After Treatment: Taking Emissions Down Another Notch

Monday, March 01, 2010
Photo courtesy of Cummins Holland

Engine manufacturers and their engineer teams have put a great deal of thought and money into reducing emissions in recent years. As limitations, particularly in the U.S. and Europe became more stringent, the engineers tuned the engine design with everything from electronic injectors to redesigned combustion chambers.
 
Further mandated reductions in emissions are anticipated. Some operators are not waiting for the regulations but are going to the next level with the aid of independent suppliers. The diesel-electric Stril Mariner is a good example. Another vessel that is setting new standards is the inland waterways cargo ship the M/V Anda. Visscher Scheepsreparatie B.V. completed the China-built 443 ft hull. With an 37.5 ft beam and a depth of 11.7 ft the boat has a depth in the hold of 14 ft including the combing. A pair of Cummins QSK38-M engines supplied by De Groot Scheepstechniek B.V. provides main propulsion. Producing a continuous duty rating of 895 kW (1200 HP) at 1800 RPM. These engines employ a modular common rail fuel system to provide constant high injection pressure regardless of engine speed or load conditions. In addition to reduced noise and vibration as well as idle stability and improved low-end torque, this feature contributes to the engine meeting EU Stage IIIA, IMO and U.S. EPA Tier 2 requirements for reduced emissions.
 
The owner, J. Verdonk, and the builders of the M/V Anda have taken the emission reduction a whole step further by adding an after treatment system to the engine exhaust. Two sets of the multi component after treatment system, one on each engine, were supplied and installed by Emitech B.V.. Each system consists of a NOx Selective Catalytic Reduction Catalyst (SCR), a NOx control unit, ureum tank, two pieces of urea doseur, a NOx sensor and a NOx buster Bluejet G2 control. Each engine exhaust was also fitted with a DPF Diesel Particulate Filter with a burner and control unit.
 
In January 2010 test were carried out to measure the emissions of the two engines with the after treatment relative to without after treatment. The results were spectacular. In tests carried out by TNO Industrie en Techniek under the protocols of ISO 8178 (see below) the after treatment system showed that on both engines the NOx emissions are reduced on the weighted test points by almost 90%. (port engine 87% and starboard engine 88%) This brings the NOx emissions on both engines to well below the norm of 2 g/kWh for new ships. These numbers result in the M/S Anda being named the cleanest vessel in the Netherlands and perhaps all of Europe.
 
The ISO 8178 is an international standard designed for a number of non-road engine applications. It is used for emission certification and/or type approval in many countries worldwide, including the USA, European Union and Japan. Depending on the legislation, the cycle can be defined by reference to the ISO 8178 standard, or else by specifying a test cycle equivalent to ISO 8178 in the national legislation (as it is the case with the U.S. EPA regulations).

Maritime Reporter June 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Environmental

Port of New Orleans Goes Green

Green Marine, a North American environmental certification program for the marine, port and terminal industry, officially recognized the Port of New Orleans recently as a certified Green Port.

AkzoNobel’s Carbon Credits Methodology Wins Award

AkzoNobel’s landmark carbon credits methodology for the shipping industry has won the Best Offsetting Project award in the 2015 Voluntary Carbon Market Rankings.

GEORG FORSTER Calls Southampton for the First Time

The CMA CGM Group announced that the CMA CGM GEORG FORSTER called England for the first time on July 6th.    With its 1,305 ft. (398m) length and 177 ft. (54m) width,

Marine Power

Research Vessel Concept a first for Voith

The new fisheries research vessel of the Shanghai Ocean University will be a first for Voith in several respects.   It is the first fisheries research vessel

MTU Powers RSN Navy's Littoral Mission Vessel

MTU to power eight Republic of Singapore Navy’s new patrol vessels. Employees and guests, including senior representatives from the Republic of Singapore Navy (RSN) and Ministry of Defence,

Hercules-2 Officially Launched

MAN Diesel & Turbo, Wärtsilä and Winterthur Gas & Diesel to collaborate on major, EU-funded project.   A major cross-industry initiative led by MAN Diesel & Turbo,

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Naval Architecture Port Authority Salvage Ship Electronics Ship Repair Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2150 sec (5 req/sec)