Demonstrating the use of absolute pressure sensors for monitoring stack-driven pressure differences in high-rise buildings

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 (zPstack) in high-rise buildings. To demonstrate the feasibility of using pairs of AB pressure sensors to monitor zPstack, 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 zP 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 zP levels compared to induced zP levels below 5 Pa. However, the DP gauges present increasing repeatability values with the increase of induced zP levels, indicating their relatively inaccurate measurement results under high induced zP 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 zPstack in high-rise buildings, facilitating the diagnosis of stack effect and related issues.

키워드