DEME’s ambition to be at the forefront of the industry when it comes to innovative solutions can certainly be seen in its ambitious fleet investment programme.
A number of pioneering vessels – many of which are truly the world’s first – were launched in 2016 and they will enter the fleet in 2017. DEME’s vision for a cleaner and sustainable world led the company to take the decision to invest in dual fuel vessels, capable of running on LNG or diesel fuel, reducing carbon emissions, almost eliminating particulate matter, SOx and NOx.
When the total investment programme has been realised, DEME will be one of the very few shipowners capable of using LNG as a fuel at such a large scale.
The huge investment programme in greener vessels shows that DEME does not just want to meet current legislative requirements, it wants to exceed them and go beyond compliance. All of the vessels will have a Green Passport and a Clean Design notation.
The dredging fleet will be the first to be joined by these special dual fuel vessels.
The 3,000/3,500 m³ trailing suction hopper dredger (TSHD) ‘Minerva’ was launched at Royal IHC at the end of 2016, and is scheduled to enter the fleet in 2017. ‘Minerva’ is the first dredging vessel in the world to be equipped with dual fuel engines and capable of operating in full LNG mode.
Meanwhile, the 7,950/8,400 m³ TSHD ‘Scheldt River’, also built at Royal IHC, was launched in January 2017 and will be put into service during the summer. Additionally, these vessels pioneer the combination of two-speed propulsion boxes and combinator mode, which results in substantial fuel savings and emission avoidance, particularly when operating at low speeds and manoeuvring.
Thanks to the combination of unique characteristics such as a very long suction pipe, a large transport capacity with limited draught and an additional, heavy-duty trail pipe with rock draghead, this multidisciplinary vessel can be used effectively in shallow water and in hard soils.
‘Bonny River’ will be able to minimise the turbidity generated by process water and facilitates dredging in environmentally sensitive areas. Moreover, the hydrodynamic hull and the dual fuel engines (diesel and LNG) ensure further optimisation of the fuel consumption and a minimal carbon footprint.
The vessel features more than 3,000 m2 of unobstructed deck space. This is coupled with a substantial rock dumping ability of 12,000 tonnes. Built as a dual fuel vessel, ‘Living Stone’ also has a relatively limited draught.
DEME has unveiled the mighty ‘Spartacus’.With a total installed capacity of 44,180 kW, ‘Spartacus’ is simply the most powerful CSD that has ever been built. She will be 50% more powerful than DEME’s existing CSDs, which are already giants in their own right. Her sheer cutting power will enable her to cut harder soils at speeds that have not been possible before. This means that work can be taken on by the cutter dredger rather than relying on the use of dynamite and blasting.
‘Spartacus’ will be able to dredge in waters of up to 45 m, compared to the 35 m depth which is presently the upper limit in the market and she is capable of operating in very remote locations with limited infrastructure, given her fuel autonomy and accommodation capacity.
The newly planned vessel will offer much improved crew comfort levels as the deck house will be supported by air cushions, minimising any vibrations. There is also a large workshop aboard for repairing cutterheads.
DEME believes this exceptional vessel will create its own market, by achieving what has been impossible until now.
‘Spartacus’ was ordered at Royal IHC in February 2017 and will be delivered in the summer of 2019. ‘Spartacus’ is fully diesel electric and is equipped with dual fuel engines engines and an LNG tank. The CSD boasts a number of very innovative features.
Another giant DEME is investing in will largely serve the offshore wind market.
The 216.5 m long offshore construction vessel features a crane with unseen lifting capacity.
‘Orion’ has truly great transport capacity and can take multiple very large and heavy monopiles and transition pieces in a single shipment. With DP3 technology the offshore installation vessel can continue operations under the most challenging conditions. ‘Orion’ is very energy efficient and clean because it runs on LNG.
The state-of-the-art vessel will enter the DEME fleet in the fourth quarter of 2019.