Impact of Stationary and Dynamic Conditions on the U-Value Measurements of Heavy-Multi Leaf Walls by Quantitative IRT
Infrared thermography (IRT) has become a commonly applied non-destructive testing method for assessing building envelopes. Like any diagnosis tool, IRT requires an appropriate experience and principle understanding, mainly when the method is used for quantitative analyses.The challenges of the IRT o...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/334578 |
| Acceso en línea: | https://hdl.handle.net/2117/334578 https://dx.doi.org/10.3390/en13246611 |
| Access Level: | acceso abierto |
| Palabra clave: | Thermography Infrared radiation Buildings -- Energy conservation Heat -- Transmission Thermal transmittance Heat flux meter (HFM) Quantitative infrared thermography (QIRT) Climatic chamber In situ measurements Stationary conditions Dynamic conditions Termografia Raigs infraroigs Edificis -- Estalvi d'energia Calor -- Transmissió Àrees temàtiques de la UPC::Edificació |
| Sumario: | Infrared thermography (IRT) has become a commonly applied non-destructive testing method for assessing building envelopes. Like any diagnosis tool, IRT requires an appropriate experience and principle understanding, mainly when the method is used for quantitative analyses.The challenges of the IRT often deal with the dynamic properties of building partitions.Climatic conditions have a certain variability, and the accumulated energy storage in the building components can affect their temperature as well as the calculated thermal performance. This paper aims to analyze how stationary and dynamic regimes of a quantitative IRT test could impact the measured thermal transmittance of heavy multi-leaf walls. Investigation in two European countries with different climatic conditions are reported. In this way, it is discussed which boundary conditions should be guaranteed to provide reliable information about a building envelope using quantitative IRT. In order to check the quality of the measurements, the heat flux meter (HFM) method was also implemented, following the ISO 9869. The research revealed that it could be possible touse short-lasting tests in the climatic conditions of Southern Europe, while long-term tests should beimplemented in Northern European countries where climatic conditions are less regular. |
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