Cruise Ship Technology: Azipod Efficiency Gains 2%

Friday, January 20, 2012
Azipod with X-tail and optimized fin. (Photo: ABB)

One of the original creators of podded propulsion solutions -- a technology routinely featured on the world's largest cruise ships -- for the maritime market announced another breakthrough which improves efficiency further. ABB reports that recent modifications to its Azipod propulsion unit frame design have seen hydrodynamic efficiency improved by more than two percent. The modifications include a newly optimized Azipod fin shape and a new pod cap structure, called Xtail. The revised fin structure receives water flow from the propeller at a new, less acute angle, and its new curved design redirects the flow more efficiently. The unit’s new X-tail, installed for the pod cap structure, straightens water flow on ejection from the Azipod propulsor, minimizing water swirling.  Royal Caribbean International’s Radiance of the Seas was the first cruise ships to benefit from the new fin shape and X-tail. The modifications to Azipod were completed during its drydock visit in May 2011. Her sailings from May to September witnessed the benefits when compared to a sister vessel and her previous operational portfolio: more than 2 percent in hydrodynamic efficiency improvement was achieved.

Based on the positive result from the test, ABB will now include its new features in new Azipod XO units and provide refitted services to existing vessels equipped with older Azipod VO and XO units.
At the beginning of 2011 ABB together with Eniram introduced Azipod Dynamic Optimizer (ADO), a software tool which optimizes the Azipod toe angle. The tool has helped to improve unit efficiency and initial results from the trial installation on Holland America Line’s Noordam indicate that 1.5 percent savings may be achievable on this vessel.
When the Azipod propulsion system was first introduced to the cruise market in 1990s, around an eight percent rise in efficiency was recorded compared to existing ships, in terms of shaft line efficiency, according to the manufacturer. After that, step by step improvements were made to the Azipod shape, resulting in about another seven percent efficiency improvement. Two years ago, when ‘next generation’ Azipod - Azipod XO units were launched, another two percent improvement was achieved. Thus combining this to the recent improvements, Azipod hydrodynamic efficiency has totally been improved by more than 12 percent compared to the first cruise vessel application.
To date, over 100 vessels have been equipped with Azipod propulsion units and more than 240 Azipod units have been delivered or are on order.
 
Maritime Reporter May 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Construction Starts on Crowley’s 2nd LNG ConRo Ship

Construction begins on Crowley’s second Commitment Class, LNG-powered ConRo ship for use in the Puerto Rico trade   Shipbuilder VT Halter Marine, Inc. has officially

UKHO ‘Living with ECDIS’ Seminars at Nor-Shipping

Seminar to include information on updated IHO ENC Standards   The United Kingdom Hydrographic Office (UKHO) has announced the details of its free-to-attend ECDIS Seminars at Nor-Shipping,

New Launches, Demonstrations Set for Seawork

Europe’s commercial marine and workboat exhibition held in a working port, Seawork International, has released its plans for demonstrations, launches and conferences.

Marine Propulsion

Shell Offers Smooth Transition to ECAs

Shipowners switching to low sulphur content fuels in line with their obligations in Emissions Control Areas (ECAs) have demanded confidence in the cylinder oils

Construction Starts on Crowley’s 2nd LNG ConRo Ship

Construction begins on Crowley’s second Commitment Class, LNG-powered ConRo ship for use in the Puerto Rico trade   Shipbuilder VT Halter Marine, Inc. has officially

Mercury Marine Begins HQ Expansion

Mercury Marine announces 45,000 square foot EDP parts expansion to Fond du Lac global headquarters   Mercury Marine will add a 45,000 square foot expansion to

Cruise Ship Trends

Star Clippers to Build Massive Square Rigger

Tall ship sailing specialist Star Clippers has announced that it has started building a fourth ship to add to its fleet of graceful square-riggers; its first new-build

Roxtec Sees Rise in Cruise Ship Repair Work

Manchester cable safety seal manufacturer Roxtec has reported increased demand for its cruise ship cable and pipe seals.   The firm has seen a 67 percent rise

Cruise-Container Hybrid Ship Makes Debut

Aranui 5, a cruise ship / container ship hybrid, will make its maiden voyage from Tahiti to the Marquesas Islands in the South Pacific Ocean at the end of November 2015.

 
 
Maritime Standards Naval Architecture Navigation Offshore Oil Pod Propulsion Port Authority Salvage Ship Repair Ship Simulators Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1935 sec (5 req/sec)