Zhang Yuming, Yang Yang, Cao Qingfeng, Wang Yi, Fan Jia-Ning, Chen Hu, Wang Xin, Wang Fei, Zhou Yu, Quan Mengfan
School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, 710055 Xi'an, PR China.
School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, 710055 Xi'an, PR China; State Key Laboratory of Green Building, Xi'an University of Architecture and Technology, 710055 Xi'an, PR China.
J Hazard Mater. 2024 Dec 5;480:135812. doi: 10.1016/j.jhazmat.2024.135812. Epub 2024 Sep 11.
The oil mist particles cyclically emitted during the cutting process are a serious health hazard for workers in machine plants. Affected by emission parameters and seasonal factors, the dynamic distribution of oil mist particles in the workers' breathing zone is not yet clear, and suitable ventilation optimization is yet to be proposed. This paper investigates the dynamic distribution of oil mist particles in the workers' breathing zone and ventilation optimization by numerical simulation. It was found that the accumulated value, peak value, and duration of peak of the oil mist particle concentration in the breathing zone are 1.5 ∼ 5 x, 3 ∼ 7 x, and 2 ∼ 3 x higher than other conditions, respectively, influenced by the emission parameters of the cutting process. Due to the interference of air conditioning airflow, the concentration is high in winter with obvious periodic fluctuations (7 x), while it is relatively low and stable (2 x) in summer. Parallel flow air curtains can decrease the concentration of oil mist particles in the breathing zone by 42.1 % ∼ 67.9 %, with a 13 % ∼ 50 % increase in energy consumption. This paper provides guidance for clarifying the dynamic distribution of pollutants at workers' post in industrial buildings, as well as the protection of workers' breathing environment.
切削加工过程中周期性排放的油雾颗粒对机械加工厂的工人健康构成严重危害。受排放参数和季节因素影响，油雾颗粒在工人呼吸区域的动态分布尚不清楚，且有待提出合适的通风优化方案。本文通过数值模拟研究了油雾颗粒在工人呼吸区域的动态分布及通风优化。研究发现，受切削加工排放参数影响，呼吸区域内油雾颗粒浓度的累积值、峰值及峰值持续时间分别比其他工况高1.5～5倍、3～7倍和2～3倍。由于空调气流的干扰，冬季浓度较高且有明显的周期性波动（7倍），而夏季则相对较低且稳定（2倍）。平行流空气幕可使呼吸区域内油雾颗粒浓度降低42.1%～67.9%，能耗增加13%～50%。本文为明确工业建筑中工人岗位处污染物的动态分布以及保护工人呼吸环境提供了指导。
