Numerical simulation of the impact of different vegetation species on the outdoor thermal environment

Zheng, Senlin; Zhao, Lihua; Li, Qiong

doi:10.1016/j.ufug.2016.05.008

Cited by 93 publications

(33 citation statements)

References 27 publications

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“…Other tree characteristics, such as the leaf density, are either involved in complex processes or subject to considerable natural variability. The influence of different species on the outdoor thermal environment also differs by area [16]. A database of urban trees should be created to support landscape designers, and tree species should be evaluated for cities' tree planting plans and the maintenance of an urban microclimate that does not impair humans [6,17].…”

Section: Introductionmentioning

confidence: 99%

Screening of Tree Species for Improving Outdoor Human Thermal Comfort in a Taiwanese City

Lin

Tsai

2017

Sustainability

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Tropical cities can use urban greening designs featuring trees that provide shade and cooling in hot outdoor environments. The cooling effect involves numerous tree characteristics that are not easy to control during planting design, such as the canopy size and the optical properties of leaves. Planting the appropriate tree species dominates the cooling effects and the human thermal environment. Based on environmental and plant data, including the tree species, crown diameter of trees, physiologically equivalent temperature (PET), and sky view factor (SVF) in an outdoor space, a series of hierarchical cluster analysis (HCA) procedures was implemented to identify the tree species that are appropriate for improving thermal comfort. The results indicated strong correlations between SVF, average crown diameter, and PET. SVF decreased as the average crown diameter increased. For the average crown diameter of trees in an area wider than 1.5 m, the cooling effect was especially dominated by the tree species. Therefore, 15 species were screened by HCA procedures, based on a similar cooling effect. These species had various cooling effects, and were divided into four categories. Tree species, such as Spathodea campanulata and Cinnamomum camphora, had the appropriate crown diameter and cooling effect for the most comfortable thermal environment.

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Section: Introductionmentioning

confidence: 99%

Screening of Tree Species for Improving Outdoor Human Thermal Comfort in a Taiwanese City

Lin

Tsai

2017

Sustainability

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“…The impact of trees on human thermal comfort has been quantified for a heat wave day by Lee et al [10]. The impact of different vegetation species on the outdoor thermal environment has been evaluated using a numerical simulation by S. Zheng et al [11]. In addition, the recently proposed UTCI (Universal thermal climate index) presents a more complex heat budget-based approach and has been increasingly used by bio-meteorological researchers [12,13].…”

Section: Outline Of Objective Site Measurement and Calculation Methodsmentioning

confidence: 99%

Analysis of Solar Radiation Shading Effects by Trees in the Open Space around Buildings

et al. 2017

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Work and leisure in outdoor spaces influences people's physiological and psychological, while it can also lead to a reduction of energy consumed via air conditioning and lighting. In this study, the effects of solar radiation shading by trees in the open space around buildings on microclimatic development and pedestrian radiation environment are evaluated through a case study on the redevelopment buildings in front of Central Osaka Station, based on both observation and calculation. In both open space and green garden, direct solar radiation is shielded mainly by the buildings located behind the trees rather than by the trees themselves. Solar radiation shielding by trees is necessary in the range of more than 10 m from the south side of the buildings and more than 6 m from the west or east sides of the buildings.

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“…This is mainly because trees can reduce the outdoor wind speed, making the heat accumulation phenomenon appeared and decreasing people's comfort. (ZHENG ET AL., 2016) Possibly, air pollution as well as the introduction of heat by the urban activities would contribute to raise the thermal sensation, leading to the predominance of WGBT values classified as uncomfortable (greater than 26ºC).…”

Section: )mentioning

confidence: 99%

Estimation of the wet bulb globe temperature from temperature and relative humidity gradients

Pinto

Silveira

Musis

et al. 2018

CeN

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Numerical simulation of the impact of different vegetation species on the outdoor thermal environment

Cited by 93 publications

References 27 publications

Screening of Tree Species for Improving Outdoor Human Thermal Comfort in a Taiwanese City

Screening of Tree Species for Improving Outdoor Human Thermal Comfort in a Taiwanese City

Analysis of Solar Radiation Shading Effects by Trees in the Open Space around Buildings

Estimation of the wet bulb globe temperature from temperature and relative humidity gradients

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