Effects of Albedo and Thermal Inertia on Pavement Surface Temperatures with Convective Boundary Conditions—A CFD Study

The urban heat island (UHI) effect increases the ambient temperatures in cities and alters the energy budget of building materials. Urban surfaces such as pavements and roofs absorb solar heat and re-emit it back into the atmosphere, contributing towards the UHI effect. Over the past few decades, re...

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Autores principales:	Tathagata Acharya, Brooke Riehl, Alan Fuchs
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	albedo thermal inertia CFD pavement materials Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/31b6b4605e5240d699377e07910270f2
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id	oai:doaj.org-article:31b6b4605e5240d699377e07910270f2
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spelling	oai:doaj.org-article:31b6b4605e5240d699377e07910270f22021-11-25T18:52:06ZEffects of Albedo and Thermal Inertia on Pavement Surface Temperatures with Convective Boundary Conditions—A CFD Study10.3390/pr91120782227-9717https://doaj.org/article/31b6b4605e5240d699377e07910270f22021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/2078https://doaj.org/toc/2227-9717The urban heat island (UHI) effect increases the ambient temperatures in cities and alters the energy budget of building materials. Urban surfaces such as pavements and roofs absorb solar heat and re-emit it back into the atmosphere, contributing towards the UHI effect. Over the past few decades, researchers have identified albedo and thermal inertia as two of the most significant thermal properties that influence pavement surface temperatures under a given solar load. However, published data for comparisons of albedo and thermal inertia are currently inadequate. This work focuses on asphalt and concrete as two important materials used in the construction of pavements. Computational fluid dynamics (CFD) analyses are performed on asphalt and concrete pavements with the same dimensions and under the same ambient conditions. Under given conditions, the pavement top surface temperature is evaluated with varying albedo and thermal inertia values. The results show that the asphalt surface temperatures are consistently higher than the concrete surface temperatures. Surface temperatures under solar load reduce with increasing albedo and thermal inertia values for both asphalt and concrete pavements. The CFD results show that increasing the albedo is more effective in reducing pavement surface temperatures than increasing the thermal inertia.Tathagata AcharyaBrooke RiehlAlan FuchsMDPI AGarticlealbedothermal inertiaCFDpavement materialsChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 2078, p 2078 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	albedo thermal inertia CFD pavement materials Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	albedo thermal inertia CFD pavement materials Chemical technology TP1-1185 Chemistry QD1-999 Tathagata Acharya Brooke Riehl Alan Fuchs Effects of Albedo and Thermal Inertia on Pavement Surface Temperatures with Convective Boundary Conditions—A CFD Study
description	The urban heat island (UHI) effect increases the ambient temperatures in cities and alters the energy budget of building materials. Urban surfaces such as pavements and roofs absorb solar heat and re-emit it back into the atmosphere, contributing towards the UHI effect. Over the past few decades, researchers have identified albedo and thermal inertia as two of the most significant thermal properties that influence pavement surface temperatures under a given solar load. However, published data for comparisons of albedo and thermal inertia are currently inadequate. This work focuses on asphalt and concrete as two important materials used in the construction of pavements. Computational fluid dynamics (CFD) analyses are performed on asphalt and concrete pavements with the same dimensions and under the same ambient conditions. Under given conditions, the pavement top surface temperature is evaluated with varying albedo and thermal inertia values. The results show that the asphalt surface temperatures are consistently higher than the concrete surface temperatures. Surface temperatures under solar load reduce with increasing albedo and thermal inertia values for both asphalt and concrete pavements. The CFD results show that increasing the albedo is more effective in reducing pavement surface temperatures than increasing the thermal inertia.
format	article
author	Tathagata Acharya Brooke Riehl Alan Fuchs
author_facet	Tathagata Acharya Brooke Riehl Alan Fuchs
author_sort	Tathagata Acharya
title	Effects of Albedo and Thermal Inertia on Pavement Surface Temperatures with Convective Boundary Conditions—A CFD Study
title_short	Effects of Albedo and Thermal Inertia on Pavement Surface Temperatures with Convective Boundary Conditions—A CFD Study
title_full	Effects of Albedo and Thermal Inertia on Pavement Surface Temperatures with Convective Boundary Conditions—A CFD Study
title_fullStr	Effects of Albedo and Thermal Inertia on Pavement Surface Temperatures with Convective Boundary Conditions—A CFD Study
title_full_unstemmed	Effects of Albedo and Thermal Inertia on Pavement Surface Temperatures with Convective Boundary Conditions—A CFD Study
title_sort	effects of albedo and thermal inertia on pavement surface temperatures with convective boundary conditions—a cfd study
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/31b6b4605e5240d699377e07910270f2
work_keys_str_mv	AT tathagataacharya effectsofalbedoandthermalinertiaonpavementsurfacetemperatureswithconvectiveboundaryconditionsacfdstudy AT brookeriehl effectsofalbedoandthermalinertiaonpavementsurfacetemperatureswithconvectiveboundaryconditionsacfdstudy AT alanfuchs effectsofalbedoandthermalinertiaonpavementsurfacetemperatureswithconvectiveboundaryconditionsacfdstudy
_version_	1718410577739513856

Effects of Albedo and Thermal Inertia on Pavement Surface Temperatures with Convective Boundary Conditions—A CFD Study

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