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Time-dependent efficiency of air cleaners for gas-pollutants: an attempt at validating a predictive model

机译:气体污染物空气清洁剂的时间依赖效率:试图验证预测模型

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Many portable air cleaners (ACs) use adsorbents for the treatment of gas pollutants. A particular feature of adsorbents is their gradual saturation. This makes the assessment of ACs performance difficult: the popular "Clean Air Delivery Rate" index (CADR), for instance, only gives information on the initial efficiency of an AC. In a previous work, we have proposed a method based on the measurement of the breakthrough curve (BTC) of pollutants in the adsorbent. Coupling the BTC with a balance equation for pollutant mass in a room allows building a model capable of predicting the effect of an AC as a function of time. The performance of ACs can then be compared in terms of both initial efficiency and long-term behaviour. In this work, we shall present an attempt at validating this concept against experimental data acquired on commercial equipment. The BTCs can in theory be measured on a small-scale sample or on the full-size adsorbent assembly of an AC. Both approaches will be compared. Characterisation of a test chamber by tracer gas will be reported. Pollutant concentration histories measured in this chamber will be compared to model predictions. Aknowledgement: The authors are grateful to Guard Industrie for financial support.
机译:许多便携式空气清洁剂(ACS)使用吸附剂来治疗气体污染物。吸附剂的特定特征是它们逐渐饱和。这使得ACS性能的评估困难:例如,流行的“清洁空气输送率”指数(CADR)仅提供有关AC的初始效率的信息。在以前的工作中,我们提出了一种基于测量吸附剂中污染物突破性曲线(BTC)的方法。将BTC与房间中的污染物质量的平衡方程耦合允许构建能够预测AC作为时间函数的效果的模型。然后可以在初始效率和长期行为方面进行ACS的性能。在这项工作中,我们将在验证对商业设备上获得的实验数据验证这一概念的尝试。理论上可以在小型样品或AC的全尺寸吸附组件上测量BTC。两种方法都将进行比较。将报告示踪气体的测试室的表征。将在该腔室中测量的污染物浓度历史与模型预测进行比较。 AKNOWEMEND:作者感谢卫队的财务支持。

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