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Evaluation of air infiltration in a hub airport terminal: On-site measurement and numerical simulation

机译：枢纽机场航站楼空气渗透评估：现场测量和数值模拟

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摘要

Currently, many airport terminals are being newly built or retrofitted. They are often designed with large open spaces, and entrances are usually open due to the continuous flow of passengers, which results in severe air infiltration. This paper investigated air infiltration in a Chinese hub airport terminal during three typical seasons by on-site measurements and computational fluid dynamics (CFD) simulations. The air-velocity method with CFD simulation was acceptable for estimating air infiltration because of the relatively constant airflow driven dominantly by stack pressure in large spaces. However, the tracer gas method was found to be unsuitable due to small differences in concentration. The air change rate varied from 0.14 to 0.56 h(-1), in which the maximum value occurred in the winter daytime when space heating systems were in operation. Air infiltration caused 71% of the heat loss during the winter testing period, and 26% of the heat gain during summer. Furthermore, air infiltration in winter directly influenced thermal comfort in occupant zones (PMV = -2.58-0.55, with an average value of -1.2). Therefore, more attention should be focused on the research into air infiltration in large space buildings.
机译：当前，许多机场航站楼正在新建或翻新。它们通常被设计成具有大的开放空间，并且由于乘客的连续流动，入口通常是开放的，这导致严重的空气渗透。本文通过现场测量和计算流体力学（CFD）模拟研究了三个典型季节中中国枢纽机场航站楼的空气渗透情况。 CFD模拟的空气速度方法可以用来估计空气渗透，因为在大空间中，相对恒定的气流主要由烟囱压力驱动。然而，发现示踪气体法由于浓度差异小而不合适。空气变化率在0.14至0.56 h（-1）之间变化，其中最大值发生在冬季白天，当空间供暖系统运行时。空气渗透在冬季测试期间造成了71％的热量损失，而在夏季则造成了26％的热量损失。此外，冬季的空气渗透直接影响居住区的热舒适度（PMV = -2.58-0.55，平均值为-1.2）。因此，应将更多的注意力集中在大型空间建筑物的空气渗透研究上。

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