Investigation of the influence of surface coatings on heat transfer in multilayer walls with air gaps
Artykuł w czasopiśmie
MNiSW
140
Lista 2024
| Status: | |
| Autorzy: | Urzędowski Arkadiusz, Sachajdak Andrzej, Krawczyk Dorota |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 369 |
| Strony: | 1 - 18 |
| Impact Factor: | 8,0 |
| Scopus® Cytowania: | 0 |
| Bazy: | Scopus |
| Efekt badań statutowych | NIE |
| Finansowanie: | The research leading to these results has received funding from the commissioned task entitled "VIA CARPATIA Universities of Technology Network named after the President of the Republic of Poland Lech Kaczyński” under the special purpose grant from the Minister of Education and Science, contract no. MEiN/2022/DPI/2575, as part of the action "In the neighborhood - inter-university research internships and study visits”. This study was carried out as a part of the work No. W/WB-IIL/2/2026 at the Bialystok University of Technology. The work was partially financed from the statutory fund of the Lublin University of Technology. |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 1 lipca 2026 |
| Abstrakty: | angielski |
| Air cavities that occur at interfaces in ETICS (External Thermal Insulation Composite System) assemblies (e.g., between concrete structural layers and thermal insulation due to adhesive mortar) can strongly affect heat transfer in walls, because radiative exchange across the gap may dominate under typical design temperatures. The present study investigates the potential of reflective–smoothing surface coatings applied to concrete to reduce surface emissivity in the far-infrared band and thereby increase the effective thermal resistance of wall air gaps. Seven commercially available coatings were applied to precast-like concrete specimens measuring 30 × 30 × 3 cm. Surface emissivity was determined using thermography under controlled laboratory conditions, while coating-induced changes in surface morphology were quantified via 3D optical scanning and areal topography parameters. The measured emissivity of uncoated concrete was found to be approximately 0.95. The most sig- nificant reductions in emissivity were observed with acrylic enamel (approximately 0.29) and aluminum spray (approximately 0.59). Several coatings produced only marginal changes in emissivity. The scanned surface meshes were incorporated into a validated computational model to quantify heat transfer across a 20 mm vertical air gap. A reduction in emissivity from 0.95 to 0.29 led to an increase in the air-gap thermal resistance from 0.189 to 0.311 m2K/W, and decrease in the overall U-value. The findings underscore the efficacy of emissivity control, which is associated with surface leveling and micro-facet geometry, in enhancing the thermal perfor- mance of multilayer wall assemblies with air gaps. |
