• 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.




2018 April 24

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12:56 Bunker prices are going down at the Far East ports of Russia (graph)
12:33 Aleksey Kadilov elected as Director General of Baltiysky Zavod (photo)
12:09 US Federal Maritime Commission to examine trucking & delivery arrangements
11:45 Russia’s General Board of State Expert Review approves yet another phase of project on construction of Zvezda shipyard (photo)
11:09 CMA CGM announces GRR from Asia to East Africa
10:45 Foreship takes world’s leading CFD simulation software, StarCCM+ into use
10:30 ABP shortlisted for two Humber Renewables Awards
10:22 Brent Crude futures price down 0.04% to $74.03, Light Sweet Crude – down 0.13% to $68.31
10:08 Nakilat is the first company in Qatar certified for ISO45001
09:39 Freeport of Riga Authority along with several port companies visited TransRussia 2018
09:17 Baltic Dry Index up to 1,306 points
09:08 Compensation regime for Hazardous and Noxious Cargoes a step closer - IMO
08:48 City of Antwerp and Antwerp Port Authority start urban mission to Moscow and St. Petersburg

2018 April 23

18:06 World’s largest short sea Ro-Ro vessel MV Celine christened at Dublin Port
17:52 Digital Ship’s Maritime Big Data Forum will be held on 29 May 2018 in Oslo
17:36 Ocean Rig announces agreement to postpone delivery of newbuilding drillship Ocean Rig Santorini
17:20 Construction of Bagayevsky hydrosystem begins in Rostov Region (photo)
17:05 ITF urges Hutchison Ports to improve global health and safety operations
16:35 Polskie LNG conduct a technical dialogue on extension of LNG Terminal in Świnoujście
16:29 Rosmorport’s icebreakers assisted over 5,700 vessels in freezing seaports of Russia this winter navigation season
16:05 Hapag-Lloyd plans 20 percent reduction in CO2 emissions by 2020
15:55 Azerbaijan Caspian Shipping Company to provide additional scholarships for students
15:33 TransContainer’s net profit in QI’2018 increased by 19.5% Y-o-Y to RUB 1.479 million
15:04 M.v. Tucana delivers fibre optic cable baskets from Drammen (Norway)
14:47 Port of Gdansk (Poland) throughput up 44% to 12.7 million tonnes in January-March 2018
14:31 Average wholesale prices for М-100 HFO in RF spot market up to RUB 13,542 per tonne
14:10 ICTSI PNG units ink union agreements
13:59 MOL сrude oil tanker rescues a castaway in the South China Sea
13:39 Container barge transport to become more efficient in the port of Antwerp
12:48 Cargo transportation by Ukraine’s water transport fell by 7.3% to 0.7 million tonnes in 3M’18
11:46 Vistula Maersk makes a maiden call to St. Petersburg, as first in series of new ice-class vessels
11:13 2 icebreaker escort operations performed in eastern part of Gulf of Finland during 24 hours on April 22-23
10:51 Training ship Perekop completes unofficial visit to Republic of Sri Lanka
10:25 Brent Crude futures price down 0.04% to $74.03, Light Sweet Crude – down 0.13% to $68.31
10:04 Workshop on IMO's ISPS Code held in Mexico
09:40 Training on ship air pollution and low carbon measures held in Tehran
09:17 Baltic Dry Index up to 1,281 points

2018 April 22

15:33 Port of Rotterdam Authority to realise tide pools along Calandkanaal
15:32 British Ports Association raise border facilities' concerns with PM
15:31 Hapag-Lloyd to revise the Fuel Surcharge for Inland Haulage under Carrier arrangement from Germany to Belgium and Netherlands
15:30 JAXPORT names Interim Chief Financial Officer
15:28 Seaspan announces senior management change

2018 April 21

15:06 MV Thuringia makes maiden CI3 service call at Chennai International Terminals
15:04 Diana Shipping announces time charter contract for m/v Arethusa with Glencore
15:00 Gothenburg Port Authority publishes Sustainability Report for 2017
14:47 Wärtsilä welcomes global shipping’s agreement to cut greenhouse gas emissions
14:45 Vopak to invest in new storage capacity at its Rotterdam terminal

2018 April 20

18:15 Yaroslavsky Shipyard launches yet another boom-laying boat (photo)
18:03 CMA CGM announces FAK rates from Asia to Middle East Gulf
17:47 President of Cyprus visits IMO
17:29 NOVATEK’s AGM approves 2017 dividends
17:03 SEA\LNG reiterates LNG’s central role in meeting IMO’s decarbonisation goals
16:40 SCF Group’s financing deal with VTB Bank recognized by Marine Money as a Deal of The Year
16:03 CMA CGM announces an agreement to acquire a stake in CEVA
15:36 Nuclear-powered submarine Severodvinsk passed control check for winter training period
15:03 MEPC 72: Proposal to mandate ISO sulphur test methods to be discussed further
14:40 Krasnoye Sormovo shipyard launches Russia’s first dry cargo carrier of Project RSD59 (photo)
14:24 HELCOM group meets in Berlin to focus on reducing land-based pollution affecting the Baltic Sea
13:38 WMU supports IMO climate change strategy for shipping