Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Comparison of winter air infiltration and its influences between large-space and normal-space buildings
https://orcid.org/0000-0003-3709-4517
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).
Highlights Winter air infiltration is compared in large-space and normal-space buildings. Theoretical models and field mesurement data from literature are used for this analysis. Results indicate no noticeable difference in air change rate of winter infiltration between them. Large space has higher heating load proportion by infiltration due to smaller shape coefficient. Normal space has higher indoor CO2 concentration due to larger occupant number per indoor volume.
Comparison of winter air infiltration and its influences between large-space and normal-space buildings
https://orcid.org/0000-0003-3709-4517
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).
Highlights Winter air infiltration is compared in large-space and normal-space buildings. Theoretical models and field mesurement data from literature are used for this analysis. Results indicate no noticeable difference in air change rate of winter infiltration between them. Large space has higher heating load proportion by infiltration due to smaller shape coefficient. Normal space has higher indoor CO2 concentration due to larger occupant number per indoor volume.
Comparison of winter air infiltration and its influences between large-space and normal-space buildings
https://orcid.org/0000-0003-3709-4517
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).
Highlights Winter air infiltration is compared in large-space and normal-space buildings. Theoretical models and field mesurement data from literature are used for this analysis. Results indicate no noticeable difference in air change rate of winter infiltration between them. Large space has higher heating load proportion by infiltration due to smaller shape coefficient. Normal space has higher indoor CO2 concentration due to larger occupant number per indoor volume.
Comparison of winter air infiltration and its influences between large-space and normal-space buildings
Liu, Xiaochen (Autor:in) / Liu, Xiaohua (Autor:in) / Zhang, Tao (Autor:in) / Ooka, Ryozo (Autor:in) / Kikumoto, Hideki (Autor:in)
Building and Environment ; 184
04.08.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Winter infiltration through swinging-door entrances in multi-story buildings
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