Influence of turbulent wind on the ventilatio of an enclosure with a single opening

Narasaki, Masaya; Yamanaka, Tatsuhiko; Higuchi, Masaaki

doi:10.1016/0160-4120(89)90085-8

Cited by 7 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…13 However, most such models are developed based on a single-room building and are not accurate enough for predictive purposes even in a two-storey building. 14 Such idealized building models are also adopted in other studies, such as those based on theoretical analysis [15][16][17] and geometrical evaluation of openings. 18,19 These studies do help us to understand the air exchange mechanisms at the openings.…”

Section: Introductionmentioning

confidence: 99%

On-site measurements of ventilation performance and indoor air quality in naturally ventilated high-rise residential buildings in Hong Kong

Mak

Cui

2013

Indoor and Built Environment

View full text Add to dashboard Cite

Single-sided ventilation rate is difficult to accurately predict because it has a complex relationship with many factors, including the direction of the approaching wind and building envelope features. In addition, the incursion of outdoor pollutants into the interior through a ventilation opening has been recognized as a serious threat to indoor air quality (IAQ). This article presents on-site measurements of the ventilation performance and IAQ in four high-rise residential rooms in Hong Kong. Key parameters including the air changes per hour, respirable suspended particulate matters (PM: PM 10 and PM 2.5 ), and total volatile organic compounds were continuously recorded over a specified period. A comparison of cases with floor-extended and window-like openings is made. The results indicate that single-sided ventilation performs well regardless of the orientation of the apartment room and the configuration of the opening. Previous empirical models based on single-room buildings are not reliable in determining the ventilation rate of high-rise buildings. The measurements reported here also identify an important route for the incursion of outdoor pollutants, namely the downward re-entry of aerosol particles from an upper unit to a lower unit in the same building. A combination of gravitational and wind effects means this downward transport route significantly increases the PM 10 and PM 2.5 concentrations in the lower room.

show abstract