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 September 2013 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Environmental

Fortum Buys Stake in Wave Power Startup

Finland's top utility, state-controlled Fortum, on Monday said it has acquired a 14 percent stake in Finnish wave energy developer Wello. Wello has developed

Cavernous Swiss Power Plant Undermined by Renewable Energy

Deep in a Swiss mountain, workers have blasted out a cathedral-sized hole for a power plant that will help keep Europe's lights on, but the profit outlook for the 1.

China's National Carbon Market to Start in 2016

China plans to roll out its national market for carbon permit trading in 2016, an official said Sunday, adding that the government is close to finalising rules

Marine Power

RIMPAC Exercise Puts LCS Through Paces

It was the middle of May, and the littoral combat ship Independence was operating out of San Diego, testing components of the mine warfare mission package. The mission is one that,

Wärtsilä Reshuffles Two Top Managers

The following appointments have been made in the management inform Wärtsilä Corporation: Mr Rakesh Sarin (59), B.Sc. (Eng.), has been appointed President of Power Plants,

MHI, IHI & DBJ Join Forces On Investments

Mitsubishi Heavy Industries, Ltd. (MHI), IHI Corporation and the Development Bank of Japan Inc. (DBJ) concluded a three-way formal agreement today on their respective

 
 
Maritime Careers / Shipboard Positions Navigation Offshore Oil Pipelines Port Authority Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | terms and conditions | 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: 0.1816 sec (6 req/sec)