Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography

•Research was undertaken in an experimental room and real built environments.•Measured U-values were significantly related to outer air temperatures.•The optimum temperature difference ranges between 7 and 16 °C.•Heavy multi-leaf walls had more reliable measured U-values at low ΔT (

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Bibliographische Detailangaben
Veröffentlicht in:	Energy and buildings 2018-07, Vol.171, p.64-75
Hauptverfasser:	Tejedor, Blanca, Casals, Miquel, Gangolells, Marta
Format:	Artikel
Sprache:	eng
Schlagworte:	Air temperature Aïllament tèrmic Building facades Building façade Buildings Edificació Edificis Energy conservation Estalvi d'energia Facades Façanes Heat capacity per unit of area Heavy multi-leaf walls Heavy single-leaf walls Housing Impact analysis in-situ measurement Infrared imaging Insulation (Heat) Kappa value Leaves Measured U-value Measured U-value, in-situ measurement Operating conditions Properties (attributes) Quantitative internal infrared thermography (IRT) Real built environment Refurbishment Renovation & restoration Residential areas Residential buildings Statistical analysis Temperature gradients Termografia Thermography Thermophysical properties Transmittance Àrees temàtiques de la UPC
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Beschreibung
Zusammenfassung:	•Research was undertaken in an experimental room and real built environments.•Measured U-values were significantly related to outer air temperatures.•The optimum temperature difference ranges between 7 and 16 °C.•Heavy multi-leaf walls had more reliable measured U-values at low ΔT (
ISSN:	0378-7788 1872-6178
DOI:	10.1016/j.enbuild.2018.04.011