Wärtsilä Engine Achieves Emissions Certification

Thursday, November 29, 2007
Picture of the Wärtsilä 26 engine

Wärtsilä has achieved Tier 2 marine certification under the emissions control legislation of the US EPA (United States Environmental Protection Agency) for the Wärtsilä 26, in-line marine diesel engine type. This is the latest step in Wärtsilä’s continuing, proactive development of its engines for lower exhaust emissions and reduced environmental impact. The Wärtsilä 26 engine is a four-stroke heavy-duty marine engine of 260 mm cylinder bore by 320 mm piston stroke built in in-line and Vee-form configurations. It covers a power range of 1950–5440 kW (2650-7393 bhp), and is popular in a wide range of marine applications. More than 800 engines have been delivered since the introduction in 1996 and there are engines with more than 60,000 running hours. With a swept volume of 17 liters per cylinder the Wärtsilä 26 is classified by the EPA as a category 2 engine. Since 1 January, 2007 US-flag vessels powered by category 2 engines are required to meet the Tier 2 requirements.

For in-line engines the US EPA Tier 2, category 2, required emission levels for total hydrocarbons and nitrogen oxides (NOx) are less than 8.7 g/kWh. This is a reduction of NOx emissions of more than 30% compared with the IMO limit in Annex VI of the MARPOL 73/78 convention. In addition, the US EPA legislations set limits for carbon monoxide (CO) of 5.0 g/kWh and particulate matter (PM) of 0.5 g/kWh. Testing of Wärtsilä 26 engines for compliance with the US EPA Tier 2 legislation was successfully performed in the Trieste engine laboratory in Italy with fuels meeting the EPA requirements. The emission levels have been lowered largely by reducing the maximum combustion temperatures. This has involved a combination of measures: Miller timing, optimization of the combustion chamber, and optimization of the fuel injection equipment. In this way, the emissions been reduced with a marginal decrease in efficiency.

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

Ports

Viking Orders 2 Liebherr Cranes

An LR 1300 with super lift equipment and an LR 1160 crawler crane will strengthen the fleet of Viking Cranes. The Tallinn-based company with branch offices

KPCT Launches New Gulf Service

Containerized volumes are steadily increasing on the East Coast of India. Keeping pace with the growth, Krishnapatnam Port Co. Ltd. (KPCT) now offers a new service to the Gulf sector.

Mayor Garcetti on Ratification of Port Labor Contract

International Longshore and Warehouse Union members have ratified a five-year contract governing pay and work rules at 29 West Coast ports, including those of Los Angeles and Long Beach.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Navigation Offshore Oil Pod Propulsion Port Authority Salvage Ship Repair 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: 0.1091 sec (9 req/sec)