The Hybrid Electric Vehicle Team of Virginia Tech (HEVT) has integrated a PEM (proton exchange membrane) fuel cell as auxiliary power unit of a series hybrid design to produce a highly efficient zero-emission vehicle. Overall fuel cell system efficiency, vehicle energy flow, and fuel usage was determined by testing of the fuel cell system and vehicle components. A 20 kW fuel cell was used in a series hybrid configuration to obtain good performance from a mid-size sedan, a 1997 Chevrolet Lumina renamed ANIMUL H2, carrying an advanced powertrain, using an efficient AC induction drivetrain, regenerative braking, compressed hydrogen fuel storage, and an advanced lead-acid battery pack for peak power load leveling. The fuel cell supplies the average power demand and sustains the battery pack state-of-charge within a 40-80% window. In order to optimise system efficiency, a load-following strategy controls the fuel cell power level. The vehicle weighed 2000 kg (4400 lb) and achieved a combined city / highway fuel economy of 9 ltr/100 km or 26 mpgge (miles per gallon gasoline equivalent). Performance characteristics, such as acceleration, handling, and consumer acceptability meet or exceed those of the stock vehicle. The conversion of an existing conventional vehicle and limitations of the FutureCar Challenge rules prevent large reductions in mass needed to improve the energy efficiency of the vehicle. The estimated fuel economy for a ground-up lightweight redesign is about 51 mpgge or nearly twice the stock vehicle.
Systems integration and performance issues in a fuel cell hybrid electric vehicle
Systemintegration und Leistungsmerkmale eines hybridelektrischen Fahrzeugs mit Brennstoffzelle
2000
13 Seiten, 15 Bilder, 5 Tabellen, 9 Quellen
Conference paper
English
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