Analysis of factors influencing actual absorption of solar energy by building walls

Li, He; Jia, Hongwei; Zhong, Ke; Zhai, Zhiqiang

doi:10.1016/j.energy.2020.118988

Cited by 9 publications

(1 citation statement)

References 15 publications

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“…However, the study also revealed that radiation intensity and outdoor air temperature had minimal influence on these factors. The higher heat transfer values for walls signify better heat transfer efficiency through walls [66].…”

Section: Building Simulationsmentioning

confidence: 99%

Increasing Solar Reflectivity of Building Envelope Materials to Mitigate Urban Heat Islands: State-of-the-Art Review

Ziaeemehr,

Jandaghian,

et al. 2023

Buildings

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The Urban Heat Island (UHI), a consequence of urban development, leads to elevated temperatures within cities compared to their rural counterparts. This phenomenon results from factors such as urban designs, anthropogenic heat emissions, and materials that absorb and retain solar radiation in the built environment. Materials commonly used in cities, like concrete, asphalt, and stone, capture solar energy and subsequently emit it as heat into the surroundings. Consequently, this phenomenon amplifies summertime cooling energy demands in buildings. To mitigate the UHI impacts, various mitigation strategies have emerged that include but are not limited to using higher solar reflectivity materials, known as “cool materials”, and increasing vegetation and greenery in urban areas. Cool materials have high reflectivity and emissivity, effectively reflecting solar radiation while emitting absorbed heat through radiative cooling. Increasing the solar reflectivity of building envelope materials is a promising sustainable solution to lessen the UHI effects. This state-of-the-art review summarizes the UHI causes and effects, states the mitigation strategies, describes the cool building envelope materials, explains the solar reflectivity index measurements, indicates the building and micro-climate simulations, highlights the performance evaluation of using cool building envelope materials, points out the research gaps, and proposes future research opportunities.

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Section: Building Simulationsmentioning

confidence: 99%