Aftertreatment Systems for Marine Applications:Practical Experience from the Perspective of a Classification Society
Recently the Marine Environmental Protection Committee (MEPC) of the International Maritime Organisation (IMO) adopted guidelines addressing additional aspects to the NOx Technical Code 2008 with regard to particular requirements related to marine Diesel Engines fitted with Selective Catalytic Reduction (SCR) systems. Following these guidelines a combined engine and SCR may be tested separately in cases where the combined system can neither be tested on a test bed due to technical and practical reasons nor an on board test can be performed fully complying with the test requirements detailed in the NOx Technical code 2008. The certification procedure to be processed in such instances has been referred to as the ’Scheme B approach’. In particular, starting from January 1st,2016, when the third stage of emission limits for nitrogen oxides (Tier III) shall apply to new buildings when operating in an Emission Control Area (ECA), the new guideline and the Scheme B approach will impose a strong challenge for engine and SCR manufacturers, ship operators and certifiers (Recognised Organisations / classification societies) from a technical and operational point of view. Germanischer Lloyd (GL), acting as a Recognised Organisation for more than 90 flag states, has a strong interest in a lean and inviolable introduction of the legislation imposed by IMO. Thus, GL has started to accompany and supervise the design and installation of Marine Diesel Engines fitted with SCR systems applying the Scheme B approach at an early stage on a number of pilot installations in order . Moreover, GL’s accredited laboratory for ’Exhaust Emission Measurement and Chemical Analyses’ has long lasting experience in measuring the exhaust gas emissions from Marine Diesel Engines fitted with SCR systems on board of vessels which have to follow the Swedish NOx tax regulation and therefore has a deep insight into the long term in-service experience SCR manufacturers and ship owners have with this kind of systems. This presentation aims to introduce latest experiences in measuring, survey and certification of gaseous emissions from Marine Diesel Engines fitted with SCR. The presentation evaluates technical solutions for exhaust gas aftertreatment systems from the perspective of a classification society with a strong focus on its technical, operational, organizational and administrative challenges. In particular the applicability of the new ’Scheme B’ approach provided by IMO concerning the combined certification of engines and SCR systems tested separately is examined critically on the basis of a number of practical examples.
Fabian Kock
Germanischer Lloyd,Germany
国际会议
上海
英文
1-13
2013-05-13（万方平台首次上网日期，不代表论文的发表时间）