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초록

As an effective alternative to differential pressure (DP) gauges, pairs of absolute (AB) pressure sensors are always applied to monitor stack-driven pressure differences (∆Pstack) in high-rise buildings. To demonstrate the feasibility of using pairs of AB pressure sensors to monitor ∆Pstack, this study conducts comparative experiments across a single component and two components within the established multi-cell chamber, separately, performing the comparative analysis of two kinds of sensors under various induced ∆P levels. The results show that the pairs of AB pressure sensors present higher measurement performance at the floor level. In addition, the repeatability indicator is applied to evaluate measurement stability, and 1.52 Pa is regarded as the reference value for AB pressure sensor pairs, and only small deviations can be observed with the validation experiments. The pairs of AB pressure sensors can yield more accurate measurement results at higher induced ∆P levels compared to induced ∆P levels below 5 Pa. However, the DP gauges present increasing repeatability values with the increase of induced ∆P levels, indicating their relatively inaccurate measurement results under high induced ∆P levels. In particular, the field measurements in two actual high-rise buildings successfully validate that the mode value in the TDC distributions during a certain period can be regarded as the actual TDC value for the target component. This study clarifies feasibility and performance evaluation of using pairs of AB pressure sensors to monitor ∆Pstack in high-rise buildings, facilitating the diagnosis of stack effect and related issues. © 2024

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