Marine Log - March 2009 - (Page 27) EMISSIONS yield. Now this information is available in one comprehensive document.” ABS is preparing an informational booklet based on the study for release to the industry. The study gave special consideraPeter Tang-Jensen tion to the effects ABS Senior that emission Vice President reduction technoloTechnology gies could have on ship design and ship operation. For example, as an alternative to burning fuel oil with low sulfur content, operators may reduce SOx emissions with exhaust gas scrubbers. While it is significantly less expensive to install scrubbers during construction rather than to retrofit, some owners are reluctant to spend the money today when the acceptance of scrubbers in some regions, such as California, remains uncertain. Design considerations can also be made to reduce NOx emissions. Inengine technologies available for both new and existing engines include valvetiming adjustments, water injection or replacement of fuel oil valves. New engines can be designed to lower NOx www.marinelog.com MARCH 2009 MARINE LOG 27 http://www.donjon.com http://www.donjon.com http://www.marinelog.com
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