
A theoretical study of heat exchange during the cooling of a rotating cylinder by an im- pinging jet is carried out. The temperature eld is bidimensional - the longitudinal heat conduction being neglected - and is obtained by solving the heat equation using Laplace and Fourier transforms. In order to assess the external heat ux condition, an invers...
Le contrôle de la température de pièces métallurgiques en cours de refroidissement est essentiel puisque la cinétique du refroidissement engendre des transformations cristallines et agit sur les propriétés mécaniques finales de celles-ci. Les sprays permettent d'accroître les échanges thermiques par un mouillage quasi continu de la paroi à refroidi...
