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Feature 2 | TANKER TECHNOLOGY


slow vessels. The challenge for the 12 ULYSSES partners is to find the optimum safe operating speed for large tankers and bulk carriers that will allow the ships to improve their energy efficiency enough to meet the requirements of new regulations. “The objective of ULYSSES is


to


demonstrate, through a combination of ultra-slow speeds and complementary technologies, that the efficiency of the world fleet can be increased to a point where the following CO2


targets are met: Before 2020, reducing greenhouse gas


emissions by 30% compared to 1990 levels. Beyond 2050, reducing greenhouse gas emissions by 80% compared to 1990 levels,” says the EC. Furthermore the EC says it is focusing


on tankers and bulk carriers because “these ship types produce 60% of the CO2 from ocean-going vessels.” Tankers and bulk carriers are similar in


design and operation, according to the EC and it feels that investigating these ships will give the best value for money in terms of the potential impact of the project.


Decrease in power to maintain 15knot speed for various tanker hull shapes.


“Additionally,


it


is more technically


challenging to reduce the speed of these ship types as they are relatively slow speed already and therefore it is expected that directional stability and other seakeeping issues will arise. However, the results of the project will be directly transferable to other ship types. To achieve these goals, it is expected that the target speeds will be: ‘Phase I - Existing vessel in 2020: ~10 knots ‘Phase II - New vessel built in 2020: ~7. 5 knots ‘Phase III - New vessel built in 2050: ~5 knots,” the EC said in a statement. NA


DTU Calculation of maximum speed for 100,000dwt tanker.


DTU 34 The Naval Architect March 2012


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