Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
Environ Int. 2024 Aug;190:108939. doi: 10.1016/j.envint.2024.108939. Epub 2024 Aug 5.
To protect occupants in vehicle cabin environments from the health risks of high concentrations of particulate matter (PM), it is important to install vehicle cabin air filter (VCAF) to eliminate PM. In this study, we investigated the filtration performance of 22 VCAFs. Results showed that the minimum average filtration efficiency was 56.1 % for particles with a diameter of 0.1-0.3 μm, a pressure drop of 33.2-250 Pa at air velocity of 2.5 m/s, and the dust-holding capacity ranged from 5.8 to 19.4 g. In addition, as the filter area increased from 0.23 m to 0.50 m, the filtration efficiency for particles with a diameter of 0.1-0.3 μm increased from 56.7 % to 77.5 %, the pressure drop decreased from 96.1 to 62.5 Pa, and the dust holding capacity increased 2.7 times. Furthermore, we compared the service life of VCAF from 31 major Chinese cities and found that the service life varied greatly from maximum of 1730 h for Haikou to minimum of 352 h for Shijiazhuang. Considering occupant health risks, Beijing requires that VCAFs have PM filtration efficiency at least 88.1 %, and Liaoning requires minimum of 97.5 %. Hence, choosing the appropriate VCAF based on the atmospheric environment of different cities deserves our attention.
为了保护车内环境中的乘客免受高浓度颗粒物（PM）带来的健康风险，安装车辆座舱空气滤清器（VCAF）以去除 PM 非常重要。在这项研究中，我们研究了 22 种 VCAF 的过滤性能。结果表明，对于直径为 0.1-0.3μm 的颗粒物，平均最低过滤效率为 56.1%，在空气速度为 2.5m/s 时的压降为 33.2-250Pa，持尘量范围为 5.8-19.4g。此外，随着过滤面积从 0.23m 增加到 0.50m，直径为 0.1-0.3μm 的颗粒物的过滤效率从 56.7%增加到 77.5%，压降从 96.1Pa 降低到 62.5Pa，持尘量增加了 2.7 倍。此外，我们比较了 31 个中国主要城市的 VCAF 的使用寿命，发现使用寿命从海口的最长 1730h 到石家庄的最短 352h 变化很大。考虑到乘客的健康风险，北京要求 VCAF 的 PM 过滤效率至少为 88.1%，辽宁要求最低为 97.5%。因此，根据不同城市的大气环境选择合适的 VCAF 值得我们关注。
