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Performance and Comparison of Tracer Gas Methods for Measuring Air Flows in Two-Zone Buildings 示踪气体法测量两区建筑空气流量的性能和比较
讨论了测量两区建筑中分区间空气流动的三种方法:单室初始注入一个示踪剂,两室重复注入一个示踪剂,两室初始注入两个示踪剂。对每种方法都进行了理论分析。误差分析和数值模拟证明了所研究方法的不同性能。为了测试上述方法的准确性,建立了一个实验室规模的双室物理模型。该模型配备了泵和流量计,用于确定和测量每一个所需的空气运动。将实验确定的气流与上述示踪气体方法的评估结果进行了比较。结果表明,方法1对测量噪声非常敏感,因此不如方法2和3。 方法2和3都得到了满意的结果。虽然方法2比方法3需要更少的示踪气体设备,但需要更长的测量周期才能达到相同的精度。关键词:性能、比较、示踪剂、气体、测量、建筑物、空气运动、房间、计算、测试、精度、实验室测试、空气流量、空气流量、分区:研讨会,ASHRAE Trans。1991年,第97卷,第2部分
Discusses three methods for measuring interzonal air movement in two-zone buildings - the initial injection of one tracer into a single room, repeated injection of one tracer into two rooms, and initial injection of two tracers in two rooms. Theoretical analyses for each of these methods are presented. Error analyses and numerical simulations demonstrate the different performances of the methods under investigation. For the purpose of testing the accuracy of the above methods, a laboratory-scale physical model with two chambers has been built. The model is equipped with pumps and flowmeters that establish and measure every desired air movement. Comparisons of experimentally established air flows with evaluation results from the above-mentioned tracer gas methods are performed. Results show that method 1 is very sensitive to measurement noise and therefore inferior to methods 2 and 3. Methods 2 and 3 both yield satisfactory results. While method 2 requires less tracer gas equipment than method 3, it needs longer periods of measurement to achieve the same accuracy.KEYWORDS: performance, comparing, tracers, gas, measuring, buildings, air movement, rooms, calculating,testing, accuracy, laboratory testing, air flow, air flow rate, zones
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