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"The World Cup is an important event for South Africa's future and we wanted to show that renewable energy has a big part to play in that future. We wanted to show the world that it is possible to do renewable energy not just in Europe, but in Africa as well," said Tanguy du Monceau, managing partner at carbon consultancy CO2logic, in an interview with Business Green. Sow the world they did, as Belgium-based wind farm developer Electrawinds won the race to connect its first South African wind turbine to the grid ahead of the opening ceremony on 11 June 2010. It began providing energy free of charge to the Nelson Mandela Bay Football Stadium in Port Elizabeth where many of the World Cup games were scheduled to play in the tournament.
A bladeless wind turbine whose only rotating component is a turbine/driveshaft could generate power at a cost comparable to coal-fired power plants, according to its developers at Solar Aero. The New Hampshire-based company recently announced its patent on the Fuller wind turbine, which is an improvement on a patent issued to Nikola Tesla in 1913. The bladeless wind turbine is completely enclosed in a relatively small compact unit. Instead of using wind-powered blades to rotate a shaft and generator, the Tesla-inspired design consists of an array of closely spaced, parallel, thin metal disks separated by spacers. When air flows in the spaces between the disks, the spacers are arranged in such a way as to provide inward momentum to the air, causing the disks to move. The disks are connected to a shaft by spokes, so that the rotating disks cause the shaft to rotate as well. As explained in the patent held by Howard Fuller, the turbine design “provides maximum efficiency in converting wind energy to mechanical power.” - by Lisa Zyga
