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Session: New applications: Automotive
Session starts: Monday 07 October, 10:00
Presentation starts: 10:40
Room: Willem Burger Zaal

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Ludovic Guillaume (University of Liège)
A. Legros (University of Liège)
Steven Quoilin (University of Liège)
Sebastien Declaye (University of Liège)
Vincent Lemort (University of Liège)

Abstract:
The interest in organic Rankine cycles for waste heat recovery on internal combustion engines has grown significantly for the past few years. Indeed, in such engines, only about one third of the energy available is actually converted into effective power, what remains being dissipated into heat. Therefore, since it becomes really challenging to increase the engine efficiency itself, solutions that focus on the recovery of this waste heat are increasingly investigated to improve the energetic efficiency of vehicles. Among these solutions, Organic Rankine Cycle systems are particularly appropriate. The adoption of such technology in the automotive domain requires a specific R&D activity to select and develop the components and identify the most appropriate system architecture. Particularly, the selection of the working fluid and of the expansion machine technology constitutes an important part of this research. This paper attempts to address this problematic of selecting the architecture, the expander and the working fluid for a waste heat recovery organic (or non-organic) Rankine cycle on a truck engine. It focuses especially on three expander technologies: the scroll, the piston and the screw expanders, and three working fluids: R245fa, ethanol and water.