Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Laboratorial investigation on optical and thermal properties of cool pavement nano-coatings for urban heat island mitigation
https://orcid.org/0000-0001-7115-1373
https://orcid.org/0000-0002-1173-5876
Abstract Urban Heat Island (UHI) effect causes the increasing energy consumption for building and environment cooling. Reflective coating is an effective cool pavement technology to counterbalance UHI. However, the investigation of the optical properties and their relation of colored reflective pavement coatings at full solar spectrum are still in its infancy. This paper prepared ten non-white coating samples to evaluate the optical properties and thermal performance of pigments and coatings. It was founded that color lightness is a dominant factor of visible reflectance however it does not affect the near-infrared reflectance. The coatings doped in chrome achieved reflectance around 60% and the near-infrared reflectance was as high as the white coating around 95%. The relation between lightness and visible reflectance was linear for coatings in dark and medium color while the exponential growth was shown for the coatings in light color. Based on the statistical analysis, the visible and short wave near-infrared reflectance (400 nm–1100 nm) were the dominant factors to influence thermal performance of coatings. The investigated results could provide insights and references for optimizing the design of reflective cool pavement coating and developing the metameric matching colored coatings without glare and aesthetic problems to mitigate the urban heat island effect.
Highlights Optical properties at full solar spectrum of cool pavement coatings are investigated. Reflective pavements with nano-materials doped with chrome achieve high reflectance. Impact of reflectance in different spectrum on thermal performance was studied. The relation between lightness and visible reflectance is investigated.
Laboratorial investigation on optical and thermal properties of cool pavement nano-coatings for urban heat island mitigation
https://orcid.org/0000-0001-7115-1373
https://orcid.org/0000-0002-1173-5876
Abstract Urban Heat Island (UHI) effect causes the increasing energy consumption for building and environment cooling. Reflective coating is an effective cool pavement technology to counterbalance UHI. However, the investigation of the optical properties and their relation of colored reflective pavement coatings at full solar spectrum are still in its infancy. This paper prepared ten non-white coating samples to evaluate the optical properties and thermal performance of pigments and coatings. It was founded that color lightness is a dominant factor of visible reflectance however it does not affect the near-infrared reflectance. The coatings doped in chrome achieved reflectance around 60% and the near-infrared reflectance was as high as the white coating around 95%. The relation between lightness and visible reflectance was linear for coatings in dark and medium color while the exponential growth was shown for the coatings in light color. Based on the statistical analysis, the visible and short wave near-infrared reflectance (400 nm–1100 nm) were the dominant factors to influence thermal performance of coatings. The investigated results could provide insights and references for optimizing the design of reflective cool pavement coating and developing the metameric matching colored coatings without glare and aesthetic problems to mitigate the urban heat island effect.
Highlights Optical properties at full solar spectrum of cool pavement coatings are investigated. Reflective pavements with nano-materials doped with chrome achieve high reflectance. Impact of reflectance in different spectrum on thermal performance was studied. The relation between lightness and visible reflectance is investigated.
Laboratorial investigation on optical and thermal properties of cool pavement nano-coatings for urban heat island mitigation
https://orcid.org/0000-0001-7115-1373
https://orcid.org/0000-0002-1173-5876
Abstract Urban Heat Island (UHI) effect causes the increasing energy consumption for building and environment cooling. Reflective coating is an effective cool pavement technology to counterbalance UHI. However, the investigation of the optical properties and their relation of colored reflective pavement coatings at full solar spectrum are still in its infancy. This paper prepared ten non-white coating samples to evaluate the optical properties and thermal performance of pigments and coatings. It was founded that color lightness is a dominant factor of visible reflectance however it does not affect the near-infrared reflectance. The coatings doped in chrome achieved reflectance around 60% and the near-infrared reflectance was as high as the white coating around 95%. The relation between lightness and visible reflectance was linear for coatings in dark and medium color while the exponential growth was shown for the coatings in light color. Based on the statistical analysis, the visible and short wave near-infrared reflectance (400 nm–1100 nm) were the dominant factors to influence thermal performance of coatings. The investigated results could provide insights and references for optimizing the design of reflective cool pavement coating and developing the metameric matching colored coatings without glare and aesthetic problems to mitigate the urban heat island effect.
Highlights Optical properties at full solar spectrum of cool pavement coatings are investigated. Reflective pavements with nano-materials doped with chrome achieve high reflectance. Impact of reflectance in different spectrum on thermal performance was studied. The relation between lightness and visible reflectance is investigated.
Laboratorial investigation on optical and thermal properties of cool pavement nano-coatings for urban heat island mitigation
Xie, Ning (Autor:in) / Li, Hui (Autor:in) / Abdelhady, Ahmed (Autor:in) / Harvey, John (Autor:in)
Building and Environment ; 147 ; 231-240
08.10.2018
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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