Nuna 9
Nuna is the name of a series of manned solar powered race cars that have won the World Solar Challenge in Australia seven times: in 2001, 2003, 2005, 2007, 2013, 2015 and 2017. The vehicles are built by students who are part of the "Brunel Solar Team" (formerly Nuon Solar Team and Vattenfall Solar Team) at the Delft University of Technology in the Netherlands, sponsored by Brunel (formerly N.V. Nuon Energy). Nuna Design criteria To have a good chance to win, the car has to: *collect as much solar energy as possible *use as little energy as possible to drive at a certain speed. This means special attention to: **the efficiency of transferring electrical energy to the wheels, and **minimizing friction, constituted by: ***air friction (air resistance), and ***rolling friction, which in turn is affected by the weight, among other things Solar cells The solar cells are made of gallium arsenide (GaAs) and consist of three layers. Sunlight that penetrates the upper layer is used in th ...
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