초록 열기/닫기 버튼
PM2.5 is well known to be greatly affected by the vehicle emissions, which can affect climate change and the human body. Recently, the number of vehicles has been increasing continuously in Korea. However, there are still very few studies on the relationships between chemical components actually emitted from vehicles. Therefore, this study aims to analyze the actual tunnel flow coefficient for car emission rate based on the measurements of individual physical parameters (e.g., tunnel wind speed and traffic volume). As a result, the average tunnel flow coefficient were shown as 187, 335, 294, and 219 m3/vehicle·km in Summer, Fall, Winter, and Spring, respectively. The overall average of tunnel flow coefficient was determined as 259 m3/ vehicle·km for vehicle emission rate. The emission factors can apply to investigate the both seasonal and chemical unit of vehicle emissions in real atmosphere, which can contribute to calculate the total road emissions related to their environmental effects.
