Germany's green shipbuilders hark back to the age of sail

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Germany's green shipbuilders hark back to the age of sail

Roger Boyes in Berlin December 15, 2007

_http://www.timesonline.co.uk/tol/news/environment/article3054229.ece_

(http://www.timesonline.co.uk/tol/news/environment/article3054229.ece)

 

The age of sail could be staging something of a comeback as part of an

imaginative attempt to cut greenhouse gases on the high seas.

 

German engineers have devised a way of tugging merchant vessels along with

huge, computer-steered kites, known as SkySails, that catch the ocean winds.

Today the first new cargo ship to harness wind power in well over a century

will be launched in Hamburg, with the maiden journey taking the 10,000-tonne MS

Beluga Skysails across the Atlantic to Houston.

 

If the Beluga performs well on wind power and if the high-flying kites

dramatically cut its fuel consumption, then the age of sail will be back.

 

“It marks the beginning of a revolution in the way that ships are powered,â€

said Stephan Wrage, the inventor of the SkySails idea. “We calculate that

the sails can reduce fuel consumption by between 30 and 50 per cent, depending

on the wind conditions.

 

“The system could be applied to about 60,000 vessels out of the 100,000 or

so listed in the Lloyd’s register. Bulk carriers, tankers — they could all

benefit from the flying sails.â€

 

Orders are already coming in, ranging from trawlers to a super-yacht. If he

realises his dream of re-equipping the world fleet, Mr Wrage calculates that

his sails could save 142 million tonnes of CO2 a year, equivalent to about

15 per cent of Germany’s total emissions.

 

The 35-year-old engineer, who came up with the idea as a teenager when he

found himself being dragged by a kite along a blustery North Sea beach, is not

the only person brooding about how exactly to reduce the gases released by

the world’s shipping fleets.

 

The problem is huge. Merchant ships, which carry 90 per cent of the world’s

merchandise, produce more sulphur dioxide than all the cars and lorries on

the planet. And, according to the International Council on Clean

Transportation, they also generate about 27 per cent of the world’s nitrogen

oxide

emissions.

 

Wallenius Wilhelmsen Logistics, the Norwegian fleet management company, has

designed a green flagship, the Orcelle, which will use rigid, rotating sails

to capture the strongest winds. When the wind drops the sails can be used as

solar panels. But the company admits that it could take 15 years before the

ship is developed.

 

The most straightforward way of reducing sea-borne pollution would be to

impose a speed limit on the oceans. Carbon emissions would drop by 23 per cent

if ships cut their speed by 10 per cent — but shipping experts say that

slower

cargo movements would lead to more vessels being deployed, and pollution

would return to its former levels.

 

Mr Wrage believes he has solved the problem of reducing engine power while

maintaining speed. “As soon as the winds are strong, the captain can throttle

back using our system,†he said. “Maybe he won’t cut the engine entirely,

but he can rely on the sails.â€

 

In the great 19th-century battle of the seas between sail and steam,

steamboats usually had masts and auxiliary sails to give them some extra speed.

But

by the 20th century, the power of wind was being dismissed as an anachronism,

primitive and unpredictable.

 

“That was because sails were fixed to on-deck masts and were vulnerable to

the whims of the winds on the surface of the sea, sometimes dipping, sometimes

picking up,†says Mr Wrage. “The strength of the SkySail is that it

operates at a height where the winds are strongest and most stable.â€

 

The sails, made of an ultralight synthetic fibre, are shot up as much as

300m (984ft) into the sky. A computer console on the bridge feeds in data on

wind strength and direction. A track running around the ship allows the

kites to move and scoop up the wind from virtually every direction.

 

“The sails are environmentally friendly and can save me a load of money,â€

says Niels Stolberg, owner of the Beluga line who might — if the maiden

voyage

goes well — end up buying the system for his entire fleet of 47 vessels. Mr

Wrage calculates that most ship owners should be able to recoup their

£290,000 investment in the kite sails within three years.

 

But for some the idea is about more than saving cash, and the planet. It is

about the adventure and beauty of sails. “If you learned to sail at the age

of eight, like me, sailing enters your bones,†said Mr Stolberg. “And you

get

a feel for the wind, its power.â€

 

WIND POWER USED PROFITABLY

_http://www.skysails.info/index.php?L=1_

(http://www.skysails.info/index.php?L=1)