Coatings with high solar reflectivity: heat build-up in laboratory and real conditions / Ewa Langer in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 5 (09/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 5 (09/2024) . - p. 1783-1793 Titre : Coatings with high solar reflectivity: heat build-up in laboratory and real conditions Type de document : texte imprimé Auteurs : Ewa Langer, Auteur ; MaÅ‚gorzata Zubielewicz, Auteur ; Bartosz Kopycinski, Auteur Année de publication : 2024 Article en page(s) : p. 1783-1793 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Essais (technologie) Formulation (Génie chimique) Pigments à effets spéciaux Réflectance Réflectance solaire totale Réflectivité thermique Revêtements organiques Toiture -- Revêtements:Toiture -- Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Excessive heat build-up of painted surfaces due to solar radiation and the resulting increase in interior temperatures is undesirable and even dangerous for roofing, facades, and other structural elements. One way to reduce surface temperature is to apply suitably pigmented organic coatings exhibiting high solar reflectance properties. The use of high solar reflectance pigments in paints resulted in coatings with high total solar reflectance (TSR) values, and thus with the ability to reduce the temperature of the painted substrate. The coatings were tested under laboratory and outdoor conditions on two livestock farms. It was found that the developed coatings exhibit significantly higher TSR values than commercial coatings of the same colors designed for painting roofs. The TSR values do not change when the coatings are exposed to the weather. Note de contenu : - MATERIALS AND METHODS : - Paint formulations - Test samples - Test methods - RESULTS AND DISCUSSION : - Thermal behavior in laboratory and field conditions - Effect of weathering on thermal behavior DOI : https://doi.org/10.1007/s11998-024-00935-2 En ligne : https://drive.google.com/file/d/1fBfDts7FS2FUkQogEb-u3h52PegBUgNg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41527 [article]

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Measurement of total solar reflectance for 'cool coatings' / Céline de Lame in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4627 (12/2016)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4627 (12/2016) . - p. 22-23 Titre : Measurement of total solar reflectance for 'cool coatings' Type de document : texte imprimé Auteurs : Céline de Lame, Auteur ; Simon Kervyn, Auteur ; Julien Vander Steen, Auteur Année de publication : 2016 Article en page(s) : p. 22-23 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane Pigments à effets spéciaux Rayonnement infrarouge Réflectance Réflectance solaire totale Réflectivité thermique -- Mesure Revêtements en bâtiment:Peinture en bâtiment Index. décimale : 667.9 Revêtements et enduits Résumé : This paper presents the reseach findings on cool pigments for exterior coatings. Overheat in buildings can be avoided by selecting an appropriate façade coating, which will reflect the sun's radiation. This is necessary in order to decrease the energy consumption of buildings. For a few years now a new generation of 'cool coatings' exist, with the particularity that they reflect the sunlight in the near infrared range (NIR) of the solar spectrum. Therefore, providing coatings with identical colours but that will lead to different surface temperature because of the increased reflectance in the NIR. The solar irradiance spectrum extends from 280 to 2500nm and is composed of three sections. Ultraviolet : 280 to 400nm (5% of the solar energy emitted), visible : 400 to 700nm (43%) and near-infrared : 700 to 2500nm (52%). High reflectance in UV will improve the durability of the coatings by reducing photochemical degradation process (chalking process for example). The major part of the solar energy is sent in the near-infrared part of the spectrum, making ot the key parameter for making 'cool coatings'. With this new kind of coatings it is necessary to compare and quantify their ability to reflect sunlight by calculating the TSR (Total Solar Reflectance). The TSR is the percentage of solar light reflected by a surface and is calculated according to the ASTM E903 standard. Note de contenu : - Validation of the method : reflectance of a green pigment, powder and dispersed form - Measurement of TSR of pigment in powder form, influence of the TiO2 surface treatment - Influence of the NIR part of the spectra : green pigments + black pigments - Method limitation : PCC reflectance of powder + film En ligne : https://drive.google.com/file/d/16dSXuloc00adYO6UKjWRJcE-Dzo653Cr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27316 [article]

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