For the past four years, SkySails, a German company, has been testing out the concept of tethering a kite to a ship’s mast in order to boost the vessel’s propulsion and conserve fuel. Early adopters, Bremen ship owners Beluga Shipping who believe the kites will help cut fuel consumption by 15 to 20 percent, have fitted their MV Beluga SkySails with a paraglider-shaped sail and a computerized steering unit for the same. The vessel will make its maiden voyage in early 2007.
Inventor Stephan Wrage says that by cutting fuel use, the SkySail could help reduce emissions of greenhouse gases blamed for global warming. Depending on the vessel and winds, fuel costs for shippers could be cut by more than USD 1,000 a day as SkySails use offshore winds between 330 and 985 feet above the surface of the water. However, they would be useless with head-on winds and would not benefit ships traveling above 16 knots.
Still, Wrage projects 1,500 vessels will have the system by 2015 in view of the European Union restrictions on greenhouse gas emissions that threaten penalties for those who fail to act to curb them, and the fuels that ships use are especially dirty. |