SEPTEMBER 5, 2016—Deltamarin Ltd is to provide Finnish shipbuilder Rauma Marine Constructions Oy(RMC) shipyard with design services for the RoPax ferry recently ordered by Denmark’s Mols-Linien A/S (see earlier story). The vessel
A new multigas carrier design uses the successful B. Delta bulk carrier hull from Finland’s Deltamarin to carry gas in new-generation cylindrical gas tanks developed by Vard affiliate Brevik Technology AS.
The design can be utilized for LNG, LPG, LEG and ethane carriers.
“Up to now gas carriers have been complex and expensive to design and construct. This is not the case anymore as Brevik Technology has developed cylindrical steel tanks, which are separate from the vessel hull,” says Brevik Technology’s Managing Director Øystein Kristoffersen Sæther.
Brevik Technology’s independent gas carrying method challenges the traditional and expensive way of building the vessel and the tanks as one entity. The patented containment design has already been approved by classification societies.
The cylindrical tank design allows the tanks to expand in all directions without putting stress on the vessel hull. The independent containment system, which can be built into a vessel as is, results in better possibilities to utilize the existing well-proven ship design.
“This is where the shipowner can get significant benefits by choosing a readily available and highly efficient B.Delta hull design already proven in operation”, says Deltamarin’s Managing Director Mika Laurilehto.
The design based on the B.Delta is actually a bulk carrier design equipped with cylindrical tanks for the gas cargo.
“As a bulk carrier, the vessel is easier and cheaper to build compared to a traditional gas carrier, and there may be many new potential shipyards capable of constructing such a vessel,” says Mr. Laurilehto.
The new design is now available for the market for smaller-scale gas carriers of 31,000 cu.m, with similar designs for medium- and larger-scale vessels to follow.
The design will also be available for retrofit vessels, such as the conversion of a bulk carrier to gas carrier.
The concept ship combines Deltamarin’s expertise in affordable, energy efficient cargo vessels with Aker Arctic’s arctic vessel expertise to deliver cost efficient and reliable tanker operation both in open water and in ice.
The Arctic Aframax tanker is intended for crude oil and oil product transports. It is strengthened to ice class PC5 level (equals approximately Russian Maritime Register of Shipping category ARC6) and is capable of continuously breaking thicker than one-meter level ice.
It can operate on the Northern Sea Route during the extended summer months, and with assistance even longer. During the winter months the vessel can operate in other sub-arctic sea areas such as the Baltic Sea or Sakhalin.
Deltamarin’s experience in designing cost efficient cargo vessels with track record of hundreds of contracted vessels is utilized in minimizing the newbuilding and operating costs.
According to Deltamarin’s Director of Ship Design, Markku Miinala, and Aker Arctic’s Project Manager, Riku Kiili, “the design integrates optimized ice breaking and open water performance as well as the latest energy efficiency features applied together with the Polar Code requirements. This unique combination results in an affordable building and improved transport economy by cost efficient operation. The design can be fine-tuned according to the customer’s wishes.”
The bow and hull shape of the vessel combine the optimum balance of open water performance with icebreaking capabilities. The specially designed hull strengthening improves safety in operations in the arctic waters. The hull is equipped with an Ice Load Monitoring System, which measures ice loads from the hull and provides online support to the officers ensuring safe operations. The system will also help the shipowner in the long term by analyzing the data and creating information for the optimal operations. The emphasis has also been on winterization for cold climates in all aspects of the concept design.
The vessel is equipped with two CP-propellers and shaft lines directly coupled with slow speed diesel engines. The vessel can also be fitted to run on LNG with dual fuel engines. Further there is a possibility for two bow thrusters and shaft PTO/PTI (Power Take Off / Power Take In) systems. A special focus has been on developing an improved command bridge, where the new Aker Arctic ARC Bridge Concept was used. The visibility from the bridge is excellent in all directions and good ergonomics including access and passages to command posts is created.
Arctic Aframax 118,000 DWT Crude Oil Carrier
Main Dimensions:
Hull and Performance:
The ready-to-apply DeltaLinx design uses existing technologies to its full potential and integrates them into the smallest possible package, enabling the ferry to operate in small ports and congested harbors. The propulsion system utilizes LNG as fuel to eliminate SOx and to reduce NOX and CO2 in exhaust gases.
A large LNG tank below the car deck is designed for weekly refueling.
The vessel length of approximately 80 meters allows easy operations between smaller towns and congested ports. High-lift rudders and a bow thruster make maneuvering easy.
Reduced resistance and low wash are ensured by streamlined hull lines. To cope with rough weather along the route, an extensive freeboard in the bow area is provided. Additionally fin stabilizers ensure smooth sailing.
The spacious multipurpose passenger facilities allow for seasonal adjustments by operators. They are arranged on two decks and include a spacious restaurant and pub, a children’s area and small spa corner.
Inside and outside seating combined with an exclusive SkyRoom mean that the ferry is an exciting place in all weather conditions.
To make the vessel suitable for disabled persons, a passenger lift from the car deck is provided.
The main car deck can accommodate up to 82 cars (incl. partial mezzanine deck) or 16 trucks. The bow and stern ramp arrangement enables easy drive-through loading and unloading operations. The unobstructed main deck (exhaust casings at sides) also helps to smooth the cargo operations.
The ship’s main dimensions and watertight subdivision ensure compliance with SOLAS 2009 and the Stockholm Agreement. Lifeboats and Mass Evacuation System (MES) are installed onboard for full international as well as domestic voyages. A Man Overboard Boat (MOB) and rescue boats are also provided. Fire safety is ensured by proper fire zone arrangement and state-of-the-art fire-fighting equipment.DeltaLinx main dimensions
Length Lpp 73.10 m
Loa 80.40 m
Breadth B 18.00 m
Draft T 4.00 m
Height (car deck) H 6.75 m
Deadweight dwt 1,220 t
Cargo capacity lane meters 360 lm
cars only 82
trucks only 16
Passengers no. 800 persons
Service speed V 15 kn.
Total propulsion P 6,000 kW
Class notation: DNVGL 1A1 Car Ferry A MCDK COMF-C(2)V(2) E0 F-M NAUT-AW CLEAN DESIGN DG-P GAS FUELLED TMON PWDK
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