Putting a harness on ocean winds, a German shipping company plans to
unfurl a giant high-tech kite over a cargo ship next year to boost the
vessel's propulsion and to conserve fuel.
The "SkySail", a 160 square-metre (191 square-yard) kite tethered to a
mast, has successfully undergone years of trial runs and Bremen
shipowner Beluga Shipping believes it will help its vessels cut fuel use
by 15 to 20 percent.
The "MV Beluga SkySails", now being built and fitted with a
paraglider-shaped sail and a "smart" central steerage unit, will make
its maiden voyage in early 2007.
"I got the idea on a sail boat a few years ago," Stephan Wrage, inventor
and founder of SkySails GmbH & Co. KG, told Reuters. "I love flying
kites and found sailing rather slow. I thought the enormous power in
kites could somehow be utilised."
The technology he has developed is a throwback to an earlier age of
maritime travel when ships relied solely on wind. But it also addresses
a key concern of the modern age: climate change.
Backers of "SkySail" call it a "green" project -- by cutting fuel use it
could help reduce emissions of the greenhouse gases blamed for global
warming.
Wrage, 34, said that depending on the vessel and the winds, fuel costs
for shippers could be cut by more than US$1,000 a day.
After four years of successful tests, it is anything but a
pie-in-the-sky project.
The inventor first tested a prototype of the SkySail on a 3.5 metre
(11.5-foot) boat, then gradually increased the size of the craft before
testing it last year on a 55-metre (180-foot) vessel, the "Beaufort".
Making money with ecoogy
SkySail s price tag -- at between 500,000 euros and 2.5 million euros
(US$660,000 - US$3.3 million) -- along with doubts it will deliver
promised savings, and its reliance on fickle ocean winds could limit
demand at first.
Wrage said ships will initially need to carry an engineer to operate the
sail, which is about as big as a medium-sized passenger jet.
"It s going to save money in the long run and it's environmentally
friendly," said Verena Frank, project manager at Beluga, a shipping firm
with 40 vessels.
"We ve integrated the system into our new ship from the start of
construction but ships can also be retro-fitted," she said in an
interview in this windswept northern port city with a rich seafaring
tradition dating back to the 8th century.
"Ours will be the first commercial use in cargo shipping," Frank said.
"There will be some teething pains," she added.
SkySails can use powerful offshore winds between 100 and 300 metres
above the surface with the help of the high-tech control pod, but they
would be useless with head-on winds and would not benefit ships
travelling above 16 knots.
The sails are unlikely to make much of an immediate impact on the
overall fuel and environment problems facing shippers. Shipping carries
more than 90 percent of the world's traded goods. There are 30,000
merchant ships carrying everything from oil, gas, coal, and grains to
electronic goods.
Wrage has a staff of 33 and in 2007 expects to equip three more ships
with the SkySail. He projects 1,500 vessels will have the system by
2015, when he reckons he will have 800 employees.
"It was important for me to prove that you can make money working
hand-in-hand with nature and not against it," he said.
"I think there could be a lot more linking of ecology and economy."
Market forces
Beluga Chief Executive Niels Stolberg said market forces were the main
reason he decided to enter a partnership with "SkySails" in 2002. He
placed the first order almost a year ago.
He expects SkySails to cut the US$7,500 daily fuel costs of his cargo
ship by up to US$1,500. And he said the positive impact on the
environment was a welcome dividend.
"You ve got to look at new ideas to cope with developments in oil
prices," Stolberg said, adding it was not possible to pass along such
steep fuel prices to customers.
If SkySails works as expected, he plans to add the system one vessel at
a time.
"When energy prices double in such a short time, you ve got to innovate.
We won't be able to switch the engines off. But we're confident we can
reduce fuel usage -- and cut emissions."
He said his fuel prices have more than doubled from about US$150 per
tonne in 2004 to between US$300 and US$400 per tonne this year and he
fears prices may soon rise to US$450. Prices have, however, retreated
somewhat in recent months.
"We can t sit back and ignore the market pressures and wait until fuel
hits US$500," said Stolberg, whose nine-year-old firm ships everything
from giant turbine engines to locomotives for customers including
Siemens and General Electric.
On top of that, European Union restrictions on greenhouse gas emissions
threaten penalties for those who fail to act to curb them, and the heavy
fuels that ships use are deemed especially dirty.
"From the European Union point of view, you will have restrictions with
CO2 emissions and they'll fine you," said Frank. "You've got to find
ways to avoid that. As restrictions are coming, every shipper must
rethink their strategy."
(Por Erik Kirschbaum em colaboração com Stefano Ambrogi,
Planet Ark, 05/12/2006)