Climate and Water > Wave-trapping machine to make electricity
Wave-trapping machine to make electricity
11/06/2008
The shape of this revolutionary machine, still top-secrets in its details, is of a hot-air balloon. Submerged, it goes 100mt deep down the water to catch waves’ energy. It’s a machine unique in its genre designed by an “Italian brain”, Michele Grassi, researcher at the department of math at the University of Pisa. What is it for? To transforming the waves’ energy into electricity.
Grassi, 38 years old, has built a prototype that gave excellent results offing of Marina di Pisa. In September the final model will be experimented and then it will go the business, i.e. to the selling. The wave-trapping machine can produce energy with costs three times inferior respect to the photovoltaic and similar to those of the Aeolian. With a strategic advantage: “these machines don’t have a visual impact as the Aeolian shovels” Grassi explains, “because they are under the sea and they are ecological/environment friendly”. It’s possible to build them in different sizes and powerfulness. Big and expensive (millions of euros) able to produce a megawatt of energy and small and cheap (100.000 euros) with 100 kilowatt able to provide energy to around 30 apartments.
Better in the Ocean
“The machine is different from all the other projects that aim to derive energy out of waves” Grassi continues, “it can be used in a calm sea as the Mediterranean, even if its efficiency in the ocean could be five times bigger”. The technology? “Easy, it’s based on basic principles of mechanic engineery”. Grassi answers, “and behind the product there is no big industrialization”
The waves’ machine has started already to arouse international interests. A French company has contacted the pisan researcher and the Galles government said it is willing to finance 50% of the realization costs and to find eventual sponsors. “It’s a very flattering proposal that surprised and honored me”, Grassi confirms. Then he adds: “I took my time before answering, although the proposal is extraordinary. I would like that the support would come from my Country. We’ll see”.
In a TEDx WWF session held in Geneva, Switzerland, Stuart Orr talked about water which is a solvable crisis. Stuart Orr is freshwater programme director for WWF International.