Effects of Various Parameters on Diesel PM Concentration Measured by Optical Method

摘要

For the effectiveness and high sensitiveness of application of Rayleigh-Debye measuring method some suggestions were summarized as conclusions of this study. a. The refractive indices and attenuation efficiency of aggregated PM emitted from marine diesel should be chosen at values of 1.85 and 0.4 to 0.7, respectively. b. Short wavelength of incident light seems to give good results for measurements and the higher the power of incident light sources becomes the higher sensitiveness of measuring system can be obtained. c. The GB-100R filter collects higher amount of PM mass concentration than that of PG-60 in almost conditions of engine loads and the application of this Rayleigh-Debye method instead of filters is recommended for measuring PM mass concentration at very low concentration zones.