Defense of Mehrez AIANE's thesis

April 18, 2019 10:30 am

On Thursday, April 18, 2019, Mehrez AIANE, PhD student in energy and process engineering at the Laboratoire d'Optimisation de la Conception et Ingénierie de l'Environnement (LOCIE), will defend his thesis "Caractérisation et modélisation d'un système de climatisation par absorption".

The defense will take place at 10:30 am, in the amphitheater of the mountain pole, on the Bourget-du-Lac campus.

Summary of the thesis

In response to growing concerns about the representativeness of customer usage in terms of emissions (including CO2, but also other gases), over-consumption of air conditioning will eventually be measured and displayed to the customer. Similarly, the measurement of pollutant emissions will be carried out more closely to usage, including the start-up of accessories. Given current technical limitations, it is therefore important to offer a technical alternative to compression air conditioning. Absorption air-conditioning is a particularly promising alternative, making it possible to recover engine waste heat with very low energy consumption and no environmental impact. Absorption-based automotive air-conditioning has already been the subject of 2 theses which have enabled us to gain a detailed understanding of the absorption process within compact absorbers - Modeling of the absorption phenomenon (R. Goulet / CETHIL) - Optimization of a trickling absorption film (H. OBAME MVE / CETHIL) The aim of this new thesis is to study the system in its entirety, integrating all the system components and studying the elements limiting performance: fluid distribution, pressure drops, boiling development, droplet projections and the presence of non-condensables. To this end, a global model of the machine will be developed, incorporating the results of previous studies. It will enable us to assess user life situations, particularly in transient mode, evaluate the liquid volumes to be taken into account in the design, and better identify the causes and consequences of the performance variations observed on the bench. The model will be validated by specific tests to be defined and carried out.