• 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.




2020 September 25

16:19 OOCL's service update for Trans-Pacific trade
16:16 Representative office of Marinet opened in China
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14:59 RFC held the second stage of the ecological marathon
14:31 Bunker prices are flat in the Port of Saint-Petersburg, Russia (graph)
14:05 Zvezda shipyard to build 10 gas tankers for Arctic LNG 2
13:42 Wärtsilä solutions meet challenging needs of Canadian Coast Guard vessel
13:18 Nuclear-powered container carrier Sevmorput delivered Kamchatka fish to Saint-Petersburg
12:56 Competition for construction of two scientific research ships for Russian Federal Fisheries Agency to be announced in October
12:34 Royal Niestern Sander orders SCHOTTEL thrusters for world’s first shallow-draught ice-breaking W2W vessel
12:11 VEB.RF starts financing construction of ten gas tankers for Arctic LNG 2 project
11:29 LR awards Samsung Heavy Industries AiP for its ammonia-fuelled tanker
10:37 British Ports Association sets out spending review priorities
10:29 New state programme on Arctic development in 2021-2024 drafted by Russia’s ad hoc Ministry
09:53 Debt service guarantees on Yamal LNG removed from NOVATEK
09:30 Oil prices rise in hope of demand
09:12 Baltic Dry Index as of September 24
09:11 MABUX: Bunker market this morning, Sept 25

2020 September 24

18:37 Kongsberg Digital develops cloud-based simulators for maritime industry, with funds from Innovation Norway
18:07 Wärtsilä ranked first in UN challenge to fight climate change with big data
17:45 Alco Bio Fuel, Messer Benelux and IJsfabriek Strombeek once again invest in recycling CO2 in North Sea Port
17:20 World’s first subsea compression system passes five years in operation
17:12 Esben Poulsson reappointed as ICS Chairman for a new term
16:48 Okskaya Shipyard launches first multipurpose dry cargo carrier of Project RSD59 for Astrol
16:24 Severnaya Verf starts cutting steel for seventh trawler of Project 170701 for NOREBO Group
15:50 ASCO's vessel “Razul Rza” sent to outer waters after repairs
15:26 Russian Direct Investment Fund (RDIF) to invest in Sovcomflot, says RDIF CEO
15:02 Diana Shipping announces the sale of a Capesize Dry bulk vessel
14:39 Russian Railways launches regular multimodal service from China to Europe via the ports of Kaliningrad and Hamburg
14:17 MABUX releases its weekly review of bunker market
14:02 Fincantieri starts dry dock works for experimental vessel Zeus
13:40 Freeport of Riga Authority signs Declaration of Cooperation with Port of Shenzhen
13:21 IMO celebrates World Maritime Day 2020
13:08 Total and MOL officially name the world’s largest LNG bunker vessel
12:48 Bunker prices decrease in the Far East ports of Russia (graph)
12:25 ZIM launches new China-Australia Express Line
12:11 Inmarsat Fleet Lte service coverage extended to Gulf of Mexico following successful trials with V.Ships Offshore
11:32 Ships of RF Navy’s Black Sea Fleet take part in "Kavkaz-2020" maneuvers
11:14 Port of Trelleborg offers their shipping customers reliable and fast internet with Nowhere Networks
11:13 "Tatarstan" missile ship of RF Navy’s Caspian Flotilla involved in "Kavkaz-2020" maneuvers
10:09 CTI-Maritec receives DNV GL approval for ballast water testing
09:57 Muuga freight station of Rail Baltica is to be designed by SWECO Projekt AS
09:36 MPC Container Ships ASA announces appointment of new CFO
09:29 Oil prices decrease amid concern over demand/supply imbalance
09:11 Baltic Dry Index as of September 23
08:40 MABUX: Bunker market this morning, Sept 24

2020 September 23

18:15 HMM opens Fleet Control Centre
17:35 Stena develops a solution to use recycled batteries in charging stations at port
17:05 Philippine Ports Authority COVID-19 Molecular Testing Center for seafarers now operational
16:42 British Ports responds to reasonable worst-case scenario Brexit assumptions
16:17 Vestdavit wins contract to supply six Australian Navy patrol boats
16:03 ABB powers P&O super-ferries towards new sustainable transport era
15:43 Royal Niestern Sander orders SCHOTTEL thrusters for world’s first shallow-draught ice-breaking walk-to-work vessel
15:25 FESCO’s Board of Directors elected new Management Board
15:03 Kalmar’s fuel-efficient terminal tractor solutions selected by Yilport for fleet expansion at Puerto Bolívar and Gävle container terminals
14:47 RF Government to revise comprehensive plan for upgrading and expanding core infrastructure
14:30 U.S. Coast Guard awards four more fast response cutters to Bollinger Shipyards
14:01 ESPO expresses commitment of European ports to play their part in helping shipping sector decarbonise
13:28 Travelling by ferry between Finland and Sweden is now permitted without restrictions
13:19 Damen delivers ASD Tug 2810 to Thomas Service Maritimes