Mitsui O.S.K. Lines (MOL) has announced that Propeller Boss Cap Fins (PBCF), marketed by its group company MOL Techno-Trade (MOL Tech), have now been ordered for 3,500 vessels.
PBCF is an energy-saving device attached to the propeller of a vessel and breaks up the hub vortex generated behind the rotating propeller. MOL says PBCF will have energy savings of 3-5% compared to an identical vessel not equipped with PBCF, while higher fuel efficiency in turn cuts emissions of greenhouse gases (GHGs), reducing the shipping industry’s environmental impact.
MOL Tech, MOL, and Akishima Laboratories (Mitsui Zosen) Inc. have developed a new type of PBCG in 2017, which has already counted approximately 300 vessel installations. This upgraded PBCF features “a refined fin shape and height to further enhance its energy-saving effect,” according to a MOL press release.
PBCF can be installed on a propeller by bolt only and has no moving parts, which means there are no maintenance needs after the completion of the installation which makes it an ideal solution to enhance the fuel efficiency of in-service vessels.
PBCF was co-developed by MOL, West Japan Fluid Engineering Laboratory and Mikado Propeller, which is now named Nakashima Propeller. The PBCF system was introduced in 1987.
“The development team has also research on a hybrid version with other energy-saving devices like the Pre Swirl Fin and Energy-saving Rudder with Bulb Fins, and confirmed synergetic effects in a model test (Smart Wake Ship style), having similar wake flow to a full-scale ship,” says the shipping line
PBFC can support in-service vessels to increase their fuel efficiency and comply with 2023 January effective standards, which will mandate the same level of efficiency as newbuilding ships.
The carrier adds to its environmental and emission free business by initiating “ISHIN NEXT – MOL SMART SHIP Project” to support environmental conservation at sea and in ports all over the world and to ensure safe operation and reduce environmental impact.