The impact of tree species and planting location on outdoor thermal comfort of a semi-outdoor space

Yang, Jiahao; Zhao, Yunfeng; Guo, Tongye; Luo, Xingfang; Ji, Kefu; Zhou, Mingfei; Wan, Frederic Y. M.

doi:10.1007/s00484-023-02532-1

Cited by 15 publications

(2 citation statements)

References 56 publications

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“…However, as the crown width of the trees increased, V a did not continue to decrease but instead showed a slight upward trend. In the hot-humid areas of China, the bottom of buildings often serves as an overhead space that provides passive ventilation [52]. Additionally, when the crown width of the trees is small, the height of their branches is lower and closer to the ground.…”

Section: Variation In V Amentioning

confidence: 99%

Comprehensive analysis on the thermal comfort of various greening forms: a study in hot-humid areas

Lin,

Wu,

et al. 2024

Environ. Res. Commun.

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The potential impact of greening on improving thermal environments is widely recognized. However, few studies have comprehensively evaluated the influence of different forms of greening, such as various tree crown widths, green facades, green roofs, and their combinations, on both outdoor and indoor environments. In this study, we conducted an extensive investigation within a residential precinct at Guangzhou University by combining on-site measurements and numerical simulations with the ENVI-met model. Physiologically Equivalent Temperature (PET) and Temperature Humidity Index (THI) were used to assess outdoor thermal comfort. The results indicated that planting trees had a greater impact on improving the outdoor thermal environment than green facades and green roofs, and this effect increased with the crown width of the trees, with a maximum potential reduction of 4.8 °C (0.2 °C) in PET (THI). Green facades can bring a change of up to 101.9 W/m2 in sensible heat flux, resulting in a reduction of up to 1.8 °C in indoor Ta (air temperature). Conversely, green roofs composed of grass exhibit minimal effects in both outdoor and indoor environments. Finally, we provide recommendations for the construction and renovation of projects in residential areas, with a focus on hot-humid areas.

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Section: Variation In V Amentioning

confidence: 99%

Comprehensive analysis on the thermal comfort of various greening forms: a study in hot-humid areas

Lin,

Wu,

et al. 2024

Environ. Res. Commun.

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“…Previous studies have shown that low airflow velocity and high radiation load conditions may have a significant impact on the accuracy of some measurement instruments' results [44,45]; therefore, in this study, a total of 5 measurement points were distributed in the overhead space of two academic buildings, avoiding direct sunlight measurement instruments. The overhead space refers to the bottom floor of a building, which is completely open and has no walls or windows [46]. Each measurement point was set at 1.5 m above ground.…”

Section: Study Area and Field Measurementmentioning

confidence: 99%

Examining the Effects of Tree Canopy Coverage on Human Thermal Comfort and Heat Dynamics in Courtyards: A Case Study in Hot-Humid Regions

Lin,

Yang,

Huang

et al. 2023

Atmosphere

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Providing thermal comfort in the courtyards of academic buildings is important and increasing tree canopy coverage (TCC) presents a convenient and feasible method to achieve this; however, few studies have comprehensively evaluated the cooling effects of TCC, considering both outdoor thermal comfort and heat dynamics. In this study, we selected two typical academic buildings at Guangzhou University, each with courtyards having different height-to-width ratios (H/W ratios). We employed both field measurements and ENVI-met-based numerical models to simulate scenarios with varying TCCs. The results demonstrated that the cooling effects caused by arranging trees increase with the TCC values. During the hottest hours of the day, trees arranged in courtyards with high H/W ratios exhibited a superior cooling effect compared to those in courtyards with low H/W ratios, with a difference of up to 0.6 °C in the PET (physiological equivalent temperature); however, over the entire daytime, the total sensible heat reduction achieved by trees in courtyards with low H/W ratios surpassed that of courtyards with high H/W ratios, with a difference of up to 0.25 × 104 J/m2. Our findings underscore the crucial role of TCC in enhancing cooling in the courtyard of academic buildings, with important implications for university planning and design.

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How outdoor horticultural activities affect elderly adults’ thermal, physiological and psychological responses: a field study

Du,

Wang,

Zhang

et al. 2024

Int J Biometeorol

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The impact of tree species and planting location on outdoor thermal comfort of a semi-outdoor space

Cited by 15 publications

References 56 publications

Comprehensive analysis on the thermal comfort of various greening forms: a study in hot-humid areas

Comprehensive analysis on the thermal comfort of various greening forms: a study in hot-humid areas

Examining the Effects of Tree Canopy Coverage on Human Thermal Comfort and Heat Dynamics in Courtyards: A Case Study in Hot-Humid Regions

How outdoor horticultural activities affect elderly adults’ thermal, physiological and psychological responses: a field study

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