Wärtsilä’s solutions are customized to specific ship design and operational requirements to ensure maximum efficiency, reliability and environmental  performance over the entire lifecycle of the installation. Examples of Wärtsilä’s achievements in environmental care are RT-flex engines, dual-fuel engines for LNG carriers and environmentally friendly sterntube sealing systems.

IMO NOX EMISSIONS AND WÄRTSILÄ ENGINES

The Annex VI of the MARPOL 73/78 convention entered into force on 19 May 2005. All Wärtsilä engines included in the portfolio comply with the NOX limit specified in the Annex.

The exhaust emissions regulations in the Annex VI of the MARPOL 73/78 convention are now referred to as IMO Tier I. In April 2008, the Marine Environment Protection Committee (MEPC) of IMO approved proposed amendments to the MARPOL Annex VI regulations. These specify further NOX emission limits to be known as IMO Tier II and Tier III. Under IMO Tier II, the NOX emission limit for engines installed in ships constructed on or after 1 January 2011 would be reduced, according a speed-dependent function, about 20% below the actual IMO Tier I (see chart).

Under IMO Tier III, the NOX emission limit for engines installed in ships constructed on or after 1 January 2016 would be reduced, according a speeddependent function, 80% below the actual IMO Tier I (see chart), when the ship is operating in a designated Emission Control Area. Outside a designated Emission Control Area, Tier II limits apply.

Wärtsilä will adapt its engines to comply with the new upcoming NOX emission regulations.