| Summary: | 碩士 === 國立成功大學 === 環境工程學系碩博士班 === 94 === The main idea of this research is to measure gaseous pollutant, particles, and flow of vehicles in tunnels, and to calculate emission factors of different kind of vehicles with data collected in tunnel sampling.
In order to get emission factors of different kind of vehicles, we chose Don-Men tunnel in Tainan city for motorcycles, and Chung-Liau tunnel in southern 2nd expressway for LDV and HDV(light-duty vehicles and heavy-duty vehicles)as our experiment spots.
We found that the concentration of particles is up to 1.8×109count/m3; concentration of CO is 46.4ppm as highest inside the Don-Men tunnel. The characteristic nano-particle size emitted by motorcycles lays on 28.5 and 56.2 nm. The emission factor of CO, CO2, NO, and SO2 are 5.17±1.62, 109.76±10.11, 0.05±0.01, 0.006±0.003 g/km respectively. We calculated fuel-based emission factors as well. The results are 1.25±0.40, 0.15±0.07 g/kg-fuel with NO, SO2 respectively.
We also found the highest concentration of particles inside Chung-Liau tunnel is 3.0×108count/m3. After separating data measured by SMPS, we got three characteristic peak. The mean of them are 21.6nm, 11nm and 68.4nm respectively. Because of the ventilation system, condition of diffusion, and the assumption we made as we calculated emission factors are not too match with truth, we got bad results. They are much different from data listed by other researches before.
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