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

Technology

Liquefaction Terminals to Dominate LNG Capital Expenditure

Capital expenditure (Capex) on global LNG facilities is expected to total $259 billion (bn) over the period 2015-2019, with investments expected to be 88% larger

Ennsub Delivers ROV Deployment Systems

Ennsub has completed the design and manufacture of two workclass remotely operated vehicle (WROV) deployment systems for ROVOP, due to be installed into a newbuild

Wärtsilä to Proceed with first LNG Terminal

Wärtsilä has been given full notice to proceed (NTP) from Manga LNG Oy for the supply of a liquefied natural gas (LNG) import terminal in Tornio, Northern Finland.

Marine Propulsion

Keeping to the Schedule in the Pacific Northwest

When a tightly scheduled repower for the Kodiak-based trawler Sea Mac in early December took a very bad turn, Mike Fourtner used his 25 years of fishing experience

New Chinese Shipyard Launches First Ship

The new shipyard facility of Honghua Offshore Oil & Gas Equipment Company in Jiangsu, China, has launched its first ship, an IMT982 Platform Supply Vessel. The vessel,

Multraship Buys Three More Tugboats from Damen

Multraship and Damen Shipyards Group agreed on three new ASD (Azimuth Stern Drive) Tugs, all for delivery to Multraship in 2015. After delivery in Vietnam, scheduled

Cruise Ship Trends

Port of Houston Expecting Record Year

The Port of Houston Authority is expecting 2014 to close as a banner year for the port, with 34 million tons of cargo handled through November, Executive Director

Duffy Named President of Carnival Cruise

Carnival Corporation & plc., the world’s largest travel and leisure company, today announced that Christine Duffy has been named president of Carnival Cruise Line,

Fincantieri Wins Carnival Cruise Ship Order

Fincantieri SpA has been awarded an order by Carnival Corporation & plc for the construction of two new cruise ships for Carnival Cruise Line and Holland America Line.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Navigation Pipelines Pod Propulsion Port Authority Ship Electronics Ship Simulators Shipbuilding / Vessel Construction
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: 0.1500 sec (7 req/sec)