Determination of Tunnel Flow Coefficient for Car Emission Rate
| Autor: | Taehyoung Lee, Sungwoon Jung, Taekho Jung, GyutaePark, Myoungki Song, Wunseon Choi, Seounghwan Lee, Seokjun Seo, Yongmin Lee, Sun Moon Kim, Kyunghoon Kim, Eun Young Kim, Jounghwa Kim, Jongmin Lee, Min-Suk Bae |
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| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
010504 meteorology & atmospheric sciences Climate change 010501 environmental sciences Environmental Science (miscellaneous) Spring (mathematics) Atmospheric sciences 01 natural sciences Pollution Wind speed Atmosphere Traffic volume Environmental Chemistry Environmental science Flow coefficient 0105 earth and related environmental sciences |
| Zdroj: | Journal of Korean Society for Atmospheric Environment. 36:139-148 |
| ISSN: | 2383-5346 1598-7132 |
| DOI: | 10.5572/kosae.2020.36.1.139 |
| Popis: | 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 ㎥/vehicle·km in Summer, Fall, Winter, and Spring, respectively. The overall average of tunnel flow coefficient was determined as 259 ㎥/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. |
| Databáze: | OpenAIRE |
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