Two-stroke gas engine for tier III limits
Wärtsilä reports successful trials of its latest low-speed gas engine technology. The trials were conducted on the RTX5 test engine at the company's facilities in Trieste, Italy.
Wärtsilä says it demonstrated that the engine performance fully complies with the upcoming IMO tier III NOx limits, thereby setting a new benchmark for low-speed engines running on gas. The tests with the RTX5 engine will continue during the autumn and winter of this year, and into 2012.
The RTX5 2-stroke test engine is part of Wärtsilä's two-stroke dual-fuel gas engine technology development programme, which the company says is an important part of its strategy to lower emissions, increase efficiency and to develop its low-speed engine portfolio to include dual-fuel gas engines alongside its medium-speed dual-fuel engines.
"The decision to initiate this project was announced in February 2011, just seven months ago. The fact that we have already conducted a successful test shows that our gas engine technology is at the forefront of meeting the future needs of shipping, a future that stipulates more stringent environmental regulation. This further highlights Wärtsilä's leading in-house know-how, professional approach and overall competence in this field," says Lars Anderson, vice president, Wärtsilä Ship Power Merchant.
Wartsila says that it can claim longer experience than any other company with gas-fuelled low speed marine engines. In 1973 the LNG Carrier Venator was equipped with a low-speed dual-fuel 7RNMD90 Sulzer engine. Although the installation was successful in all aspects, Wärtsilä says that the market was not then ready to endorse the concept. Still convinced of the potential for natural gas, Wärtsilä developed and successfully tested a high-pressure two-stroke gas engine in 1986, but only now is the concept ready to be brought to the mainstream market.
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