Country-specific greenhouse gas emission factors of diesel-electric locomotive in Korea

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>This study developed the country-specific greenhouse gas emission factors as the Tier 3 level defined by IPCC guideline for the diesel-electric locomotives that have been currently being operated as line-haul railway traffic in the domestic transport sector of Korea. In order to apply the operating conditions as more specific data for the Tier 3 approach, the concentrations of CO<SUB>2</SUB>, N<SUB>2</SUB>O, and CH<SUB>4</SUB> were investigated using the notch changes of diesel-electric locomotive under load tests. The measurement results found, for the greenhouse gas emissions in accordance with the power generated from diesel consumption, that the CO<SUB>2</SUB> were 282g/kWh while idling and 701g/kWh at the maximum output (notch 8), respectively. In addition, CH<SUB>4</SUB> were 0.0394g/kWh while idling and 0.0103g/kWh at the maximum output (notch 8), and N<SUB>2</SUB>O were 0.0181g/kWh while idling and 0.0107g/kWh at the maximum output (notch 8), respectively. The country-specific greenhouse gas emission factors were calculated through analyzing the activity data for the use frequency percentage of notch according to the operation mode at the travel service section of the main domestic routes using the diesel-electric locomotives. Finally, the greenhouse gas emission factors were proposed to be CO<SUB>2</SUB> =442g/kWh, CH<SUB>4</SUB> =0.0241g/kWh, and N<SUB>2</SUB>O=0.0136g/kWh. This study is the first attempt to develop the country-specific greenhouse gas emission factors considering of the operation conditions of railcars in Korea.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Greenhouse gas emission factors were first developed for diesel-electric locomotives in Korea. </LI> <LI> The Korean-specific emission factors reflecting operation conditions were developed. </LI> <LI> As the power and diesel consumption increased, the CO<SUB>2</SUB> and N<SUB>2</SUB>O emissions increased. </LI> <LI> The CH<SUB>4</SUB> emissions showed no tendency with the engine power and diesel consumption. </LI> <LI> The frequency percentage of using engine load during locomotives’ journey was investigated as a weighting factor. </LI> </UL> </P>