In order to cope with increasing oil prices and reinforced CO2 regulations, truck and car manufacturers are looking for vehicle efficiency improvements. As most of them are today powered by an internal combustion engine, they have fuel-to-shaft efficiency of 20 to 40%, which means that a huge part of the fuel energy is dissipated in heat. Different systems are currently being studied by the manufacturers to recover a part of the waste heat available in the engine exhaust line. Although the Rankine cycle offers today the highest potential, thermoelectricity (Seebeck effect) features interesting advantages like direct electricity production, reliable (no-moving parts) and compact technology. This paper focuses on thermoelectric systems and particularly on the RENOTER project (2008-2012). The first part of the paper presents RENOTER project and explains which exergy is available on passenger cars and commercial vehicles. The second part presents the heat exchanger designed and tested in the project, including the simulation work performed. The third part of the paper presents the systemic approach used to evaluate the thermoelectric generator impacts at the vehicle level (electronics, cooling capacity etc.).
Waste heat recovery by thermoelectricity on passenger car and heavy-duty truck diesel engine: The RENOTER project
2012
8 Seiten, 15 Bilder, 1 Tabelle, 11 Quellen
Conference paper
Storage medium
English
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