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5% Fuel Saving Experiences on 1,900 ships. Adopted by more than 200 owners and operators.


automotive liquefied petroleum gas (LPG) refueling and takes less than 10minutes. The gas installation is safety approved by Germanischer Lloyd. Completing the target of zero emissions, the hydrogen fuel is produced by electrolysis, using electricity generated from a windfarm in the North Sea.


Hydrogen-diesel electric hybrid tug A hybrid propulsion system using a hydrogen-powered fuel cell and diesel- electric generators is planned by Canadian tug owner Seaspan International Ltd of Vancouver for introduction in 2012. Working with Capilano Maritime


without PBCF


Design Ltd, Lloyd’s Register North America Inc, and Ballard Power Systems, the design of the new tug is based on an azimuth stern drive (ASD) ship-handling tug class already in use in Vancouver. The tug has two fully azimuthing fixed-pitch propeller (FPP) propulsion units, each powered by a 1800kW electric


hub vortex


The PBCF has been developed and commercialized in 1987 by the corporate group centered in Mitsui O.S.K. Lines, Ltd.. PBCF is the originated device to be focused in the recovery of energy from the flow out energy in propeller hub vortex. Its fundamental mechanism and effects have been repeatedly verified through numerous series of model tank tests and actual ship measurements from the first stage of the development. The 5% energy saving effect has been presented on numerous occasions at academic association meetings both in Japan and overseas, and this has been well accepted both in Japan and overseas.


Basic principle of PBCF effect As the flows accelerated down after the blade trailing edges are blocked and rectified to a straight ship-stream by the fins of the PBCF, the hub vortex will be eliminated.


with PBCF


MS PlanetSolar in Hamburg harbour preparing for its circumnavigation. (Credit: Keith Henderson).


PBCF has been kept contributing energy saving for the vessels in worldwide, and is an global environment-friendly technology.


motor. Three possible sources can deliver electrical power together or in combination: hydrogen fuel cells, battery banks and diesel generator sets. Four marinised versions of Ballard Power’s standard 150kW (each)


E-mail:pbcf@motech.co.jp URL:http://pbcf.motech.co.jp/


automotive fuel cell units will operate on hydrogen to provide electrical power for the drive motors or charge the batteries. A shore power connection is available


for battery charging when the tug is idle. Te tug will operate entirely on electrical


Ship & Boat International November/December 2010


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Feature 4


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