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dc.contributor.authorFilipi, Z.en
dc.contributor.authorLouca, Loucas S.en
dc.contributor.authorStefanopoulou, A.en
dc.contributor.authorPukrushpan, J.en
dc.contributor.authorKittirungsi, B.en
dc.contributor.authorPeng, H.en
dc.creatorFilipi, Z.en
dc.creatorLouca, Loucas S.en
dc.creatorStefanopoulou, A.en
dc.creatorPukrushpan, J.en
dc.creatorKittirungsi, B.en
dc.creatorPeng, H.en
dc.description.abstractThis paper investigates the opportunities for improving truck fuel economy through the use of a Fuel Cell Auxiliary Power Unit (FC APU) for silent watch, as well as for powering electrified engine accessories during driving. The particular vehicle selected as the platform for this study is a prototype of the Family of Medium Tactical Vehicles (FMTV) capable of carrying a 5 ton payload. Peak stand-by power requirements for on-board power are determined from the projected future digitized battlefield vehicle requirements. Strategic selection of electrified engine accessories enables engine shutdowns when the vehicle is stopped, thus providing additional fuel savings. Proton Exchange Membrane (PEM) fuel cell is integrated with a partial oxidation reformer in order to allow the use of the same fuel (JP8) as for the propulsion diesel engine. The APU system is modeled and linked with the complete vehicle system simulation, and accessory duty cycles are derived for both silent watch and driving. The results indicate six-fold improvements of the silent watch fuel economy with the FC APU compared to main-engine idling, and relatively modest improvements from the mild electrification and FC APU use during the driving cycle. Combined fuel economy benefits calculated over the hypothetical daily military mission with a combined 10 hour highway/local/off-road driving and 10 hour silent watch are 20.1%. Copyright © 2004 SAE International.en
dc.sourceSAE Technical Papersen
dc.subjectFuel economyen
dc.subjectDiesel enginesen
dc.subjectVehicle systemen
dc.subjectAuxiliary power systemsen
dc.subjectAuxiliary power unitsen
dc.subjectDriving cycleen
dc.subjectDuty cyclesen
dc.subjectEconomy benefiten
dc.subjectElectric utilitiesen
dc.subjectEngine shutdownen
dc.subjectFamily of medium tactical vehiclesen
dc.subjectFuel cellsen
dc.subjectFuel savingsen
dc.subjectMedium tactical trucksen
dc.subjectMilitary missionsen
dc.subjectPartial oxidationsen
dc.subjectPower requirementen
dc.titleFuel cell APU for silent watch and mild electrification of a medium tactical trucken
dc.identifier.doi10.4271/2004-01-1477Πολυτεχνική Σχολή / Faculty of EngineeringΤμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering
dc.contributor.orcidLouca, Loucas S. [0000-0002-0850-2369]

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