• 2018 July 17 14:23

    Jan De Nul launches ultra-low emission vessel Diogo Cão in China

    The 3,500 m³ Trailing Suction Hopper Dredger Diogo Cão was launched last Saturday at the Keppel Nantong shipyard in China, a subsidiary of Keppel Offshore & Marine, the Group said in a press release. This green vessel is the second of three 3,500 m³ hoppers to be launched, equipped with an exhaust gas treatment system filtering out and virtually eliminating many pollutants from the exhaust gases. In total, Jan De Nul Group ordered six such ultra-low emission Trailing Suction Hopper Dredgers, called Ultra-Low Emission Vessels, five of which are being built at Keppel: three small 3,500 m³, two medium-sized 6,000 m³ and a larger vessel at 18,000 m³.

    All six vessels are diesel-electrical powered, with engines allowing optimal use of generated power but with low fuel consumption and emissions. In addition, the vessels are equipped with a two stage highly efficient exhaust gas filter system, resulting in emissions complying with the European Stage V regulations for inland waterway vessels.

    “We are delighted to be leading the way in compliance with the most stringent global emission limits with the world’s first EU Stage V dredgers, which will be highly fuel-efficient, reliable, versatile and productive,” says Robby De Backer, New Building Director at Jan De Nul Group. “Their use will enable dredging projects to be completed with the lowest levels of emissions to date.”

    “As the new dredgers will frequently operate in estuaries, rivers and coastal areas near urban areas, we decided to limit the NOx emissions to a level 30% below the actual IMO Tier III requirements, and to reduce other potentially harmful contaminants that are currently not regulated by IMO,” says De Backer.

    The singularity of not choosing clean burning fuels
    In a world of climate change and overall environmental consciousness, Jan De Nul Group has chosen to design and build its latest generation of dredging vessels, running on diesel and equipped with exhaust gas after treatment system. Ambient air in urban environments often contains all kinds of particles and other toxic substances. Jan De Nul aims at minimising its contribution to manmade dangerous pollution sources in those urban areas.

    Burning cleaner fuels helps to reduce some individual pollutant levels, whereas Jan De Nul has taken the initiative to actually remove or eliminate active pollutants from exhaust gases.

    By doing this, Jan De Nul takes a different approach than others who have chosen clean burning fuel vessels. “Our main target from the start was: how can we lower the air pollution caused by dredging vessels?” says Michel Deruyck, Fuel Coordinator at Jan De Nul Group. “We focus on the impact that maritime transport and port development has on public health and ambient air quality. During the new dredger design phase, we looked at different options and technologies, with the goal of maximising pollution reduction or elimination, and preparing for the stricter European land and inland waterways emission regulations Stage V, due for implementation in 2020.”

    Stage V regulation and catalytic filtering technique
    The maritime transport regulator International Maritime Organisation (IMO), states that clean burning fuel vessels have to comply with the IMO Tier III regulation. The European regulations on land, Stage V, are far stricter. Mainly because for the first time, particles emitted down to 23 nanometres are taken into account.

    The new vessels will operate with normally available ultra-low sulphur gasoil, with the exhaust gas treated in two stages by means of a Selective Catalytic Reduction (SCR) system, and a Diesel Particulate Filter (DPF). The SCR system lowers NOx to achieve EU Stage V levels for inland waterways. The second stage DPF removes particulates from the exhaust, also down to the future EU Stage V levels. Eliminating black carbon emission with the DPF significantly reduces the climate impact of these vessels.

    Jan De Nul Group chose technology based on the Swiss example of filtering exhaust gases in the tunnelling industry.  “Since the 1990s, the tunnelling industry has used exhaust gas filtration on vehicle and heavy duty machinery emissions to provide clean, breathable air for workers tunnelling under the Alps,” adds Michel Deruyck. “Today we are applying the same filtering techniques on our new vessels, and by accounting for particle numbers we obtain a 99% filtration efficiency and detoxification by catalysis.”

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

    The Diogo Cão is 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. Asymmetric load sharing results in optimal load distribution over the diesel generator sets. All these measures result in a low fuel oil consumption, which is the best in its class.

    Hopper capacity: 3,500 m³
    Deadweight: 5,500 t
    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): 3,000 kW
    Propulsion power: 2 x 1,100 kW
    Total installed diesel power: 5,510 kW
    Accommodation: 16 persons
    Keel laying of the first 6,000 m³ Trailing Suction Hopper Dredger
    Now the Diogo Cão is launched, the keel laying of the first 6,000 m³ vessel is planned to take place on 19 July at the Keppel Singmarine in Singapore.

    Jan De Nul Group recently decided to name both 6,000 m³ Trailing Suction Hopper Dredgers after two decommissioned vessels of the Groups fleet: Sanderus and Ortelius.

    Luxembourg, Belgium headquartered Jan De Nul Group is a family-owned company specializing in dredging and land reclamation, rock placing, trenching, rock dumping for oil and gas related offshore pipeline projects, quay walls, marine related projects, civil engineering and large-scale environmental remediation projects. Dredging accounts for 85% of the Group's turnover. With a yearly turnover of EUR 1.9 billion, the company ranks among the international top of dredging contactors and the top of marine engineering contractors.




2019 March 26

15:04 European Parliament adopts final agreement on the Connection Europe Facility for 2021-2027
14:51 LNG Terminal in Świnoujście accepts fourth LNG spot cargo delivery this year
14:39 NORDEN sells 4 dry cargo vessels
14:27 LOTOS and PGNiG: first commercial bunkerings of ships with LNG in Polish seaports
13:54 Orekhovo-Zuyevo, missile ship of RF Navy’s Black Sea Fleet, headed for Mediterranean under combat training plan
13:29 Phase 2 of Krievu Island project receives GRAND PRIX at Latvian Builders Association’s 2018 Annual Awards
13:02 Van Oord posts results for 2018
12:46 Sergey Karataev appointed General Director of Freight One JSC
12:20 Damen Verolme Rotterdam completes refit of drilling rig Stena Don
11:35 Rosmorport to hold an auction to sell its МСП-90 boom-laying boat
11:11 16 vessels escorted by icebreakers in eastern part of Gulf of Finland during 24 hours on March 25-26
10:49 Rosmorport to hold an auction to sell its Leader pilot boat
10:13 Brent Crude futures price is up 0.13% to $66.9, Light Sweet Crude – up 0.65% to $59.20
09:44 MABUX: Bunker Market this morning, March 26
09:22 Baltic Dry Index is down to 689 points
09:07 TenneT awarded a framework agreement to Jan De Nul Group for repairs of TenneT’s offshore high-voltage cables
08:07 Berths for inland shipping now operational in Afrikahaven at the port of Amsterdam
07:41 GTT grants certification to SVEZA Group for production of plywood for Mark III containment system

2019 March 25

18:00 Navis N4 TOS selected to enhance terminal operations at North Carolina Ports
17:50 Increased safety for pilots boarding in Solent with new weather station
17:45 EMAR Offshore Services welcomes Damen ASD Tug 2811
17:25 Three basins of Russia’s IWW prepared for navigation season of 2019
16:48 Krasnoye Sormovo shipyard signs contract on construction of 11 dry cargo carriers for STLC
15:52 Kenia host 6th Annual East Africa Transport and Infrastructure conference on 13-14 May 2019
15:26 UK Hydrographic Office works with Seychelles government to help tackle piracy in the Indian Ocean
15:04 Yang Ming reports financial results for 2018
14:03 Closing of MacGregor's TTS acquisition postponed to Q2 2019
13:10 ArcelorMittal and Dow start trials for a new CO2 project in North Sea Port
12:39 Average wholesale prices for М-100 HFO up to RUB 19,562 in RF spot market
12:05 Port of Antwerp updates figures for 2018
11:47 The Maritime Standard swings into 2019
11:30 Damen Shipyards Den Helder signs order with Netherlands’ Defense Material Organization for Expeditionary Survey Boat
11:21 Working group on construction of Nizhegorodsky hydrosystem established under auspices of RF Transport Ministry
11:12 MABUX: Bunker Market this morning, March 25
11:04 IMO-executed GloFouling project kicks off to protect marine biodiversity
10:36 Windpark Fryslân awards contract to Van Oord and Siemens Gamesa to build wind farm
10:30 Polarcus announces redelivery of Vyacheslav Tikhonov
10:00 Keppel finalizes the rig construction contract with Awilco Drilling for the construction of semisubmersible drilling rig
09:56 Throughput of Chinese sea and river ports grew by 3.2% to 2.03 billion tonnes in 2M’2019
09:34 Brent Crude futures price is down 0.64% to $66.32, Light Sweet Crude – down 0.76% to $58.59
09:15 Baltic Dry Index is down to 690 points

2019 March 24

16:29 VARO and GoodFuels extend partnership to scale Bio Fuel Oil availability to deep sea segment in ARA Region
15:13 New Kongsberg Maritime application enables Bureau Veritas to successfully complete the first ‘DP Digital Survey’
14:27 ESVAGT increases presence in dynamic offshore wind market
13:03 Semco secures EPCI contract with Total as part of the Tyra Redevelopment Project
12:01 Safe Scandinavia option restructure and extension

2019 March 23

16:03 NCL announces plans for new staff training facility
15:54 ABP Humber provides land to support KIA expansion
14:22 SeaPlanner to support marine coordination for Taiwan's Formosa I offshore wind farm
13:31 Høglund awarded fuel-gas supply systems contract for six Hurtigruten passenger ships retrofits
12:25 McDermott secures substantial offshore EPCI contract in the Middle East
11:21 MacArtney provide Active Heave Compensated MERMAC winch solution to Alcatel Submarine Networks for planned subsea offshore operations

2019 March 22

18:06 GE and Nedstack enter into a partnership to develop hydrogen fuel cell power systems for cruise vessels
17:57 Fitch affirms Deloports rating at 'BB-' with stable outlook
17:36 Samsung Heavy Industries receives a LNGC order
17:05 Maritime Union of Australia issues notice of legal rolling industrial actions at DP WORLD terminals in Australia
16:44 Maersk partners with global companies to trial biofuel
16:44 NATO allied nations from last year’s NATO Summit to attend Unmanned Maritime Systems Technology 2019
16:22 15th edition of Expomaritt Exposhipping Istanbul to be held 2-5 April 2019
16:05 Dutch Sustainable Growth Coalition partners with Maersk in world's largest maritime biofuel pilot