01-01 are azimuthing ships different - gylden...azipod propulsion • there was very limited...

© Gylden Propulsion Systems 23 October 2017 | Slide

ARE AZIMUTHING PROPULSION SHIPS DIFFERENT?

DIESEL ELECTRIC AZIMUTHING PROPULSION SHIPSOPERATION AND HANDLING


ARE AZIMUTHING SHIPS DIFFERENT?

• Yes, they are! • Safe and efficient handling of a ship with azimuthing

propulsion compared to a conventional vessel requires a different set of – knowledge, – skills and – competences

• Why?


AZIMUTHING PROPULSION

• Azimuthing thrusters/propulsion is still new – Introduced in 1950s primarily to smaller ships

• First systems were mechanical • Most systems today are mechanical – Output power limited generally to below 5 MW • Due to heat generation in gears

Photo: Rolls-Royce / Hollming Oy


AZIPOD PROPULSION

• In 1980s ABB Marine developed diesel electric system – the Azipod® (registered trademark of ABB)

• Electric Azipod can deliver higher power than mechanical systems – Up-to 25 MW – Azimuthing propulsion for large ships was possible

• First Azipod cruise ship installation 1998 – M/V Carnival Elation


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CRUISE SHIP AZIMUTHING PROPULSION

• In 1998 best utilization of the system was not clear – For example, Carnival Elation, and several following

vessels, were equipped with only one (1) azimuthing lever to control two (2) Azipods

– Lots of the benefits of the system could not be reached with this setup


PRE-SET FOR CRASH STOP


AZIPOD PROPULSION

• There was very limited training, if any • Captains needed to develop their own azimuthing

ship handling methods – Some of the methods were correct • Others not so good

• These methods were passed on to other Masters


TO FULLY UTILIZE AZIPODS

• One has to have good understanding of – Technical system • Capabilities of Azipod propulsion • Principles thrust vector-thinking • Bias-setting of Azipods

– Nautical operations • Recommended operating methods are to be promoted

– Others should be dismissed


BIAS-SETTING: IN 30 – IN 60

Picture: ABB Marine


AZIPOD MANEUVERING

• Conventional ship handling methods are not applicable

• Azipod methods give broader envelope for safe and efficient maneuvering

• Azipod ships are (much) more maneuverable • Azipod ships have brakes – i.e. stopping distance up-to 50% shorter


IMPROVED UTILIZATION IMPROVED EFFICIENCY

• Both Nautical and Technical knowledge, skills and competence are required to fully utilize the system

• Results from Azipod specific operational training: – Improved • Safety • Efficiency and total economy • Passenger comfort/satisfaction

– Lowered propulsion system maintenance needs

01-01 are azimuthing ships different - gylden...azipod propulsion • there was very limited...

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