• 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 July 21

11:37 MAIB reports on tug Dominigue capsize accident in Madagascar resulting in 2 fatalities
11:19 In HI’2017 TransContainer transported 869,000 TEUs, up 18.7% Y-o-Y
10:58 Academic Pashin tanker underwent inclining experiment at Nevsky Shipyard
10:23 First Damen dredger for Australia TSHD 650 en route to Gippsland Ports
10:16 JFSE launches patented revolutionary jetting technology for subsea excavation
09:59 Oil spill response workshop held in Senegal
09:34 Indicative bunker prices go up at the port of Saint-Petersburg, Russia (graph)
09:17 Baltic Dry Index up to 964 points

2017 July 20

18:35 Wärtsilä reports order intake and net sales growth in H1 2017
18:10 Workshop of International Dialogue on Migration held in Geneva
17:49 ClassNK Singapore marks 50 years with anniversary party
17:35 UK's MCA conducts exercise for response to spills from shipping and offshore installations
17:13 DNV GL releases its updated NOx TIER III compliance guide
17:01 Port of Rotterdam half-year cargo volumes rose 3,9%
16:54 RF Navy's large tonnage warships are training in Kronstadt before the Main Navy Parade
16:35 LUKOIL Board of Directors approves members of Company Management Committee
16:14 Van Oord wins contract for mega waterfront project in Dubai
16:03 No visible drivers on the bunker market so far, expert says
15:53 MacGregor to supply on-vessel equipment to Excelerate Energy
15:31 HHI offers smart ship ICT technology for better navigation and management of ships
15:12 Boskalis contracted to build Stockholm Norvik Port quay wall in Sweden
15:08 Long Beach City Council confirms Colonna, Lowenthal appointments to Board of Harbor Commissioners
14:51 Swedegas and Fluxys LNG start cooperation for LNG project in the port of Gothenburg
14:32 BV granted approval in principle for Wison’s 50MW floating LNG power supply barge
14:06 Cargo shipments by North-Western Shipping Company up 5% to 2.76 mln t in HI’2017
13:40 Marine Recruiting Agency in HI'17 increased the number of graduates by 58%
13:17 Austal continues industry engagement with Queensland businesses for OPV project
12:55 FESCO delivered outsized Power Machine’s equipment to Vietnamese Power Plant under construction
12:33 Port of Gdansk throughput up 3.6% to 18.57 mln t in Jan-June'17
12:11 OSU researchers work to improve AUVs’ energy efficiency
11:58 HII's NNS gets $148.7 million as CVN 80 contract modification
11:50 Frigate ‘Admiral Makarov’, corvette ‘Stoyky’ and major missile boat ‘Dimitrovgrad entered the Neva River
11:29 Bunker prices are slightly down at the Far East ports of Russia (graph)
11:12 Bureau Veritas and Ascenz join forces in ship performance agreement
10:36 USPA submits to Ukraine’s Ministry of Infrastructure a revised draft of the Port Dues Methodology
10:14 Kongsberg Maritime secures first order for autonomous surface vehicle control system K-MATE
09:52 Supervisory board of Tallink Grupp start exploratory process relating to potential strategic options
09:33 Port of Tallinn announces the winner of the design contest for the Old City Harbour bridge
09:17 Baltic Dry Index up to 948 points

2017 July 19

18:24 Tele-Fonika Kable to acquire JDR
18:11 Rolls-Royce signs new service agreement
18:00 Throughput of port Kaliningrad in Jan-June'17 grew by 8% to 6.60 mln t
17:44 Throughput of port Vyborg up 3% to 608,000 t in 6M’17
17:28 JDR awarded contract for the provision of termination and testing services for Beatrice offshore windfarm project
17:25 GE and Maersk Drilling accelerate their digital partnership to drive industry transformation
17:02 Throughput of port Vysotsk up 10% to 9.13 mln t in Jan-June'17
16:38 Port of Los Angeles to extend public comment, review period for draft SEIR on China Shipping Container Terminal project
16:20 Throughput of port Primorsk in 6M’17 down 4% Y-o-Y to 31.34 mln t
16:00 Throughput of Ukraine’s seaports in HI'17 climbed by 5% Y-o-Y to 66.3 mln t
15:37 The Port Authority Police Department files disciplinary charges against police supervisors
15:16 Throughput of port Ust-Luga up 14% to 50.94 mln t in HI’2017
15:13 Port of Antwerp half-year throughput rose 2.8% to more than 111 mln tonnes
14:53 Vladimir Putin signs amendments to the Federal Law on Seaports
14:31 Port of Los Angeles ends FY2017 with record volumes of 9.2 million TEUs
14:15 Krasnoye Sormovo shipyard to launch chemical carrier of Project RST27М built for BF Tanker on July 21 (photo)
13:40 Passenger Port of St. Petersburg welcomes legendary four-masted barque "Sedov"
13:11 Port of Long Beach Q2 container traffic rises 8.3% to nearly 1.9 million TEUs
12:56 Throughput of Big Port St. Petersburg up 7% to 26.02 mln t in 6M’17
12:27 Peel Ports begins second phase of Liverpool2 expansion
12:08 Barrow’s 150th anniversary parade marks milestone in history of port and town