Improving fuel economy application of the organic Rankine Cycle on a hybrid bus

Cathal Nolan, Roy Douglas, Cedric Rouaud, Aoife Foley

Research output: Contribution to journalArticle

Abstract

Globally vehicle operators are experiencing rising fuel costs and increased
running expenses as governments around the world attempt to decrease carbon dioxide emissions and fossil fuel consumption, due to global warming and the drive to reduce dependency on fossil fuels. Recent advances in hybrid vehicle design have made great strides towards more efficient operation, with regenerative braking being widely used to capture otherwise lost energy. In this paper a hybrid series bus is developed a step further, by installing another method of energy capture on the vehicle. In this case, it is in the form of the Organic Rankine Cycle (ORC). The waste heat expelled to the exhaust and coolant streams is recovered and converted to electrical energy which is then stored in the hybrid vehicles batteries. The electrical energy can then be used for the auxiliary power circuit or to assist in vehicle propulsion, thus reducing the load on the engine, thereby improving the overall fuel economy of the vehicle and reducing carbon dioxide emissions.
Original languageEnglish
Pages (from-to)32
JournalIngegneria dell'Autoveicolo
Volume67
Issue number5/6
Publication statusPublished - 2014

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