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

Marine Propulsion

Sanamar Launches 3 Tugs from New Yard

Sanmar’s new custom-built, general purpose shipyard at Altinova, Turkey, has launched three 60-metric-ton bollard pull tugs on the same day, less than five months since work first started at the yard.

Propulsion Under Wireless Remote Control

Thrustmaster of Texas, Inc. has been supplying wireless remote controls for thrusters since the 1980s, offering products that are supported through their lifecycles

Jotun to Update Performance Guarantees

The 17 National Standardization Bodies represented on ISO’s Marine Environment Protection Sub-committee (ISO-TC8-SC2) has voted in favor of circulating ISO 19030

Tanker Trends

COSCO Receives Fund for Fleet Renewal

China COSCO Holdings Co Ltd says it has received ship scrapping subsidies for about 3.96 billion yuan ($638.71 million).    It came through China Ocean Shipping,

Team Tankers Appoints Hans Feringa as President and CEO

Team Tankers International Ltd has appointed Hans Feringa as new President and CEO. Feringa is the former President of Stolt Tankers, a division of Stolt-Nielsen Limited.

DryShips Sells Six Aframax Tankers

Dry bulk and petroleum cargo shipper DryShips Inc., through its majority owned subsidiary, Ocean Rig UDW Inc. of offshore contract drilling oil services, announced

Environmental

Shell Steps Closer to Arctic Drilling

The U.S. Fish and Wildlife Service authorized the nonlethal, incidental, and unintentional take of small numbers of polar bears and Pacific walrus that result

US Issues Potential Setback to Shell's Arctic Drilling

The Obama administration issued a potential setback to Royal Dutch Shell's  Arctic oil exploration plans on Tuesday, telling the company that established wildlife

Ex-BP Engineer Deserves New Gulf Spill Trial -US Appeals Court

A former BP Plc engineer deserves a new trial on an obstruction of justice charge related to the 2010 Gulf of Mexico oil spill, a federal appeals court ruled on Tuesday.

Naval Architecture

Sanamar Launches 3 Tugs from New Yard

Sanmar’s new custom-built, general purpose shipyard at Altinova, Turkey, has launched three 60-metric-ton bollard pull tugs on the same day, less than five months since work first started at the yard.

Evergreen Names Penultimate L-type Containership

A naming ceremony was held for the Evergreen Group’s newest containership, Ever Lovely, the ninth of its L-type vessels to be built by CSBC Corporation in Taiwan

ShipServ opens Singapore office

ShipServ, the leading marine and offshore marketplace with an expected annual trade of $3bn in 2015, has cemented its position in Asia with the opening of a new office in Singapore.

Vessels

Meyer Turku Wins TUI Cruises Order for 2 Ships

TUI Cruises GmbH and Meyer Turku Oy signed an agreement for two cruise ships. This order further strengthens the order book of the shipyard, which contains now a high work load until the year 2020.

Samsung Bags $4.7bn Order for 3 FLNG from Shell Gas

South Korean shipbuilder Samsung Heavy Industries Co. as won a 5.2 trillion won (US$4.7 billion) order to build three floating liquefied natural gas (FLNG) facilities, reports Yonhap.

Cargoship Disabled and Grounded in Dardanelles

General cargo vessel Ibrahim Konan  (7,618 dwt, built 2008) today (July 1) suffered rudder failure and ran aground in Dardanelles in front of Eceabat in Turkey,

 
 
Maritime Contracts Maritime Security Navigation Pipelines Port Authority Salvage Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction
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: 0.1717 sec (6 req/sec)