A simple method of estimating air recirculation in ventilation systems
A simple method of estimating air recirculation in ventilation systems
复制标题
估算通风系统中空气再循环的简单方法
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
K. Ancker
中科院分区：
文献类型：
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作者：
C. Göthe;R. Bjurström;K. Ancker
提出了一种定量测量通风系统中空气总循环量的方法。根据示踪剂在三个明确的点上的浓度计算空气再循环，即外部空气中的本底浓度(C_1)、再循环空气中的示踪剂浓度(C_2)和再循环系统后入口空气中的示踪剂浓度(C_3)。再循环商根据以下公式计算：Q2/Q3=(C3−C1)/(C2−C1)。Q2=再循环风量；Q3=总进口风量，包括再循环风量。因此，流动之间的商与示踪剂浓度之间的商是相同的。该方法允许使用天然示踪剂(例如，出现在被检查建筑物中的污染物，例如二氧化碳)和人造示踪剂(例如，氟碳化合物12或六氟化硫)。该方法经过测试，效果良好。在这些测试中，示踪物是建筑物内呼出的空气和室内活动排放的二氧化碳。
A method for quantitative measurement of the overall air recirculation in ventilation systems is presented. The air recirculation is calculated from the concentrations of a tracer at three well-defined points, viz., the background concentration in outside air (C1), the tracer concentration in the recirculated air (C2), and the tracer concentration in the inlet air after the recirculation system (C3). The recirculation quotient is calculated according to the following formula: Q2/Q3 = (C3−C1)/(C2−C1). Q2 = recirculated airflow; Q3 = total inlet airflow including recirculated airflow. Thus, a quotient between flows is identical with a quotient between tracer concentrations. The method allows the usage of both natural tracers (e.g., contaminants, such as CO2, occuring in the examined building) and artificial tracers (e.g., fluorocarbon 12 or sulfur-hexafluoride). The method has been tested with good results. At these tests, the tracer was CO2 emitted from exhaled air and indoor activities in the buildings.