Yang Hsi-Hsien, Kumar Amit, Dhital Narayan Babu, Wang Lin-Chi, Wu Cheng-Hsu, Kamyab Hesam, Yusuf Mohammad
Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung, 413310, Taiwan.
Department of Environmental Science, Tribhuvan University, Patan Multiple Campus, Lalitpur, 44700, Nepal.
Sci Rep. 2024 Dec 28;14(1):31494. doi: 10.1038/s41598-024-83327-1.
Real-world emissions of particulate matter (PM) and smoke opacity were studied for an older-model diesel pickup truck during four types of driving tests, namely fixed-point test, snap-acceleration test, road test, and hill road test (uphill/downhill). A portable emissions measurement system (PEMS) and an opacimeter were used to measure real-time concentrations of PM and smoke opacity, respectively, and simultaneously. Correlation analysis showed a significant positive association between PM and opacity, suggesting the feasibility of using an opacimeter to estimate PM mass emissions from diesel vehicles. Additionally, regression analyses were performed to evaluate the relationship between opacity and PM mass concentration. The results of this study indicate that PM emission concentrations from older-model diesel vehicles can be estimated with a reasonable accuracy by using a smoke opacimeter, which is a relatively simple and cost-effective method of emission testing, as an alternative to sophisticated PM measurement instruments.
针对一辆旧型号柴油皮卡，在四种驾驶测试中研究了其颗粒物（PM）的实际排放量和烟度，这四种测试分别为定点测试、急加速测试、道路测试和山路测试（上坡/下坡）。使用便携式排放测量系统（PEMS）和不透光烟度计分别同时测量PM的实时浓度和烟度。相关性分析表明PM与不透光率之间存在显著正相关，这表明使用不透光烟度计估算柴油车辆PM质量排放量具有可行性。此外，进行了回归分析以评估不透光率与PM质量浓度之间的关系。本研究结果表明，使用不透光烟度计可以较为准确地估算旧型号柴油车辆的PM排放浓度，不透光烟度计是一种相对简单且经济高效的排放测试方法，可替代复杂的PM测量仪器。
