Performance evaluation for a coupled push–pull ventilation and air curtain system to restrict pollutant dispersion in a factory building

Wang, Jihong; Huo, Qiannan; Zhang, Tengfei; Liu, Fei; Wang, Shugang; Li, Zhixiong; Jiang, Shaowei

doi:10.1016/j.jobe.2021.103164

Cited by 5 publications

(1 citation statement)

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“…The improved displacement ventilation system, with the aid of thermal plumes, can reduce the oil-mist concentration by 70% in the work zones. Wang et al [24] proposed a coupled uniform push-pull ventilation and air curtain system, but the system causes serious dispersion of oil mist in the condition of high air jet velocity and low push-pull airflow rate. Despite the existing research on ventilation strategies to reduce the concentration of oil mist, knowledge is still missing on different installation positions of supply and return air outlets, the efficiency of other ventilation strategies, including single-side transverse and bilateral transverse ventilation, and especially the spatial distribution of oil mist under different ventilation schemes.…”

Section: Introductionmentioning

confidence: 99%

Indoor Particulate Matter Transfer in CNC Machining Workshop and The Influence of Ventilation Strategies—A Case Study

Yao

Qiu

et al. 2023

Sustainability

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Particulate matter in Computer Numerical Control (CNC) machining workshop is harmful to workers’ health. This paper studies particulate matter transfer and the performance of various ventilation strategies in a CNC machining workshop. To obtain the boundary condition of the particle field, instruments were installed to obtain the particle size attenuation characteristics and source strength, respectively. The results show that the 99% cumulative mass concentration of particles is distributed within 1.5 μm, and the release rate of particles from the full enclosure. Next, the indoor flow field and particle field were simulated by numerical simulation with the measured boundary conditions. The working area’s age of air, particle concentration, and ventilation efficiency were compared between four displacement ventilation methods and one mixed ventilation method. The results show that the working area’s mean particle concentration and ventilation efficiency under longitudinal displacement ventilation is better than other methods. At the same time, the mean age of air is slightly worse. In addition, mixed ventilation can obtain lower mean age of air, but the particle concentration is higher in the working area. The bilateral longitudinal ventilation can be improved by placing axial circulation fans with vertical upward outlets in the center of the workshop.

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Section: Introductionmentioning

confidence: 99%