Researchers say that cargo ships fitted with wind propulsion systems could reduce their energy use by 50 to 100 per cent if they adjust routes and speeds to take full advantage of favourable winds.
The shipping sector accounts for roughly 3 per cent of global carbon dioxide emissions, a share that continues to rise. Adding technologies such as rigid sails, rotating cylinders and giant kites is already attracting interest from companies seeking lower fuel costs. A new study shows that even greater gains are possible when vessels also vary their paths and speeds to maximise wind assistance while staying within realistic delivery times.