Comparative study on estimation methods for NOx emissions from a roadway |
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| Institution: | 1. Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China;2. Joint Institute for Nuclear Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA;3. Idaho National Laboratory, Idaho Falls, ID 83415, USA;4. Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China;5. Institute of Modern Physics, Chinese Academy of Science, Lanzhou, Gansu 730000, China;1. Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan;2. Department of Life Science Frontiers, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan;3. Department of Fundamental Cell Technology, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan;4. Boston Children''s Hospital, Harvard Medical School, Boston, MA 02115, USA;5. Department of Pediatrics, Tokyo Medical and Dental University, Tokyo 113-8519, Japan;6. Department of Dermatology, Wakayama Medical University, Wakayama 641-0012, Japan |
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| Abstract: | In order to estimate NOx concentration at road side areas, it is necessary to determine the NOx emissions from the automobile passing a road. There are two methods for estimation of NOx emission. One is calculated by the emission factor of automobile, driving mode and traffic volume. Another is a method based on the relation between NOx and tracer gas concentration of diffusion experiment.First, diffusion experiments by air tracer were conducted. They were carried out at two areas, one of which was an open area and the other was a highly-built-up area. In the experiment, traffic volume, NOx and tracer gas concentrations were measured simultaneously. However, the result obtained at the former area was used for this analysis.The NOx emission rate of the automobile was calculated from the data of traffic survey and tracer gas experiments and both results were compared. Three methods for estimation of NOx emission rate from traffic survey were employed in this study.From these results, it can be confirmed that both results are in agreement and well correlated, so these estimation methods are considered to be appropriate. |
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