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Étude numérique et expérimentale d'un cycle de Rankine-Hirn de faible puissance pour la récupération d'énergie

Abstract : This research was motivated by environmental constraints which impose a reduction in greenhouse gas emissions. The aim of the thesis was to explore the possibility of reducing the consumption of an internal combustion engine using a bottom waste heat recovery system. The study focused on waste heat recovery for low power installations. The Rankine cycle technology was selected to exploit the heat source. An experimental test bench was designed and set up. A hot gas generator simulates an internal combustion engine. Part of the thermal power is absorbed by the evaporator and partially converted into mechanical power. The heat exchanger and piston expander were designed and built in-house. A numerical static model with experimental validation of the evaporator was developed. The model was used to explore the performances of the Rankine cycle over a large operating range. Under restrictive hypotheses, the numerical model showed that is possible to reduce the consumption of a tractor by about 3 to 4 %. A piston expander dynamic model was developed to assist in sizing the expander. The model was used to define a piston expander concept with a simple distribution mechanism. Although a classical distribution mechanism offers better performances, this concept is promising for systems that are simple, small-scale and low-cost.
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Quentin Danel. Étude numérique et expérimentale d'un cycle de Rankine-Hirn de faible puissance pour la récupération d'énergie. Chimie-Physique [physics.chem-ph]. Conservatoire national des arts et metiers - CNAM, 2016. Français. ⟨NNT : 2016CNAM1091⟩. ⟨tel-01669003⟩

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