environmental award
Innovative newbuild will be kind to the environment
The Bluedrive Plus C concept will make Edda Ferd one of the most environmentally friendly PSVs in the world
The annual
shortlist
for
the
environmental
award included: • Eidesvik for the battery energy storage system it announced it would be testing on one of its vessels • Harvey
Gulf conference & awards International Marine
for
its liquefied natural gas (LNG)-powered newbuilds, the first LNG-powered vessels in the Gulf of Mexico • Østensjø Rederi
for Edda Ferd, which has Winner Environmental Award
Østensjø Rederi in Norway has a longstanding commitment to building technically sophisticated, environmentally friendly vessels, a commitment that is exemplified by winning the Environmental Award for Edda Ferd
T
he environmental award in the OSJ awards is awarded to a company, project or product that has made a significant
contribution to a reduction in the environmental footprint of the offshore support vessel industry. This year, the award was sponsored by GE Power Conversion.
a new type of fuel-efficient, environmentally friendly diesel-electric propulsion system, and • Power Catamarans for the Powerglide 46, a catamaran designed to transport engineers to offshore windfarms. Østensjø Rederi, the winner of the award, has a history of innovation, and was among the first to introduce features such as dynamic positioning, high cargo railings and an enclosed stern, drill cutting tanks and Voith Schneider propulsion on platform support vessels (PSVs), many examples of which have since been adopted by others.
This approach to innovation is exemplified by its latest new project, the PSV Edda Ferd, a Skipsteknisk 920 design built by Astilleros Gondan in Spain, and is due to be delivered shortly. The vessel has what will be the first example of a unique type of diesel-electric propulsion systems, developed in association with Siemens which, it is claimed, will significantly reduce fuel consumption and reduce emissions. The development of this highly advanced, environmentally friendly design is
30 I Annual Offshore Support Journal Conference and Awards 2013
part of Østensjø’s ‘Mindset’ programme. In the mid-1990s, Siemens was one of the first companies to introduce electric propulsion for offshore vessels based on the latest developments in power electronics. After successful implementation in the offshore vessel Skandi Marstein,
electric
propulsion systems grew in popularity. In the years afterwards, Siemens pushed the technological limits further by developing new products that increased shipowners’ profitability. These included several concepts designed to enhance operational performance.
By 2000, Siemens was ready to tackle the challenge of optimising high speed diesel engines in the complete electric propulsion plant. The key issue was a low moment of inertia, which made it hard to adjust generator voltage. In turn, this led to generators ‘hunting’ for reactive power from one another. (Reactive power is power that flows back and forth between a generator and motors/ transformers, which are part of the electrical load. This power does no useful work in the electrical load or present load to the engine, but does apply load to the generator and limits the capacity of
the generator). A second significant issue
was vibration. As part of an electric propulsion plant, the engines’ vibrations caused a number of problems, such as fatigue fractures in the common base-frame of the engine and generator, broken bolts and damaged bearings. The answer, Siemens felt, was the development of new technology that slowed down the speed of the diesel engine when low power was required.
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