【作者】

Jorgen B. Nielsen，Sergey Ushakov

【摘要】

论文已在中国上海举行的2013年CIMAC大会上发表，论文的版权归CIMAC所有。The rising concern for particulate matter (PM) emissions from maritime transport together with the adverse health effects associated with PM emissions have lead to several studies reporting PM emissions from marine diesel engines (MDE) running on marine heavy fuel oils. One metric among other that is being presented is the particle size distribution(PSD). Measurement of PSDs is associated with challenges related to controlling formation of nucleation mode particles by the use of dilution systems. These challenges are even greater when measuring on MDEs running on HFO due to the high sulfur content normally found in HFO. Sulfur is associated with enhanced formation of nucleation mode particles and the high sulfur con-centration in HFO requires an adapted dilution system to enable control over the nucleation process. In this study the authors is investigating the effect of dilution parameters on the formation of nucleation mode particles as well as adopting the dilution system for measurement of only solid PSDs. Measurement of solid PSDs gives higher repeatability as solid particles are regarded not to be affected by the dilution setting. During our experiments large variations in PSDs were observed when the effect of dilution parameters was investigated. Both changes to the particle size and in the particle concentration were found. Adapting the dilution system for measurement of only solid particles was successful. The system was able to measure only solid particles with very good repeatability for almost the entire size range measured. Compared to measurements on low sulfur fuels higher dilution ratios and significantly higher dilution air temperatures are needed. In this study dilution air temperature of 400 ℃ was applied while results indicate that 300℃ would be sufficient with as long as the primary dilution ratio is above 5. The high effect of dilution parameters on the PSDs highlights a need for defining and stating the dilution parameters when presenting PSD results to enable comparison and interpretation of the results.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

返回