L21-fuelcell3-1 - Fuel Cell Hybrid Electric Vehicles 1...

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Unformatted text preview: Fuel Cell Hybrid Electric Vehicles 1 8/19/2005 LECTURE LECTURE LECTURE LECTURE # # # # 21 21 21 21 TOPIC TOPIC TOPIC TOPIC: F u e l C e l l H y b r i d E l e c t r i c V e h i c l e s Fuel Cell Hybrid Electric Vehicles 2 8/19/2005 Hybrid Electrical Vehicle s A hybrid electric vehicle (HEV) augments an electric vehicle (EV) with a second source of power referred to as the alternative power unit (APU) s In a pure electric vehicles b Do not have adequate range b Recharging is requires and so is impractical for driving extended distances b If air conditioning or heating is used, the vehicles range is further reduced s Here alternative power unit is used as a second source of energy, is gaining acceptance and is overcoming some of the problems of pure electric vehicles Fuel Cell Hybrid Electric Vehicles 3 8/19/2005 s It operates the alternative power unit to supply the power required by the vehicle, to recharge the batteries, and to power accessories like the air conditioner and heater s These cars can exceed the limited 100 mile (160 km) range-per-charge of most electric vehicles and have the potential to limit emissions to near zero s A hybrid can achieve the cruising range and performance advantages of conventional vehicles with: b Low-noise b Low-exhaust emissions b Energy independence benefits Hybrid Electrical Vehicle Fuel Cell Hybrid Electric Vehicles 4 8/19/2005 Figure: Electric Vehicles Hybrid Electrical Vehicle Source: http://www.eere.energy.gov/hydrogenandfuelcells/tech_validation/pdfs/fcm08r0.pdf Fuel Cell Hybrid Electric Vehicles 5 8/19/2005 s Two types of hybrid vehicle configurations b The series hybrids b The parallel hybrids Series Hybrids s A series hybrid is similar to an electric vehicle with an on-board generator s The vehicle runs on battery power like a pure electric vehicle until the batteries reach a predetermined discharged level s At that point the APU turns on and begins recharging the battery s The APU operates until the batteries are charged to a predetermined level s The length of time the APU is on depends on the size of the batteries and the APU itself s Since the APU is not directly connected to the drive train, it can be run at its optimal operating condition s Thus we have b Increase fuel economy b emissions are reduced relative to a pure IC engine vehicle Hybrid Electrical Vehicle Fuel Cell Hybrid Electric Vehicles 6 8/19/2005 Figure: Schematic of a Series HEV Hybrid Electrical Vehicle Source: http://www.eere.energy.gov/hydrogenandfuelcells/tech_validation/pdfs/fcm08r0.pdf http://www....
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This note was uploaded on 09/05/2011 for the course LECTURE 101 taught by Professor Staff during the Fall '09 term at University of Florida.

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L21-fuelcell3-1 - Fuel Cell Hybrid Electric Vehicles 1...

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