Development of a simplified cool coating thermal model for predicting street canyon air temperature

Donthu, E.V.S. Kiran Kumar; S., Shashwat; Zingre, Kishor T.; Wan, Man Pun

doi:10.1016/j.buildenv.2024.111207

Building and Environment

2024

DOI: 10.1016/j.buildenv.2024.111207

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Development of a simplified cool coating thermal model for predicting street canyon air temperature

E.V.S. Kiran Kumar Donthu,

Shashwat S.,

Kishor T. Zingre

et al.

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2024

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Cited by 2 publications

References 49 publications

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Assessment of the effectiveness of cool pavements on outdoor thermal environment in urban areas

Elmagri,

Kamel,

Ozer

2024

Building and Environment

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Assessment of the effectiveness of cool pavements on outdoor thermal environment in urban areas

Elmagri,

Kamel,

Ozer

2024

Building and Environment

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An Investigation of Globe Temperature in Street Canyons: A Scaled Model Study Implementing Cool Materials

Kumar Donthu,

Shashwat,

Zingre

et al. 2024

Buildings

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The measurement of globe temperature (GT) is essential for investigating pedestrian thermal comfort in street canyons. The globe thermometer is the most common instrument used to measure GT; however, its application in scale models has not been thoroughly investigated to date. Therefore, this study explicitly investigates globe thermometer measurements in scale models and analyzes the need for customization of the globe thermometer for more reliable measurements. Scaling down with respect to the size of the globe thermometer and the effect of solar orientation/envelope materials are investigated in this study. The initial experiments were carried out in an outdoor setting using a typical street canyon model (scale 1:100) with an east-west street orientation. The results of the experiment are presented to compare a low solar reflectance street canyon (albedo of 0.4) and a high solar reflectance canyon (albedo of 0.6) in terms of surface temperatures, heat flux, and globe temperature. It is observed that although the wall and road surface temperatures are lower for the high solar reflectance canyon compared to those for the low solar reflectance canyon, the GT (measured at pedestrian height) is higher in a high reflectance canyon during the daytime, which could be due to the combined effect of direct radiation and short-wave reflection. However, for the hours after sunset, a reverse effect is observed, i.e., the GT becomes lower (up to 0.8 °C) in the case of a high reflectance canyon compared to that for the low reflectance canyon. Furthermore, the study emphasizes the impact of solar reflectance of canyon surfaces on GT values, due to the view factors that the globe thermometer on those surfaces.

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Development of a simplified cool coating thermal model for predicting street canyon air temperature

Cited by 2 publications

References 49 publications

Assessment of the effectiveness of cool pavements on outdoor thermal environment in urban areas

Assessment of the effectiveness of cool pavements on outdoor thermal environment in urban areas

An Investigation of Globe Temperature in Street Canyons: A Scaled Model Study Implementing Cool Materials

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