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首页> 外文期刊>Building and Environment >Effect of charcoal equipped HEPA filters on cabin air quality in aircraft. A case study including smell event related in-flight measurements
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Effect of charcoal equipped HEPA filters on cabin air quality in aircraft. A case study including smell event related in-flight measurements

机译：装有木炭的HEPA过滤器对飞机机舱空气质量的影响。一个案例研究，包括与气味事件相关的飞行中测量

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Cabin air quality (CAQ) of aircraft is an important issue for both comfort and safety of occupants during flight. Due to high impact of carbon dioxide a high ventilation rate in the aircraft cabin is essential for life saving. However, external and internal sources of potential pollutants may also affect the CAQ. Subjective smell perception occasionally results in guidelines-regulated actions by pilots, independent of the real chemical burden. Installation of novel filtration units is presumed to improve CAQ and to reduce smell. The present study aimed to investigate the CAQ on Airbus A321 aircraft equipped with a charcoal filter in addition to the standard high efficiency particulate air filter. Overall, a reduction of approx. 30% was observed for (S)VOCs in the study. For the first time, a reported "smell event" and diversion of the aircraft was accompanied with comprehensive measurements, yet without detection of noticeable amounts of pollutants. During another flight connected with a de-icing procedure on ground, elevated levels of various pollutants were measured in the cabin air. Despite subjective perception of smell and measurement of unusually high levels of VOCs and aldehydes in the cabin air, no complaints about CAQ had been reported by the crewmembers during this flight. These diametric cases suggest that decision-making by the crewmembers during flights may not always be supported by experimentally generated data. Subjective perception alone of uncommon smell may not be a reliable indicator of harmful or toxic chemical pollution in aircraft and should not be used for decision-making.
机译：飞机的机舱空气质量（CAQ）对于飞行期间乘员的舒适性和安全性都是重要的问题。由于二氧化碳的强烈影响，机舱内的高通风率对于挽救生命至关重要。但是，潜在污染物的外部和内部来源也可能影响CAQ。主观嗅觉偶尔会导致飞行员根据准则进行操作，而与实际化学负担无关。据推测，安装新型过滤装置可改善CAQ并减少气味。本研究旨在调查除标准高效微粒空气过滤器外还配备木炭过滤器的空中客车A321飞机的CAQ。总体而言，减少了约。在研究中观察到30％的（S）VOC。首次报告的“气味事件”和飞机改道伴随着全面的测量，但没有发现明显数量的污染物。在另一次与地面除冰程序有关的飞行中，机舱空气中各种污染物的含量升高了。尽管主观嗅觉并在机舱空气中测量到异常高的VOC和醛含量，但机组人员在这次飞行中未收到有关CAQ的投诉。这些直截了当的案例表明，机组成员在飞行中的决策不一定总是得到实验生成的数据的支持。仅凭主观感觉就能闻到不常见的气味可能不是可靠的指示，表明飞机中有害或有毒的化学污染，因此不应将其用于决策。

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