For preserving the clean environment, NO(x) emission regulations are applied not only to the automotive engines but also to the marine engines. As everyone might know, IMO MARPOL ANNEX VI came into effect on 19th MAY 2005. However, emission level need to be reconsidered within five years from the ratification, it could be more stringent like current on-road engines. As for the particulate matter emission, percentage of particulate matter emitted from the marine engine became high, because particulate from the other sources are reduced by engine modification and the state-of-the-art technologies. Currently, some regulations for marine engines stipulate acceptable levels of particulate emissions based on the mass collected on filters obtained by sampling in diluted exhaust. From the point of view of human health, so-called nano-particle (d<50nm) is thought to be nuisance because it could reach deeper lung tissue. New regulation for PM number density is under review in PMP (Particle Measurement Programme). If particulate matter emission from marine engine were majority, it is quite important to know its emission trend. However, it is difficult to measure and evaluate particle size distribution in the exhaust gas, because it deeply depends on the measurement conditions. So, many researches have been done in this research field. A series of experiments were conducted on a medium speed research diesel engine which was designed with Yanmar's reliable technologies. Micro dilution tunnel was used for PM measurement with conventional filter method. EEPS (Engine Exhaust Particle Sizer) was also used to make real time particle size distribution measurements possible. The instruments yields data of particle size distribution for a particle size range from 5.6 to 560 nanometers. The data presented covers whole operating conditions including the operating modes of E3 and D2. Changes in PM emission are evident in the data from both EEPS and filters according to the variation in engine operating modes, such as speeds and loads. This illustrates that the physical characteristics of PM is highly dependent on the engine operating conditions. These results could give us a prospect of the future marine and stationary medium speed diesel engine from the point of view of particulate mater emission.
Physical characteristics of particulate matter emission from medium speed marine diesel engine
2007
9 Seiten, 14 Bilder, 2 Tabellen, 7 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
Physical characteristics of particulate matter emission from medium-speed marine diesel engine
British Library Conference Proceedings | 2007
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Kraftfahrwesen | 1990
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Online Contents | 1997
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