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Ventilation system with air recirculation is designed to conserve energy, yet at the same time may result in transporting hazardous substance among different rooms in the same building, which is a concern in indoor air quality control. There is a lack of effective methods to predict indoor contaminant distribution primarily because of uncertainty of the contaminant concentration in supply air which...
The age of air is a commonly used concept in evaluating indoor air quality (IAQ). This study investigated the age of air distribution and its influencing factors in multiple rooms ventilated by multiple AHUs with recirculation. A hypothetical case involving three rooms and two AHUs was thoroughly studied by using an effective numerical method. The results revealed that, for ventilation systems involving...
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