• 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 February 22

18:25 European Commission fines maritime car carriers, parts suppliers in three separate cartel settlements
18:11 Port of Gdansk expects multimilloin investments
17:51 Port of St. Petersburg bunker prices edge up (graph)
17:35 Russia’s antitrust regulator gives Transneft green light on Novorossiysk Commercial Sea Port deal
17:02 Maersk Line announces an increase in FAK rates from Far East to North Europe
16:02 The tall ship that harnesses the wind to recharge its batteries
15:29 Port of Tallinn opens passenger terminal A renovated arrivals hall
15:13 MABUX: Bunker market may continue moderate upward evolution next week
15:02 GoodBulk announces delivery of two Capesize vessels
14:40 New product tanker of RTS27M series Balt Flot 20 takes to the water at Krasnoye Sormovo Shipyard
14:02 European Commission issues decision concerning the Violation of European Antitrust Law
13:35 Vostochny Port JSC picks contractors for coal transfer stations Phase 3 project
13:32 HMM reaches over 10,000 TEU in terms of volume of its US Premium Service
13:02 Boskalis receives EUR 300 million Letter of Award for Singapore Finger Pier 3 development
12:24 Northwest Seaport Alliance container volumes decline in January
12:17 Bunker prices in Far East seaports close the week flat
12:12 Rolls-Royce to supply propellers and mission bay technology for UK Royal Navy’s Type 26 Global Combat Ship
10:41 Crude oil futures prices fell 0.81% to $64,89 in London, in New York – by 1.07% to $61,02
10:32 Waterborne freight in Ukraine rose in January by 71.7% to 300,000 tonnes
10:05 CMA CGM announces GRR from the U.A.E. to West Africa
09:18 Waterborne passenger traffic in Ukraine plummets 44.4% in January
09:13 Baltic Dry Index gains to 1146 points
09:05 Konecranes strengthens its bulk handling presence in Japan with a Model 4 mobile harbor crane
08:17 World port accelerator programme PortXL to be launched in Singapore

2018 February 21

19:06 Russia’s State Duma set to change tariff policy to lend a helping hand to inland water transport
18:07 ONE, OOCL and SACO Shipping use booking tool eBooking
17:43 Renovated Stena Line Terminal at Europoort starts operation
17:06 Project to map ocean floor by 2030 now operational
16:52 Rosterminalugol export coal terminal handles 3-millionth tonne YTD
16:22 Zelenodolsk Shipyard to host keel-laying of 11th Buyan-M class corvette, Feb. 23
15:03 Launching of RST27M Balt Flot 20 at Krasnoye Sormovo Shipyard slated for Feb. 22
14:14 NGO Shipbreaking Platform publishes list of ships dismantled worldwide in 2017
13:18 ATOMFLOT says Russia needs nine more icebreakers for the Northern Sea Route by 2025
13:01 Clarksons Platou collaborates with Maersk Line to provide shipping services in Egypt
12:43 Big Port of St. Petersburg imposes ice restrictions in the harbour effective as of March 7, 2018
12:31 Castellammare Di Stabia starts slipway works on the multipurpose amphibious unit
12:10 Rosterminalugol transferred over RUB 1.5bn of taxes to different budgets
12:01 Panama Canal hosts Cheniere Energy to discuss LNG’s Future at the waterway
11:25 MOL car carrier rescues castaways in the North Atlantic Ocean
10:53 Crude oil futures prices edge down 0.8% to $64,73 in London and 1% to $61,17 in New York
10:46 Sovcomflot and Shell ink time-charter agreements for Aframax LNG-powered duo
10:35 Vostochny Port obtains ISO 14001:2015 certificate
09:48 Port of St. Petersburg bunker prices move upward
09:26 Baltic Dry Index rises 2.76% to 1117 points

2018 February 20

18:37 Time is running out to register for the Dangerous Goods: New Requirements for Transportation Conference, March 1, 2018
18:31 Russian association of fishery businesses call to revise a 'fishing quotas per a keel' terms
18:06 AVANZA completes a successful trial with Daikin Reefer
17:38 The Maritime CIO Forume Cyprus 2018 to be held in Limassol, March 27
17:03 DNV GL issues over 50,000 electronic certificates
16:55 RIMS secured a further class approval from Korean Register of Shipping for the use of drones during surveys
16:39 Taganrog Commercial Sea Port spent $156 000 on environment protection in 2017
16:34 Wärtsilä and Maersk Drilling create a joint 25-year strategy for thruster services to increase uptime and reduce costs
16:04 Post-Brexit port health border disruption still a major concern for British ports
15:34 Goltens teams up with Yara Marine on SOx scrubbers
15:21 Taganrog Sea Commercial Port earmarked $74,4 to support social programmes in 2017
15:04 US Navy awards concept design contract to Fincantieri to evolve FREMM into FFG(X)
14:32 Port of Marseille Fos traffic up 8% in 2017
14:02 The largest vessel enters Busan Port since its opening
13:32 Carnival Fascination resumes year-round service from San Juan
13:20 Port of Kavkaz sees a 50% spike in freight volumes, to 1.98 million tonnes