In the years ahead, ten highly versatile IMOIIMAX tankers will be built. The 183 meter vessels, with a load capacity of 54,000 m3, are expected to be among the most energy-efficient and environmentally friendly in the world. Stena Impression, the first in the series, is scheduled for delivery in autumn 2014.

Stena Teknik

Innovations for efficiency and safety

Stena Teknik is a unique technological resource for the marine parts of Stena. Thanks to the vast and broad-based knowledge of its employees, the company can develop solutions that make the business areas more competitive.

In 2013, two Suezmax tankers were delivered from Samsung Heavy Industries’ shipyard in South Korea. The vessels, which were delivered on budget and on time, are operated by Stena Bulk and included in the Stena Sonangol Suezmax Pool. The two are the last in a series of seven “sisters”.

These highly fuel-efficient vessels are equipped with an optimised propulsion system. Together with increased efficiency – thanks to fins, propellers and rudder bulbs, among other things – this reduces bunker consumption by 8%.

During the second quarter 2013, construction of ten product tankers began in China. Estimates show that these new so-called IMOIIMAX tankers will be 25% more fuel-efficient than previous generations of tankers of similar size. Furthermore, IMOIIMAX offers significantly higher load flexibility. The first vessels are scheduled for delivery in 2014. The project was initially overseen from Göteborg, but when construction began an inspection office was opened at the shipyard as well.

Two semi-submersible drilling rigs were ordered in the summer of 2013. The rigs are designed to handle the tough conditions of the North Sea, a harsh environment in terms of rig movements and positioning. The North Sea also has the most stringent regulations in the world on safety and working environments on board. Construction of the units begins in 2014, and they are scheduled for delivery in 2016.

Research, development and innovation

The International Maritime Organisation’s (IMO) sulphur directive for Northern Europe, which limits the sulphur content of marine fuel to 0.1%, has forced the industry to find alternatives to offset the cost increases. One of Stena Teknik’s projects involves using methanol as a fuel. The project, on Stena Scanrail, was completed in 2013. Conversion to methanol operation is associated with significant investment. Stena has received support to pay half the cost of a conversion of Stena Germanica from the EU’s Trans-European Transport Networks (TEN-T). The funds will be used not only to convert Stena Germanica but also to design a distribution system for methanol.

Together with its partners, Stena Teknik has strongly contributed to the drafting of international rules on fuels with low ignition temperatures.

Stena Teknik has also developed an anchoring system that enables drilling vessels to operate in shallow depths of 50–150 meters. The system, which allows the vessel to rotate, enables the vessel to connect and disconnect in a controlled way. Stena Teknik has patented the system, which has attracted considerable interest in the industry.

Technical Director Comment

The focus in 2014 is on monitoring our newbuildings, so that they are delivered as planned. Another priority is energy efficiency, where the annual target is an improvement of 2.5%. Stena Teknik has drafted a vessel-specific action plan for Stena Line’s fleet to reduce bunker consumption. The plan for 2014 is to eliminate about 10,000 tonnes of HFO (Heavy fuel oil). Stena Teknik has recruited a Performance Manager to monitor the vessels’ fuel consumption and suggest additional measures.

Harry Robertsson

Technical Director Stena Teknik

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