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 October 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

ClassNK Approves Niigata Dual-fuel Engine Design

Classification society ClassNK has granted approval to the design of the new 28AHX-DF dual-fuel engine developed by Niigata Power Systems Co., Ltd. The new engine

Subsea Defense & the Changing Paradigm of Submarine Programs

Technology and dynamic mission profiles have driven change in the defense industry, Hydro Group Plc Managing Director Doug Whyte, explores the changing paradigm of submarine programs,

From Security to Efficiency Modern Vessel Tracking

More so than many other fields of business, the maritime industry is focused on cost, which in turn gives the appearance of being conservative towards technology.

Marine Propulsion

ClassNK Approves Niigata Dual-fuel Engine Design

Classification society ClassNK has granted approval to the design of the new 28AHX-DF dual-fuel engine developed by Niigata Power Systems Co., Ltd. The new engine

Karl Senner Inks Distribution Deal with Electronic Power Design

Karl Senner, LLC (KS) has reached a new strategic representation agreement with Electronic Power Design (EPD). Karl Senner, LLC now represents EPD in the United States marine and offshore Markets.

Seacor Takes Delivery of 10,800 HP Crewboat

Seacor Marine is building ever larger and more powerful mono-hull crew/supply boats. The first of these to be delivered is the 202x34-foot Alex F. McCall with some very impressive statistics.

Cruise Ship Trends

Norwegian Buys Ship from Princess Cruises

Norwegian Cruise Line Holdings Ltd. announces fleet expansion for Oceania Cruises in 2016; Sirena to join sister ships Insignia, Regatta and Nautica   Norwegian Cruise Line Holdings Ltd.

MSC Cruises Advance Onboard Wi-Fi System

MSC Cruises has started a fleet-wide optimization installed by Marlink to improve shipboard VSAT (Very Small Aperture Terminal) connectivity. MSC Cruises said it

Fincantieri Sign MoUs with Carnival & CSSC

Fincantieri, the world leader in the construction of cruise ships, has signed two memorandums of understanding, respectively with Carnival Corporation, the world’s largest cruise line,

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Naval Architecture Navigation Offshore Oil Salvage Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | 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: 0.1507 sec (7 req/sec)