• 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 June 19

15:02 CMA CGM announces GRR from East Coast South America to Africa, Gulf and West Coast North of India
14:32 Port of Oakland import volume flat in May 2018
14:25 Europort Romania maintains its position as the premier Black Sea martime event
14:02 British Ports Association comments on new report on Northern ‘Free Ports’ strategy proposal
13:32 Port seeks to double rail volume with Railport Antwerpen
13:02 Rijkswaterstaat awarded Van Oord the contract to dredge Marker Wadden channel
12:32 MOL to make full-scale move into subsea support vessel business by acquiring stake in AKOFS of Norway
12:28 HELCOM Heads of Delegation approve Baltic Sea Action Plan update process and welcome new HELCOM Chair
12:02 Bunker prices continue growing at the Far East ports of Russia (graph)
11:37 Damen and Saab announce partnership to participate on the tender for the Tamandaré Class Corvette
11:34 Saturnus, first vessel in the Evolution series, launched at AVIC
11:09 Marine Technics and Alexeev’s Hydrofoil Design Bureau extend joint projects
10:45 Arctia appoints Senior Vice President for Offshore and Marine Services
10:23 Brent Crude futures price down 0.64% to $74.86, Light Sweet Crude – down 0.62% to $65.28
10:01 Small missile ships of RF Navy’s Caspian Flotilla sail from Sevastopol to Mediterranean Sea
09:40 Rescuers of RF Navy’s Northern Fleet train in rendering assistance to submarine in Kola Bay
09:16 Baltic Dry Index up to 1,442 points

2018 June 18

18:12 Azerbaijan Caspian Shipping Company takes part in TransCaspian/Translogistica 2018
17:57 Legislative amendment promotes automatisation tests in maritime transport with regard to manning and watchkeeping
17:35 First major forum on the new Silk Road organised by the Port of Marseille Fos
17:05 Aker Solutions teams up with SAP for next steps in digitalizing its business
16:45 HMM signs Letter of Intent for its mega containership orders
16:24 Victor Olersky handed in his resignation notice
16:18 European Council extends sanctions on Crimea and Sevastopol for another year
16:05 DryShips announces agreements to sell two older Panamaxes
15:40 Tuapse Commercial Seaport elected seven BoD members
15:33 Poland holds World Maritime Day Parallel Event
15:13 IMO member states must progress on key sulphur cap issues at critical meeting in July
14:59 Average wholesale prices for М-100 HFO down to RUB 17,923 in RF spot market
14:13 Navios Maritime Containers announces acquisition of five containerships and options to acquire four additional containerships
13:35 Maersk launches a new line to the Middle East from Fos
13:00 Aker Arctic demonstrates autonomous vessel in model tests
12:36 ABB to improve Edda Fides floating hotel safety with leading digital technology
11:47 Freeport of Riga Authority and Port of Rotterdam Authority sign cooperation agreement
11:24 Port of Tallinn signs MoU with the City of Tallinn for development of the Old City Harbour area
11:01 Dorian LPG Board declines BW LPG'S unsolicited proposal
10:25 Brent Crude futures price down 0.76% to $72.88, Light Sweet Crude – down 1.73% to $63.73
10:12 Capital Product Partners L.P. announces new period charters for four of its product tankers
10:03 Port of Silloth invests £250,000 in new solar farm on Marshall Dock
09:41 Fishers fatalities give impetus to fishing vessel safety work
09:18 Baltic Dry Index up to 1,445 points

2018 June 17

18:40 Port of Oakland's largest terminal operator OK new lease to 2027
18:38 GoodBulk Ltd. announces delivery of Capesize vessel
18:32 Navios Maritime Partners announces sale of containership and options to sell four additional containerships

2018 June 15

18:35 Hapag-Lloyd implements Peak Season Surcharge from Mediterranean to USA
18:05 Wallenius Wilhelmsen Ocean adds Adelaide on the Australia service
17:54 Throughput of port Kaliningrad in 5M’18 up 12% Y-o-Y to 6.05 million tonnes
17:35 GTT conducts two FEED studies on two types of Gravity Based System
17:20 Throughput of port Vyborg in 5M’18 up 22% Y-o-Y to 610,900 tonnes
17:05 Port of Koper officially part of the New Silk Road
16:40 Yantar Shipyard launches yet another trawler of Project SK-3101R
16:35 Port of Long Beach volume up to 687,427 TEU in May 2018
16:05 Royal IHC joins PortXL
15:45 Throughput of port Vysotsk in 5M’18 declined by 3% Y-o-Y to 7.49 million tonnes
15:22 Main phase of Nizhegorodsky hydrosystem project obtains state expert approval
15:21 VTG FastTrack makes ad hoc transportation from the Port of Hamburg possible
15:00 Vopak opens new rail infrastructure in the port of Antwerp
14:21 Royal IHC and IHC IQIP sign memorandum of agreement with SOIC
14:09 DNV GL issues first type approval for aluminium cables onboard ships
13:16 Throughput of port Primorsk in 5M’18 down 18% Y-o-Y to 22.63 million tonnes