• 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 November 25

06:59 Inchcape Shipping Services appointed agents for COSCO SHIPPING Lines in Papua New Guinea

2017 November 24

20:49 Pella Shipyard launches Karakurt-class first serial corvette (Project 2280) ‘Typhoon’
18:06 Sanmar delivers two ASD tugs
18:06 RN Bunker supplies fuel to Rosmorport's STS Mir
17:36 DHT Holdings announces sale of its three oldest VLCCs
17:15 IMO holds training for port security staff in Guinea
16:47 Wärtsilä introduces its Smart Marine Ecosystem vision
16:46 Cargo traffic in Kama Basin of Russia’s IWW grew by 22.4% to 13.40 mln t (photo)
16:27 IMO addresses invasive aquatic species carried in ballast water through BWM Convention
15:59 State Duma approves prolongation of RF Government Decree No 383 through 2019
15:28 Bolwerk LLC selected as general contractor to build an international marine terminal in Pionersky, Kaliningrad Region
15:03 PSA Singapore and NUS sign MOU to develop Human Capital to support the growth of the port industry
14:31 Design works under MTH project to be completed in 2018
14:03 APM Terminals Inland Services expands to serve the industrial belt around Pune, India
13:40 Euronav sells VLCC Artois
13:29 Navigation season is over in White Sea – Onega Lake Basin of Russia’s IWW (photo)
13:02 The Port of Montreal invests in greening
12:30 ZIM posts Q3 2017 results
12:12 Lead buoy tender of Project BLV04 build for FSUE Rosmorport is put into operation (photo)
12:00 Public Transport Authority raises Saudi flag on Bahri’s fifth VLCC received in 2017
11:30 GVT to increase the frequency of its rail shuttle service between Rotterdam and Chengdu in China
11:14 Europort confirms role as international maritime business hub
11:01 British ports welcome Budget announcements on Brexit scenario funding and freight review
10:45 Financial support for the Polar Code and the Sustainable Development Goals
10:31 European ports welcome the EP Transport Committee vote for a stronger CEF budget
10:11 Finnlines finishes the first lengthening project of ro-ro vessel
10:01 Brent Crude futures price down 0.27% to $63.38, Light Sweet Crude – up 0.76% to $58.46
09:37 Bunker prices are flat at the Port of Saint-Petersburg, Russia (graph)
09:20 Baltic Dry Index up to 1,445 points
07:48 Palau International Ship Registry is the fastest growing flag

2017 November 23

18:05 CMA CGM announces FAK rates from Asia to Mediterranean
17:54 Mercury-1 ferry of Azerbaijan Caspian Shipping Company successfully passed sea test after major repairs
17:35 Ophir issues update on the status of the Fortuna FLNG project
17:20 Opatija, Croatia hosts three-day conference “The Port of Rijeka, Gateway of the Baltic-Adriatic Core Network Corridor”
17:05 Navantia and Bath Iron Works team for the US Navy Future Guided Missile Frigates
16:50 Throughput of Chinese ports up 7.2% to 7.23 bln t in 10M’17
16:35 COSCO (Guangdong) Shipyard delivers research/survey vessel to Guangzhou Marine Geological Survey
16:05 CMA CGM announces GRI from Asia to ECSA
16:03 Bunker prices may turn into irregular phase in the lead-up to OPEC’s meeting
15:44 Okskaya shipyard lays down the first non-self-propelled oil barge in a series of ten vessels ordered by STLC
15:33 European Sea Ports Organisation welcomes a deadline for global solution on CO2 from shipping
15:00 Ports of Ayr and Troon celebrate delivery of new Scottish-built pilot vessel
14:19 Corvette Soobrazitelny, Baltic Fleet, performed some training missions in piracy affected areas in Gulf of Aden
14:02 Wärtsilä engines and exhaust gas cleaning chosen for new cruise ship
13:23 Navigation 2017 to close in Azov-Don Basin of Russia’s IWW on 1 December 2017
13:02 Oldendorff Carriers receives IBJ Bulk Ship Operator of the Year award
12:36 Russia’s General Board of State Expert Review approves Phase I of Bagayevsky Hydrosystem project
12:10 Ports of Ayr and Troon celebrate delivery of new Scottish-built pilot vessel
11:52 Marine Recruiting Agency goes on with the program of RTG operators training
11:29 Coal exports via Rosterminalugol terminal hit 22 mln t milestone this year (photo)
11:04 MGO prices are still high at the Far East ports of Russia (graph)
10:41 Throughput of port Kaliningrad in Jan-Oct'17 grew by 16% to 11.28 mln t
10:18 Brent Crude futures price down 0.25% to $63.16, Light Sweet Crude – down 0.21% to $57.90
09:53 Ukraine’s water transport carried 0.5 mln passengers in Jan-Oct'17, up 30.2%, Y-o-Y
09:35 Port of Singapore throughput up 5.9% to 519.68 mln t in 10M’17
09:17 Baltic Dry Index up to 1,413 points

2017 November 22

18:02 Throughput of port Vyborg up 13% to 1.24 mln t in 10M’17
17:46 New research reveals ‘golden period’ ahead for the Port of Barrow
17:24 Iceland accedes to air pollution treaty
17:03 MSC receives the ‘Container Line of the Year’ award