Hull and Propeller Optimisation

Last Updated: Apr 2012

Current trials

Gamma Light & Heavy Industries Ltd. in April 2012 introduced a new invention called The Gamma Propulsion System (TGPS) - a completely new method of propelling ships that is said to use about 25% of the energy consumed compared to using a traditional unshrouded propeller, while maintaining the same performance.

http://www.sustainableshipping.com/news/i112684/New_marine_propulsion_system_claims_75_efficiency_gain

Commercial Diving Services in Australia has developed a Hull Surface Treatment (HST) concept using a paint-free thermal shock technology.

http://www.sustainableshipping.com/forum/blogs/Chris-Geater/90802/Revolutionary-hull-fouling-solution

The US Navy started testing a silicone-based hull coating in 2009 as part of its Naval Sea Systems Command's Fleet Readiness Research & Development Program (FRR&DP) Underwater Hull Coatings initiative. It expected that applying the coating to 70 ships could save $12.6 million in annual fuel costs.

http://www.sustainableshipping.com/news/i88768/New_hull_coating_seeks_significant_fuel_savings

An anti-fouling slow release paint using copper acrylic and a proprietary polymer compound has been tested by Nippon Paint Marine Coatings and the company says it will improve fuel efficiency by 4%.

http://www.sustainableshipping.com/news/i86919/Orders_stack_up_for_Nippon_special_hull_paint

Propulsion Dynamics has hundreds of ships in long term contracts for its CASPER service (hull resistance management) with a number of shipping companies, including Norden Tankers, Teekay Tankers, and Seaspan Ship Management.

http://www.sustainableshipping.com/news/i89834/Teekay_gathers_invaluable_emission_and_fuel_data

http://www.sustainableshipping.com/news/i71588/APL_monitors_performance_to_boost_efficiency


DK Group says the Air Cavity System (ACS) Retrofit can be fitted in a dry dock and in most ship and repair yards in just 14 days.

http://www.sustainableshipping.com/news/i92116/Fuel_saving_air_cavity_system_can_be_retrofitted

NYK and Mitsubishi Heavy Industries have announced a collaboration on an air-lubrication system.


http://www.sustainableshipping.com/news/i91994/NYK_and_Mitsubishi_s_CO2_reduction_technology_bubbles_away


Kongsberg Maritime and Becker Marine Systems launched a support tool in May 2011 designed to enable more efficient use of propellers and rudders during Dynamic Positioning (DP) operations.

http://www.sustainableshipping.com/news/i103641/Technology_allows_high_performance_in_manoeuvring

Costs

Costs vary depending on the technology used and the dry dock time required for modifications or an increased hull/propeller cleaning frequency. With fuel oil bunker costs at around $450 per tonne in the middle of 2010, each percentage point of daily fuel savings can equate to approximately 0.5 tonnes of fuel (and a reduction of 2 tonnes of CO2), or $225 per ship per day in reduced fuel costs.

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