New Tankship Design by Wärtsilä

Press Release
Monday, October 22, 2012

Wärtsilä launch a new, highly efficient Aframax tanker design that offers solutions for current and forthcoming emissions legislation.

Wärtsilä Ship Design has developed a double hull, single screw crude oil tanker featuring a CFD (Computational Fluid Dynamics) optimised hull to provide less resistance with higher propulsion efficiency. The minimum time at the terminals is ensured by the high loading/discharge rate. The CFD optimisation of the hull form has carefully considered the flow lines and pressure distribution along the hull, while the cylindrical bow accommodates a range of operational draughts even in rough weather conditions.

The propulsion system is based upon the high performance, 2-stroke Wärtsilä X62 main engine. This electronically controlled, common-rail engine has an extra long stroke and low rpm. It also has a minimised physical width to allow a slimmer aft body design, which further benefits the propulsion efficiency.

Compared to currently available main engine options, the Wärtsilä X62 engine can achieve fuel savings of seven per cent on the specific vessel design. Furthermore, the same vessel speed can be reached using one less cylinder, i.e. six instead of seven cylinders. The seven cylinder version provides even greater efficiencies due to the lower rpm and higher de-rating.

For emissions compliance, an integrated Wärtsilä exhaust gas scrubber has been placed on the funnel. Main engine, auxiliary engines and auxiliary boilers are all connected to the integrated scrubber. The scrubber effectively reduces sulphur oxide (SOx) emissions, and meets the 0.1 percent sulphur limit even with HFO (Heavy Fuel Oil) having a sulphur content of 3.5 per cent.

A Wärtsilä SCR (Selective Catalytic Reduction) system has been placed before the turbocharger turbine for the main engine. The SCR is a post combustion nitrogen oxides (NOx) abatement system that permits optimised combustion, in terms of efficiency, while reducing NOx emissions by more than 90 per cent. The abatement equipment is tuned with the main and auxiliary engines for effective operations across the complete load range and IMO Tier III requirements can be fulfilled.

“The new realities of the shipping industry call for higher fuel efficiency, lower operating costs, and better environmental performance. The new Wärtsilä Aframax tanker design meets all these criteria, and we are proud to offer this segment the combination of state-of-the-art design and superb propulsion machinery that can produce meaningful savings,” says Riku-Pekka Hägg, Vice President Wärtsilä Ship Design.
 

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

Shipbuilding

MacGregor Wins RoRo Cargo Access Equipment Order

MacGregor has won an order from Daewoo Shipbuilding and Marine Engineering (DSME) in South Korea for the design and delivery of MacGregor RoRo cargo access equipment.

World’s Largest Fast Crew Boat Christened at Incat

The 70-meter Fast Crew Boat (FCB) was christened Muslim Magomayev at a ceremony at the Incat shipyard on Monday, September 15. This is the first vessel that

Aiming to Make Less Fuel Go Further: Maersk Drilling

Maersk Drilling says it is engaged in an energy efficiency project for its newbuilds together with Maersk Maritime Technology. The project involves an Energy Management System (MSPS),

Tanker Trends

For Europe's LNG Ports, Russia Gas Fears and US Exporters Buoy Demand

Gas buyers nervous of Russia cutting supply are helping solve Europe's problem of too many underused liquefied natural gas (LNG) terminals, as they seek space at France's Dunkirk plant.

Buckeye Pipeline Quietly Makes Key Acquisition

Houston-based logistic firm Buckeye Partners has spent more than $3.5 billion buying assets since 2010, transforming itself from a quiet regional pipeline utility into an emerging energy powerhouse.

Scorpio Tankers Receive 7 More Newbuildings

Scorpio Tankers Inc. say it has recently taken delivery of seven newbuilding vessels as follows: STI Madison and STI Park, LR2 product tankers, were delivered

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Navigation Pipelines Salvage Ship Electronics Shipbuilding / Vessel Construction 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: 0.2150 sec (5 req/sec)