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Comparison of winter air infiltration and its influences between large-space and normal-space buildings
Building and Environment ( IF 7.4 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.buildenv.2020.107183
Xiaochen Liu , Xiaohua Liu , Tao Zhang , Ryozo Ooka , Hideki Kikumoto

Abstract Air infiltration brings challenges to energy saving and indoor air quality in buildings. Previous studies about air infiltration mainly focused on normal-space buildings, while less attention has been paid to large-space buildings, which are currently widespread. This study uses theoretical models to compare winter air infiltration in the two categories of buildings. The most common situation of winter air infiltration in normal-space buildings is the outdoor air through envelope cracks; however, that in large-space buildings is actually some unintentional openings (i.e., normally-opened windows/skylights, exterior doors for entrance, etc.). The calculation results indicate no noticeable difference in the air change rate of winter air infiltration between the two categories of buildings, which is also supported by field measurement data from the literature. Then, this paper discusses the different challenges faced by the two categories of buildings with the influence of air infiltration. A smaller shape coefficient of a large-space building (0.07–0.27 m-1) results in a higher proportion of heating load by air infiltration than that of a normal-space building (0.20–0.80 m-1). Besides, a smaller occupant number per volume of indoor space of a large-space building (1.6 × 10−4 to 1.2 × 10−2 person/m3) makes it less likely to be severely affected by indoor-originated air pollutants (indicated by CO2 concentration) than that of a normal-space building (1.3 × 10−2 to 2.1 × 10−1 person/m3).

中文翻译:

大空间与普通空间建筑冬季空气入渗及影响比较

摘要 空气渗透给建筑节能和室内空气质量带来挑战。以往关于空气渗透的研究主要集中在普通空间建筑上,而对目前普遍存在的大空间建筑关注较少。本研究使用理论模型来比较两类建筑物的冬季空气渗透。正常空间建筑冬季空气渗入最常见的情况是室外空气通过围护结构裂缝;然而,在大空间建筑中,实际上是一些无意的开口(即常开的窗户/天窗,入口的外门等)。计算结果表明,两类建筑冬季空气入渗的换气率无明显差异,文献中的现场测量数据也支持这一点。然后,本文讨论了受空气渗透影响的两类建筑物所面临的不同挑战。与普通空间建筑(0.20-0.80 m-1)相比,大空间建筑(0.07-0.27 m-1)的较小形状系数导致空气渗透的热负荷比例更高。此外,大空间建筑每单位体积室内空间的居住人数(1.6 × 10−4 至 1.2 × 10−2 人/m3)使其不太可能受到室内源空气污染物的严重影响(由CO2 浓度)比普通空间建筑物的浓度(1.3 × 10−2 至 2.1 × 10−1 人/m3)。与普通空间建筑(0.20-0.80 m-1)相比,大空间建筑(0.07-0.27 m-1)的较小形状系数导致空气渗透的热负荷比例更高。此外,大空间建筑每单位体积室内空间的居住人数(1.6 × 10−4 至 1.2 × 10−2 人/m3)使其不太可能受到室内源空气污染物的严重影响(由CO2 浓度)比普通空间建筑物的浓度(1.3 × 10−2 至 2.1 × 10−1 人/m3)。与普通空间建筑(0.20-0.80 m-1)相比,大空间建筑(0.07-0.27 m-1)的较小形状系数导致空气渗透的热负荷比例更高。此外,大空间建筑每单位体积室内空间的居住人数(1.6 × 10−4 至 1.2 × 10−2 人/m3)使其不太可能受到室内源空气污染物的严重影响(由CO2 浓度)比普通空间建筑物的浓度(1.3 × 10−2 至 2.1 × 10−1 人/m3)。
更新日期:2020-10-01
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