Investigating the Effect of Dust Accumulation on the Solar Reflectivity of Coating Materials for Cool Roof Applications

Cool roofs use reflective materials or coatings to reflect a portion of the incident solar radiation. This results in a lowering the surface temperature of the cool roof compared to black roofs, and thus helps reduce the cooling energy loads during the summer season. The research reported in this pa...

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Main Authors: Hamed H. Saber, Ali E. Hajiah, Saleh A. Alshehri, Hussain J. Hussain
Format: Article
Language:English
Published: MDPI AG 2021-01-01
Series:Energies
Subjects:
Online Access:https://www.mdpi.com/1996-1073/14/2/445
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spelling doaj-4025b84cc3ad48a6907adc593a4ca68a2021-01-16T00:03:21ZengMDPI AGEnergies1996-10732021-01-011444544510.3390/en14020445Investigating the Effect of Dust Accumulation on the Solar Reflectivity of Coating Materials for Cool Roof ApplicationsHamed H. Saber0Ali E. Hajiah1Saleh A. Alshehri2Hussain J. Hussain3Prince Saud bin Thuniyan Research Center, Jubail University College, Royal Commission for Jubail & Yanbu, P.O. Box 10074, Jubail 31961, Saudi ArabiaKuwait Institute for Scientific Research, P.O. Box 24885, Safat 13109, KuwaitPrince Saud bin Thuniyan Research Center, Jubail University College, Royal Commission for Jubail & Yanbu, P.O. Box 10074, Jubail 31961, Saudi ArabiaKuwait Institute for Scientific Research, P.O. Box 24885, Safat 13109, KuwaitCool roofs use reflective materials or coatings to reflect a portion of the incident solar radiation. This results in a lowering the surface temperature of the cool roof compared to black roofs, and thus helps reduce the cooling energy loads during the summer season. The research reported in this paper was conducted to assess experimentally and numerically the performance of cool and black roofs that were subjected to the hot, humid and dusty climate of Jubail Industrial City (JIC). This paper focused on characterizing one of the important properties of reflective coating material (RCM), which is its solar reflectivity. In this study, the effect of dust/dirt accumulation on the solar reflectivity of the RCM was investigated at different exposure times to the natural weathering conditions of JIC. The test results showed that dust and dirt can significantly contribute in reducing the solar reflectivity of the RCM. As such, a number of cleaning processes were conducted on the surface of the RCM so as to increase its solar reflectivity. The effect of each cleaning process on the solar reflectivity of the RCM was investigated. Finally, this paper provides a test protocol and procedure for characterizing the dust concentration/intensity on the surfaces of the RCM and cleaning this material after different exposure times to a natural and polluted climate.https://www.mdpi.com/1996-1073/14/2/445cool roofsgreen roofsblack roofsenergy savingsreflective roofing materialscleaning operations
collection DOAJ
language English
format Article
sources DOAJ
author Hamed H. Saber
Ali E. Hajiah
Saleh A. Alshehri
Hussain J. Hussain
spellingShingle Hamed H. Saber
Ali E. Hajiah
Saleh A. Alshehri
Hussain J. Hussain
Investigating the Effect of Dust Accumulation on the Solar Reflectivity of Coating Materials for Cool Roof Applications
Energies
cool roofs
green roofs
black roofs
energy savings
reflective roofing materials
cleaning operations
author_facet Hamed H. Saber
Ali E. Hajiah
Saleh A. Alshehri
Hussain J. Hussain
author_sort Hamed H. Saber
title Investigating the Effect of Dust Accumulation on the Solar Reflectivity of Coating Materials for Cool Roof Applications
title_short Investigating the Effect of Dust Accumulation on the Solar Reflectivity of Coating Materials for Cool Roof Applications
title_full Investigating the Effect of Dust Accumulation on the Solar Reflectivity of Coating Materials for Cool Roof Applications
title_fullStr Investigating the Effect of Dust Accumulation on the Solar Reflectivity of Coating Materials for Cool Roof Applications
title_full_unstemmed Investigating the Effect of Dust Accumulation on the Solar Reflectivity of Coating Materials for Cool Roof Applications
title_sort investigating the effect of dust accumulation on the solar reflectivity of coating materials for cool roof applications
publisher MDPI AG
series Energies
issn 1996-1073
publishDate 2021-01-01
description Cool roofs use reflective materials or coatings to reflect a portion of the incident solar radiation. This results in a lowering the surface temperature of the cool roof compared to black roofs, and thus helps reduce the cooling energy loads during the summer season. The research reported in this paper was conducted to assess experimentally and numerically the performance of cool and black roofs that were subjected to the hot, humid and dusty climate of Jubail Industrial City (JIC). This paper focused on characterizing one of the important properties of reflective coating material (RCM), which is its solar reflectivity. In this study, the effect of dust/dirt accumulation on the solar reflectivity of the RCM was investigated at different exposure times to the natural weathering conditions of JIC. The test results showed that dust and dirt can significantly contribute in reducing the solar reflectivity of the RCM. As such, a number of cleaning processes were conducted on the surface of the RCM so as to increase its solar reflectivity. The effect of each cleaning process on the solar reflectivity of the RCM was investigated. Finally, this paper provides a test protocol and procedure for characterizing the dust concentration/intensity on the surfaces of the RCM and cleaning this material after different exposure times to a natural and polluted climate.
topic cool roofs
green roofs
black roofs
energy savings
reflective roofing materials
cleaning operations
url https://www.mdpi.com/1996-1073/14/2/445
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