Estimation of emission rates from diesel locomotive engines
Up to the present time, many methods to estimate emissions from a particular diesel engines have wholly depended on the quality of diesel fuel consumed. Then, the recommended emission factors were normalized by fuel consumption, and further total activity was estimated by the fuel consumed. One of main purposes in the study is newly to develop emission factors for the railroad diesel rolling stock (RDRS) and to estimate a total amount of major gaseous pollutants from the RDRS in Korea.
In this study, a emission factor for the RDRS, so called the KoRail mode (the Korean Railroad Mode) has been developed on the basis of analyzing the driving pattern of the Gyeongbu-Line especially for the line-haul mode. Total exhaust emissions of by KoRail mode in Korea were estimated by 10,960 tons of NOx, and 4,622 tons of CO, and so on in the year of 2001. The emissions estimated by the USEPA mode were 2.6 times higher for NOx, and 1.6 times lower for CO than those by the KoRail mode. As a conclusion as one of the significant mobile sources for major gaseous pollutants and thus management plans and control stragegies for the RDRS must be established to improve air quality near future in Korea.