Durham University Solar-Powered Car

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Presentation transcript:

Durham University Solar-Powered Car The Design of the Durham University Solar-Powered Car DUSC

Introduction Development of high-performance solar car Good match for Durham School of Engineering Vehicle Design and Development

Vehicle Design

Vehicle Design - Electrical MPPT Solar Cells Battery Module DC-DC Converter Inverter Drive Wheel Motor 42 – 59 VDC 3–200V DC AC var freq multiple units in parallel SUN

Vehicle Design - Electrical Solar Cells Use energy from the sun to generate electricity Maximum power from the sun ~1000 W/m2 Solar cell efficiency ~16% Area of solar panels = 1.8 m x 5 m = 9 m2 Power = 1000 W/m2 x 0.16 x 9m2 = 1440 Watts

Vehicle Design - Electrical Maximum Power Point Trackers (MPPTs) Power = Voltage x Current Voltage and Current from cell both depend on sun! Sometimes voltage from cell < battery voltage MPPTs provide the optimum resistance to the solar cells for maximum power

Vehicle Design - Electrical Motor Direct-drive: no gearbox loss High-torque / low-speed Axial flux “pancake” Integrated into rear wheel 1.8kW, effy ~ 95% Can also act as brake Has potential to be used for real vehicles

Vehicle Design - Electrical Batteries 4 sealed gel lead acid batteries (125 kg total) 48V - 5kWh capacity  energy collected during typical day in UK summer Charge all day, drive for 2 hours at high speed Technical Partner C&D Technologies

Vehicle Design - Mechanical Aerodynamic Design Aerodynamic drag increases with velocity squared Rolling resistance does not change with speed Aero drag dominates power consumption at high speed Computer simulations (CFD) 10% scale parametric models Target CDA ~0.1m2

Vehicle Design - Mechanical Chassis Design Low mass (30kg) low Factor of Safety detailed analysis Computer simulations (FEA) Steel space frame Composite body shell On-road testing verify design loads validate simulation

The Way Forward (N)ASC July 2005, July 2007? WSC Sept 2005, Sept 2007 Jobs to do: Recruit sponsors Spent £45,000 to date Need £17,000+ for spares etc, £20,000 for WSC Website Tune chassis / improve bodyshell Power electronics for drive motor Solar cell encapsulation etc Telemetry?

Durham University Solar-Powered Car The Design of the Durham University Solar-Powered Car DUSC