Study on outdoor thermal comfort of the commercial pedestrian block in hot-summer and cold-winter region of southern China-a case study of The Taizhou Old Block

Ma, Xuan; Fukuda, Hiroatsu; Zhou, Dian; Wang, Mengying

doi:10.1016/j.tourman.2019.05.005

Cited by 33 publications

(13 citation statements)

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“…On the other hand, with rapidly increasing of urban population and expanding of built-up areas, pedestrian space plays an important role in human daily lives [6], since it is a major place for outdoor activities as well as a symbol of urban planning [7]. Comfortable and pleasant streets can provide pedestrians a good experience and feeling, attract more tourists, increase income of the urban tourism industry and also reduce the risk of urban heat islands (UHI) and heat waves to human 2 of 15 health, especially outdoor workers [7,8]. Thus, the research on thermal comfort in pedestrian space has a positive impact on improving the microclimate environment and promoting sustainable urban development [9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Thermal Environment in Pedestrian Space Using 3D Thermal Imaging

Zhao

Luo²,

2020

Energies

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Pedestrian space is an important place for people’s outdoor activities. Its thermal environment affects pedestrian walking experience, route selection and physical health. This study presents a 3D thermography-based method to analyze and evaluate the spatial distribution of thermal comfort. The proposed 3D thermal image was generated using 3D city models captured by an unmanned aerial vehicle (UAV) and thermal images gathered by an infrared camera. It can visualize construction elements, but also simply output surface temperatures at selected points. This paper described the process of using 3D thermal images to analyze the built environment, and selected two pedestrian spaces as case study objects. Their thermal images and mean radiant temperatures (MRT) were obtained from field measurement data collected by a drone and infrared camera. The following findings were obtained: (a) the MRT difference in the pedestrian space between sunlit and shaded areas was more than 3 °C; (b) the MRT values at the measurement points near vegetation were lower; (c) when the ratio of street height to width (H/W) was larger, the MRT values at all measurement points varied slightly. These findings can be used for the designers to evaluate and improve the thermal environment in pedestrian space.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Thermal Environment in Pedestrian Space Using 3D Thermal Imaging

Zhao

Luo²,

2020

Energies

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“…The site of the selected site (Tai Zhou Old block) Note: The designations employed and the presentation of the material on this map do not imply the expression of any opinion whatsoever on the part of Figure 6 The different points in this study [43] Figure 7 The validation between measured and simulated SVF [43] Figure 8 The sheye image of the measured tree [43] Figure 9 The built model in ENVI-met of this study Figure 10 RMSE between measured and measured data…”

Section: Discussionmentioning

confidence: 99%

“…Correlation between measured and simulated air temperature [43] Figure 12 Correlation between measured and simulated relative humidity [43] Figure 13 Correlation between measured and simulated wind velocity [43] Figure 14 The PET of existing scenario on Jul. 28th…”

Section: Discussionmentioning

confidence: 99%

“…Based on the different geometry of the research site, this region is divided into six different points (Figure. 6 and Table . 2) [43], the measured period is carried out on July 28th and 29th, 2016. In accordance with the published weather information by the local meteorological stations, the hottest month of one year is on July, thus we choose the hottest days of this month for evaluation (Table . 3)…”

Section: On-site Measurementmentioning

confidence: 99%

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The effect of various urban design parameter in alleviating urban heat island and improving thermal health—a case study in a built pedestrianized block of China

Zhang

Guo

et al. 2021

Environ Sci Pollut Res

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BackgroundIncreasing urban heat island and global warming have aroused serious thermal environmental problems, even do harm to people's thermal health. Because the importance in people's daily life, Commercial pedestrianized block represents a symbol of a city or metropolis, therefore, focusing the attention on the thermal environment in such regions is very necessary. Most of the researches on urban thermal environment are calculated by remote sensing data, limited by the low spatial resolution of remote sensing image, it may not obviously re ect the true thermal environment of the research site, especially in some micro-scale regions. MethodsBased on this, the new software ENVI-met is developed to research the thermal environment and forecast people's thermal sensation in micro-scale region. ResultsTherefore, the objective of this study aims at conducting eld measurement and numerical simulation to assess the thermal environment of a typical commercial pedestrianized space in southern China, and assess the different urban design parameter in ameliorating urban heat island effect. ConclusionsOur nal results demonstrate a quantitative evidence for establishing a comprehensive standard for improving thermal environment in micro-scale region, and this study also can be a supplementary in the research eld about improving thermal health.

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“…Although the reflection and absorption of radiative heat of pavement can affect the air temperature, both short-wave radiation and long-wave radiation impact the pedestrians' thermal comfort. Shortwave radiation refers to the sunlight, which comes from the sun surface with extremely high temperature, long-wave radiation is emitted by the atmosphere and terrestrial surfaces including buildings and ground, the temperatures are relatively low (Ma et al, 2019). Pavements are taking up a large proportion of urban areas, which could highly contribute to the development of UHI (Santamouris, 2013).…”

Section: Introductionmentioning

confidence: 99%

A Coupled Modelling Method for the Evaluation of the Impact of Pavement Solar Collector on Urban Air Temperature and Thermal Collection

Jimenez-Bescos

Pantua

et al. 2021

Future Cities and Environment

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The Urban Heat Island (UHI) effect is a phenomenon whereby urban areas become warmer than their surrounding rural areas, due to the replacement of vegetation and soil with surfaces such as asphalt and concrete. The asphalt pavement surfaces tend to absorb a large amount of heat through solar radiation and increase the air temperature, which affects the operation of building heating and cooling systems, causing environmental problems and thermal discomfort. However, this energy can be collected by water circulated through buried copper pipes to cool down temperatures and be stored for other usages. This work aims to develop a method for determining the optimum areas to locate pavement solar collector (PSC) systems and simulate the reduction of ambient air and surface temperature by using a coupled computational modelling approach. Discrete ordinate model and solar-ray tracing were utilised for solar radiation effect modelling in the 3D simulation. Furthermore, the PSC prototype was developed, and lab-scale experiments were carried out for validation. Based on the simulated conditions, in the unshaded area, the asphalt slab's near-surface temperature was reduced by up to 10℃ and the outlet water temperature increased by about 5℃. At the pedestrian height level, the air temperature was reduced up to 4.6℃. This study further expands the investigation of the variation of outdoor conditions such as air temperature and solar radiation. The results showed that the proposed method could be used to optimise the pavement solar collector's positioning to reduce urban surface and air temperature.

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Study on outdoor thermal comfort of the commercial pedestrian block in hot-summer and cold-winter region of southern China-a case study of The Taizhou Old Block

Cited by 33 publications

References 54 publications

Analysis of the Thermal Environment in Pedestrian Space Using 3D Thermal Imaging

Analysis of the Thermal Environment in Pedestrian Space Using 3D Thermal Imaging

The effect of various urban design parameter in alleviating urban heat island and improving thermal health—a case study in a built pedestrianized block of China

A Coupled Modelling Method for the Evaluation of the Impact of Pavement Solar Collector on Urban Air Temperature and Thermal Collection

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