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Assessment of air purification effect in sheltering houses equipped with ventilation systems after air pollution incidents

机译：空气污染事故发生后对装有通风系统的避难所的空气净化效果评估

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摘要

A key issue in the later stage of an environmental emergency is indoor air purification. This study investigates a reasonable ventilation strategy for indoor air purification in the later stage of an air pollution accident. Using a closed test chamber to simulate a sheltering house with a ventilation system, the deposition rates of aerosol particles were measured under both ideal and non-ideal conditions. Additionally, the actual turbulence state can be inferred by querying the optimal K-e in the beta-K-e, diagram proposed by this work. The main removal mechanism for particles within the range of 53.3-371.8 nm at an air exchange rate less than 1.19 h(-1) is deposition. A ventilation system based on a high-power exhaust pump causes a large turbulence, which results in the resuspension of particles outside the cumulative mode range with a 'sudden drop' in the deposition rate. In the later stage of an air pollution accident or in the case where outdoor particles do not contribute indoors, turning off other stirrers and fans and increasing the AER value of the ventilation system to more than 1.19 h(-1) can achieve the desired air purification effect. However, particle removal in the cumulative mode remains a challenge.
机译：环境紧急情况后期的关键问题是室内空气净化。这项研究调查了在空气污染事故后期对室内空气净化的合理通风策略。使用封闭的测试室模拟带有通风系统的避难所，在理想和非理想条件下都测量了气溶胶颗粒的沉积速率。另外，可以通过查询β-K-e的最佳K-e来推断出实际的湍流状态，该工作由该图提出。在空气交换速率小于1.19 h（-1）的情况下，在53.3-371.8 nm范围内的颗粒的主要去除机理是沉积。基于大功率排气泵的通风系统会引起大的湍流，这会导致颗粒重新悬浮在累积模式范围之外，并且沉积速率“突然下降”。在空气污染事故的后期，或者在室外没有颗粒进入室内的情况下，关闭其他搅拌器和风扇并将通风系统的AER值提高到1.19 h（-1）以上，即可获得所需的空气。净化效果。然而，以累积模式去除颗粒仍然是一个挑战。

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