A parametric study of the effect of building layout on wind flow over an urban area

Li, Biao; Jiang, Cunyan; Wang, Lu; Cai, Wenju; Liu, Jing

doi:10.1016/j.buildenv.2019.106160

Cited by 22 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding canyon morphology, the parameters proven most influential on temperature and radiation exchanges are canyon orientation, aspect ratio (H/W), and sky view factors [8]. For example, according to [9], the building disposition directly impacts temperature levels: in narrow street canyons, the air temperature increase by 2-4°C.…”

Section: Overview Of Uhi and Ap Mitigation Strategiesmentioning

confidence: 99%

“…Still, within street canyons, high-level vegetation canopies (trees) have led to a deterioration in air quality, while low-level green infrastructure (hedges) improved air quality conditions. The use of shrubs or hedges with heights lower than 2 m should be encouraged to improve roadside air quality, and large, dense trees should be avoided around roads with heavy traffic [9]. The greenery position is also important; roadside trees and hedges reduce the heat perception in highly polluted areas [19].…”

Section: Strategies Targeting Uhi and Ap With The Presence Of High An...mentioning

confidence: 99%

See 1 more Smart Citation

Greenery as a mitigation strategy to urban heat and air pollution: a comparative simulation-based study in a densely built environment

Salvalai,

Blanco Cadena,

Quagliarini

2023

Rivista Tema

View full text Add to dashboard Cite

The urban heat island and the urban air pollution concentration are two major climate-change-related phenomena affecting the built environment worldwide. This paper aims to verify the potential effect of different mitigation measures through a simulation study. In detail the present study focuses on the analysis of the environmental impacts of urban vegetation, such as green facades, vertical greenery, and green pavements. After an extensive screening of the literature review, an investigation of the impact of the most common built environment design variables in a defined case study led to the definition of a typical urban canyon was tested. The results show that the presence of trees in a street canyon could reduce the air temperature peaks by 5-10 °C, while the high-level vegetation canopies can lead to a deterioration in air quality with a PM concentration increasing by 1.2-1.5%. Instead, using low-level green infrastructure improves the air quality conditions on the sidewalk, reducing the NOx in the range of 10-20%. The analyzed high-level greenery generated an air temperature reduction effect on a street level ranging from 8 to 12°C. The present work contributes to clarifying the potential mitigation effect of green infrastructure in a densely built environment, where the risk of increasing temperatures and air pollutants is foreseen to be more intense in the coming years.

show abstract

Section: Overview Of Uhi and Ap Mitigation Strategiesmentioning

confidence: 99%

Section: Strategies Targeting Uhi and Ap With The Presence Of High An...mentioning

confidence: 99%

Greenery as a mitigation strategy to urban heat and air pollution: a comparative simulation-based study in a densely built environment

Salvalai,

Blanco Cadena,

Quagliarini

2023

Rivista Tema

View full text Add to dashboard Cite

show abstract

“…In particular, Kulkarni et al 59 found suitable places for large-scale power generation in the southern regions. Biao et al 60 examined wind flows in distinct open fields and built environments to investigate wind flow at wind locations. Although wind velocity in vast fields is typically higher than in cities, turbine installation in residential areas is restricted due to agricultural land use.…”

Section: Issues Impacting Small-scale Turbine Performance In Urban Areasmentioning

confidence: 99%

Recent developments and issues of small-scale wind turbines in urban residential buildings- A review

Aravindhan¹,

Natarajan

Ponnuvel

et al. 2022

Energy & Environment

View full text Add to dashboard Cite

To address the future growth in energy demands, complete renewable power generation from environmental assets demands unique methodologies from every investigator. Wind energy harvesting in residential areas is one such approach. But the urban landscape and the physical challenges restrict the erection of small-scale wind turbines. Further, a significant degree of uncertainty leads to a lack of awareness of how dispersion in urban environments impacts turbine performance. This research looks into the potential productivity of wind turbine installations in urban areas, considering turbulence. These unique ambient conditions prevailing in a dynamic environment compared to flat terrains have made the harnessing of wind energy very difficult. Many researchers are still trying to find an effective methodology in these constrained circumstances. Since the characteristics of small-scale wind turbine models are undetermined, large-scale turbines fared well compared to small-scale wind turbine models. The feasibility and success of small and medium turbines in community homes were investigated in this study. The origins of the very uncertain nature of atmospheric boundary layer limitations are discussed in this work and subsequent successful developments by different researchers.

show abstract

“…The purpose of digging the street wind path is to improve the city air quality which further improves livability [19]. Computational fluid dynamics (CFD) can simulate the wind field of the street and find the ventilation characteristics of the street shape, Geographic Information System (GIS) can calculate the shape index related to the ventilation potential, thereby quantifying the entire urban area [20,21]. These index parameters can assist the planners to draw the local urban climate map, such as average building height, the standard deviation of building height, building density, building volume ratio, building aspect ratio, building surface area density and street aspect ratio, population density, pollutant concentration, land cover type, heat island distribution, and other data indicators have also been added to the identification of ventilation path [22].…”

Section: Introductionmentioning

confidence: 99%

The Ventilation Path Assessment of Urban Street in Wuhan

Yin¹,

Zhan²,

Tayyab³

2021

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

The urban ventilation path can help to alleviate the heat island effect and air pollution. The building ventilation method is based on building front area density, the building data is divided into grids with numerical attributes, to detect ventilation path. The urban morphology is including building and street, while this building method ignores the ventilation path of the urban street. The streets are most closely connected with people's lives. The direction of the street is the main evaluation index to extract the street ventilation path, which is the supplement of the building method. The spatial analysis technology of Geographic Information System (GIS) was used to calculate the front area density, the street direction, the street length, and the street aspect ratio. These indicators are related to ventilation potential and simulated by Computational Fluid dynamics (CFD). Under different wind directions including the vertical and parallel to the street, it found that the street ventilation potential is different as to the street aspect ratio, if the wind direction is parallel to the street, the street ventilation is better with the decrease of street aspect ratio; if the wind direction is perpendicular to the street, the street ventilation is better with the increase of the street aspect ratio. In the grids of high front area density, there are also some potential ventilation urban streets.

show abstract

A parametric study of the effect of building layout on wind flow over an urban area

Cited by 22 publications

References 25 publications

Greenery as a mitigation strategy to urban heat and air pollution: a comparative simulation-based study in a densely built environment

Greenery as a mitigation strategy to urban heat and air pollution: a comparative simulation-based study in a densely built environment

Recent developments and issues of small-scale wind turbines in urban residential buildings- A review

The Ventilation Path Assessment of Urban Street in Wuhan

Contact Info

Product

Resources

About