• 2017 March 17 17:57

    Jan De Nul Group orders new vessels with exhaust gas treatment systems


    Jan De Nul Group ordered three 3,500 m3 Trailing Suction Hopper Dredgers to be built at Keppel Nantong.

    The design of these vessels is based on the 3,400 m3 TSHD Alvar Nuñez Cabeça de Vaca and Sebastiano Caboto, built in 2011, and successfully operating since. The vessels combine a shallow draught with high manoeuvrability, making them very suitable for working in confined areas.

    The vessels are in diesel-electric execution: all major drives (thrusters, dredge pump, jet pumps...) are electrically driven, and controlled by means of frequency converters. In this way each system can operate at its optimal speed and power. Power is generated by means of three diesel generator sets; a control system automatically starts and stops the sets depending on the power requirement, and by means of asymmetric load sharing we ensure that the load is optimally distributed over the diesel generator sets. All these measures result in a low fuel oil consumption, which is the best in its class.

    Thanks to the low fuel oil consumption emissions are lowered, but in addition the vessels are equipped with exhaust gas treatment systems in order to further reduce harmful emissions.

    New vessels need to comply with IMO regulations for NOx emissions. As the new dredgers will frequently operate in estuaries and on rivers, or near the coast, and therefore near residential areas, Jan De Nul Group decided to limit the NOx emissions to a level far below the actual requirements, and to reduce other contaminants that are currently not regulated by IMO.

    The new vessels will operate with normally available fuel oil, and the exhaust gases are cleaned by means of a Selective Catalytic Reduction (SCR) system, and a Diesel Particulate Filter (DPF). The SCR system lowers the amount of NOx in the exhaust to a level corresponding with the future European (EU Stage V) requirements for inland waterway vessels; this standard is much more stringent than the applicable IMO Tier II and Tier III requirement.

    The DPF removes particulate matter from the exhaust, down to a level in accordance with the future EU Stage V requirement for inland waterway vessels.

    Combined with the use of readily available low sulphur fuels, the emissions (NOx, SOx, Particulate Matter, CO and Hydrocarbons) will comply with EU Stage V, and be better than any other vessel or dredger. They will be equivalent or better than these of a dredger using LNG as fuel. But, by using normally available fuels, compared to the limited availability of LNG, these lower emissions are achieved worldwide, and all of the time.

    LNG (Liquified Natural Gas, consisting mostly of methane) is being promoted as an environmental-friendly fuel. It has a number of advantages: for the same power less greenhouse gas CO2 is emitted, and emissions of some contaminants such as NOx, SOx, Particulate Matter are lower compared to a diesel engine on fuel oil, without exhaust gas treatment system. However, the same or even better results are achieved by using exhaust gas treatment, and the important environmental and operational downsides of LNG are avoided:

    Methane leakages (during production, transport, bunkering, …) and methane slip in the dual fuel engines (gas that is not burned and directly released in the atmosphere) are significant. Methane is a very potent greenhouse gas: over a 100 year period, the effect of methane on global warming is 34 times higher than the same amount of CO2. As a result, most studies conclude that with current technology, LNG as a fuel is not better, and in most cases worse than fuel oil with respect to global warming.

    The availability of LNG is poor. In addition, due to space and cost restrictions, LNG dredgers have very limited capacity for LNG, and therefore an autonomy of only about 1 week. In practice, a LNG dredger is only occasionally, and/or in a limited geographical area, capable of operating with LNG. Normal fuel oil will have be used for most of the time or in most of the world, and therefore without any improvement with respect to emissions.

    Technical specifications:

    Hopper capacity

    3,500 m³

    Deadweight

    5,500 tonnes

    Length o.a.

    89.3 m

    Breadth

    22.0 m

    Max. dredging depth

    27.6 m

    Suction pipe diameter

    800 mm

    Speed

    11.3 kn

    Pump power (trailing)

    1,250 kW

    Pump power (discharging)

    3000 kW

    Propulsion power

    2x1100 kW

    Total installed diesel power

    5,510 kW

    Accommodation

    16 persons

    Innovation, expertise and sustainability. These are the corner stones of Jan De Nul Group’s success. Thanks to its skilled employees and the world’s most modern fleet, Jan De Nul Group is a leading expert in dredging and marine construction activities, as well as in specialized services for the offshore industry of oil, gas and renewable energy. These core marine activities are further enhanced by Jan De Nul Group’s in-house civil and environmental capabilities offering clients a complete package solution.




2017 September 19

18:06 Samskip expands shortsea services in Scotland
17:48 Arctic Economic Council welcomes three new members
17:25 IMO is attending 34th session of ASEAN to update the Maritime Transport Working Group on its latest activities
17:06 Turkish shipyard Cemre Marin Endüstri A.S orders 4 x MAN 8L21/31 variable speed GenSets
16:39 Marine Engineering Bureau: half of Russia’s towing fleet is renovated, bunkering fleet situation is worse
16:14 MSC announces a new service between South America’s east coast and the Mediterranean
16:04 Port of Southampton completes construction of sixth multi-story car park
15:52 Turkish landing ship Bayraktar arrived in Novorosiysk
15:27 USPA announces tender for procurement of dredging vessel
15:04 GY Marinas and P&O Marinas launch superyacht complex in Sète, France
14:39 Commissioning works commenced at KN‘s LNG reloading station
14:14 Port of Gdansk, Port of Gdynia and Baltic Gateway attended Seatrade Europe in Hamburg
14:03 Wärtsilä Nacos Platinum bridge systems selected for two new mega yachts
13:50 IMO issues Guidelines on maritime cyber risk management
13:28 IMO says search and rescue is an international responsibility
13:01 Ningbo Zhoushan Port volumes up 72% to 254,000 TEUs
12:43 NEVA 2017, 14th International Maritime Exhibition and Conference of Russia, opens in Saint-Petersburg (photo)
12:22 Fuel oil prices are still high at the Far East ports of Russia (graph)
12:04 Jan De Nul wins IADC Safety Award 2017
11:40 Secretary-General of IMO believes in a great future of Vostochny Port (photo)
11:04 CMA CGM signs strategic partnership with Infosys to accelerate the transformation of its Information System
10:45 Central Design Bureau Iceberg developed basic design of new 40-MW icebreaker
10:37 GTT receives an order from Hyundai Heavy Industries to design the LNG tanks of a new FSRU
10:23 Maritime Salvage & Casualty Response conference held in London on 13-14 September
10:01 IMarEST workshop on practical biofouling management strategies held in Melbourne, Australia
09:42 Brent Crude futures price up 0.03% to $55.52, Light Sweet Crude – up 0.12% to $50.41
09:19 Baltic Dry Index up to 1,385 points

2017 September 18

18:37 Konecranes launches Crane Advisor customer support tool globally
18:07 Diana Shipping announces time charter contract for m/v Maera
18:06 Rosmorport is looking into construction of LNG bunkering tanker of 3,000 to 5,000 cbm in capacity
17:50 Rosmorport is going to build ships running alternative fuels
17:45 Italian terminal operator Spinelli purchases another Konecranes Gottwald Mobile Harbor Crane
17:33 DP World to acquire Dubai Maritime City and Drydocks World
17:25 IMO Secretary-General Kitack Lim visited sailings ship Nadezhda in Vladivostok (photo)
17:04 Chinese warships arrived at Vladivostok
16:47 Rosmorport to start construction of shallow-draft icebreaker before the year end
16:16 Vladimir Putin endorsed a list of instructions following the meeting on development of transport infrastructure in Northwest Russia
15:20 The Azerbaijan Government announces extension of ACG PSA to 2049 with co-venturers
15:06 Craneship launches icebreaking tugboat of Project Т40105, Yuribey, built for Atomflot (photo)
14:49 Wärtsilä launches new eco-friendly tug designs
14:23 ZIM marks the 3 millionth container at DaChan Bay Terminals
14:23 Average wholesale prices for М-100 HFO up to RUB 12,481 in RF spot market
13:55 Kitack Lim says Port State Control in the Asia-Pacific region is a deliberate focus of the Tokyo MoU
12:42 Sovcomflot awarded by Russian Ministry of Energy for achievements in R&D and innovations
12:20 6 races held as part of Russian Yachting Championship for SB20 class (photo)
12:01 EU countries authorized their vessels to fish unlawfully in African waters - Oceana
11:39 SCF supports development of professional maritime education in Russia’s Far East
11:17 Russia seeks closer cooperation with IMO, Vitaly Klyuyev says
11:00 Hapag-Lloyd orders 7,700 new reefer containers
10:40 Brent Crude futures price up 0.14% to $55.70, Light Sweet Crude – up 0.10% to $50.49
10:21 IMO Secretary-General Kitack Lim is on a formal visit in Russia
10:09 South Korean terminal operator PDCT puts Konecranes Gottwald Model 4 Mobile Harbor Crane into operation
09:31 DP World not to renew operating contract in Indonesia
09:18 Baltic Dry Index up to 1,385 points

2017 September 17

17:25 India signs $76mln loan deal with Japan International Cooperation Limited to upgrade Alang-Sosiya shipyards
17:23 CMA CGM outperforms the market with very strong operating and financial results in Q2 2017
17:21 IMO issues new warning on hazards of carrying bauxite by ship
17:19 DFDS increases its volumes on the North Sea freight routes to and from the UK
17:16 General Dynamics NASSCO named ‘Greenest Shipyard of the Year’

2017 September 15

18:06 Kiel Port Prize goes to Jörn Grage of SCA Logistics