Air Distribution from an Ergonomic
Journal Title: Ergonomics International Journal - Year 2017, Vol 1, Issue 2
Abstract
Conventional total-volume ventilation theory treats the air in a room as well-mixed. Therefore, to limit the concentrations of contaminants generated in a room, fresh air must be supplied to the room to dilute the contaminants [1]. Because of the so-believed mechanism of dilution, air distribution, i.e., the path of air entering, flowing and leaving the room is of less interest. Under most circumstances, for the conveniences of design and construction, both air supply and exhaust terminals (inlets and outlets) are positioned on the ceiling. Because of the Coandă effect, air short-circuiting between the inlets and outlets often happens. The so-called dilution effect may not be as effective as it would have been expected. In other words, the ventilation efficiencies could be significantly/substantially lower than the predictions. The purpose of control contaminant levels is for the people. The focus should be the air they inhaled, i.e., the indoor air quality in the breathing zone instead of elsewhere in the room.
Authors and Affiliations
Zhang Lin*
Keywords
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