including an in-house developed support tool for “opti-ballast” that utilises the results from extensive opti-trim tests and optimises the amount and location of ballast to re- duce the resistance, considering the actual tank arrangement, stability and strength)
- Improved Performance Monitoring and Analysis (joined SPA-JIP in 2006, running internal project during 2009 that aims to develop a systematic performance monitoring procedure including reporting templates, analysis tools and follow-up presentations)
When it comes to NOx emissions Wallenius already started installing low NOx sliding valves on its main engines in 2000 and completed the installation in a few years. Additionally, the company is installing WetPac. This humidifies the scavenger air on the auxiliary engines reducing NOx emissions significantly.
To reduce SO2 emissions Wallenius runs its main engines on low sulphur bunkers with an average sulphur content below 1.5 % and auxiliary engines on diesel oil with a content below 0.2 %. In the longer-term, Wallenius is looking at alternative fuels such as LNG. “Our vision is to build an emission-free vessel,” he adds.
There are still several challenges to be overcome, he emphasises. For instance,
although numerous paint makers claim reductions in resistance, established figures still seem to be missing. Wallenius there- fore, welcomes research in this field and he adds, “we think MARIN has the knowledge and experience for the task”. The most accurate way to determine the effect of propeller and hull fouling is probably to perform controlled in-service sea trials on a few sister vessels over a docking period of three to five years, he says, preferably using different anti-fouling systems.
Emissions-free vessel In 2004, Walle- nius and WWL also designed the concept vessel Environmentally Sound (E/S) Orcelle, that has since become Wallenius Marine’s vision and inspiration in all environmental projects. Orcelle is being used for a feasibi- lity study which the company believes will lead to an emissions-free vessel. “It will present new technologies and their applica- tions that should enable us to achieve our goal. We believe that the way forward is in utilising the energy that already exists and which is free, namely solar, wind and wave energy. It is probably not enough to propel a ship at the usual speed, so we will have to take other forms of energy onboard as well but these energy forms will have to be emission neutral.” But Lögdström stresses: “However, we doubt that the emission problem is completely solved on a voluntary basis and therefore,
we welcome stricter environmental regula- tions for the shipping industry. Wallenius believes that shipping is by far the best way of transporting goods but there are still a lot of areas for improvement.” For a complete overview of Wallenius’ environ- mental measures taken and other information please refer to
www.walleniusmarine.com.
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