Wärtsilä Launches Efficient New Aframax Tanker Design

Press Release
Monday, October 22, 2012

Wärtsilä, a marine industry's solutions and services provider, has launched 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.


Wärtsilä X62 engine


The Wärtsilä X62 is the most compact engine in its class of very low-shaft-speed engines. Thanks to the engine's agility, it is the optimum choice for several vessel segments. The Wärtsilä X62 has a cylinder bore of 620 mm and its power output is in the 8,000 to 21,280 kW range. It comes in 4 to 8 cylinder configurations.


Aframax tanker:
Length over all, approx    253.20 m
Beam    44m
Max draught    15.2 m
Carrying capacity                            abt. 117,000t dwt
Net cargo    abt. 134,250m3 in 12 cargo tanks
Loading/discharge rate at the manifold    9000m3/hr
Bow loading system    8000m3/hrs

Maritime Reporter March 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

Palfinger Chooses NAMJet Waterjets

Netherlands-based Palfinger Boats has launched the first of two Damen-designed FRSQ 1200 fast-rescue/oil response vessels.   Built in Harderwijk, Netherlands,

ABG Ties Up with GTT for LNG Technology

ABG Shipyard Ltd has tied up with Gaztransport and Technigaz (GTT) of France for the maritime transportation and storage of liquefied natural gas (LNG), reports Livemint.

Methanol Powered Ferry Launched in Baltic Sea

Swedish ferry operator Stena Line has announced that it has converted the Stena Germanica to run on methanol, an industry first.   The company spent $24 million on converting the ship to methanol.

Tanker Trends

Shipping Confidence Hits 2.5 Year Low

Overall confidence levels in the shipping industry fell to their lowest level for two-and-a-half years in February 2015, according to the latest Shipping Confidence

DryShips to Sell its Suezmax Tanker Fleet

DryShips Inc. (NASDAQ: DRYS), has announced  that it has entered into firm sales agreements with entities controlled by the Company's Chairman and Chief Executive Officer,

India Halts Iran oil Imports Under U.S. Pressure

Oil imports from Iran at 220,000 bpd in year to March 31. U.S. pressured India not to raise annual Iran oil imports. India halted oil imports from Iran for the

Environmental

H2O’s Owens CrapZapper Offers More

H2O’s Owens CrapZapper marine sanitation device has dual certification to the latest IMO and USCG standards for operation anywhere in the world.   Features include low maintenance,

HEADHUNTER Marine Sewage Treatment Systems

Headhunter’s team of engineers, fabricators, and wastewater specialists work together to provide innovative and efficient sewage treatment solutions.   Offering systems in three categories; STP,

U.S. Submits Formal Plan for Paris Climate Talks

The United States on Tuesday formally submitted its climate change strategy to the United Nations, outlining domestic measures it is taking to achieve up to a 28

Naval Architecture

All American Marine Delivers Ferry to Seattle

All American Marine, Inc. (AAM) today announced the delivery of a new passenger ferry that will serve the city of Seattle.    The vessel, MV Sally Fox, was dedicated

SCI takes Delivery of VLCC "Desh Vibhor"

The Shipping Corporation of India Ltd. (SCI) accepted delivery of a Very Large Crude Oil Carrier (VLCC) on 28 March, 2015. The vessel has been named “Desh Vibhor”.

VIKING LifeCraft Presented at IMO

This week, VIKING Life-Saving Equipment took a step towards gaining approval for the VIKING LifeCraft, its alternative life-saving appliance (LSA) for passenger ships.

Vessels

World's Largest Ship: Pioneering Spirit Awaits Completion

Final construction aboard the world’s largest vessel, Pioneering Spirit (formerly named Pieter Schelte), is wrapping up in the Port of Rotterdam before the vessel

Shipping Confidence Hits 2.5 Year Low

Overall confidence levels in the shipping industry fell to their lowest level for two-and-a-half years in February 2015, according to the latest Shipping Confidence

DryShips to Sell its Suezmax Tanker Fleet

DryShips Inc. (NASDAQ: DRYS), has announced  that it has entered into firm sales agreements with entities controlled by the Company's Chairman and Chief Executive Officer,

 
 
Maritime Security Maritime Standards Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Port Authority Shipbuilding / Vessel Construction 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: 0.1373 sec (7 req/sec)