In factories where high-risk chemical pollutants are treated, it is essential to anticipate response measures in the event of chemical pollutant leakage to minimize adverse health effects on workers. When high-risk liquid chemical pollutants are assumed to be leaked inside enclosed spaces, it becomes crucial to predict the non-uniform concentration distributions in enclosed spaces and evaluate the health impacts and risks of short-time exposure to prevent large-scale accidents. Therefore, we have developed an emergency ventilation system for controlling the inhaled contaminant dose of factory workers. In this study, assuming a worst-case scenario liquid chemical pollutant leak in an enclosed factory space, the advantages and performance of a hybrid ventilation system that combines displacement and push–pull type ventilation systems were numerically investigated. Installation of wall materials that facilitate photocatalytic oxidation (PCO) reactions for background passive concentration control was also discussed. Based on the demonstrative numerical analyses for a realistic factory space, push–pull type ventilation system was confirmed to effectively suppress chemical pollutant diffusion in enclosed spaces with a low ventilation rate. Wall materials with the PCO mechanism had a certain contribution to the control of peak concentration.

在处理高风险化学污染物的工厂中，必须预测化学污染物泄漏时的应对措施，以尽量减少对工人健康的不利影响。当假设高风险液体化学污染物泄漏到封闭空间内时，预测封闭空间内的非均匀浓度分布并评估短时间暴露对健康的影响和风险以防止大规模事故变得至关重要。因此，我们开发了紧急通风系统，用于控制工厂工人吸入的污染物剂量。在本研究中，假设在封闭的工厂空间中发生液体化学污染物泄漏的最坏情况，结合置换式和推拉式通风系统的混合通风系统的优点和性能进行了数值研究。还讨论了为背景被动浓度控制安装促进光催化氧化 (PCO) 反应的壁材料。基于对现实工厂空间的示范性数值分析，推拉式通风系统被证实可以有效抑制低通风率封闭空间中的化学污染物扩散。具有PCO机制的壁材对峰值浓度的控制有一定的贡献。基于对现实工厂空间的示范性数值分析，推拉式通风系统被证实可以有效抑制低通风率封闭空间中的化学污染物扩散。具有PCO机制的壁材对峰值浓度的控制有一定的贡献。基于对现实工厂空间的示范性数值分析，推拉式通风系统被证实可以有效抑制低通风率封闭空间中的化学污染物扩散。具有PCO机制的壁材对峰值浓度的控制有一定的贡献。