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Session: Session 7: Small-scale ORC's
Session starts: Monday 12 October, 16:20
Presentation starts: 16:40
Room: 1B Europe

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José Galindo (CMT – Motores Térmicos, Universitat Politècnica de València, Spain)
Vicente Dolz (CMT – Motores Térmicos, Universitat Politècnica de València, Spain)
Lucía Royo (CMT – Motores Térmicos, Universitat Politècnica de València, Spain)
Régine Haller (Valeo Systèmes Thermiques, France)
Julien Melis (Exoès, France)

Abstract:
Waste Heat Recovery in exhaust gas flow of automotive engines has proved to be a path to increase the overall efficiency of automotive vehicles. Recovery potential of up to 7% are shown in several works in the literature. However, most of them are theoretical estimations. Some of them presents results from prototypes fed by steady flow generated in an auxiliary gas tank and not with actual engine exhaust gases. This paper deals with the simulation model of a volumetric expander, integrated in an ORC mock-up, coupled to a 2 l turbocharged gasoline engine and using ethanol as working fluid. An experimental facility of an ethanol ORC using a swash-plate expander coupled to an Ecoboost 2.0 engine has then been used to correlate it. The target is to understand the physical phenomena which are not predictable by simulation and can only be observed by experimentation and secondly, to carry out some parametric studies showing the potential for optimizing different elements of the expander machine.