The influence of environmental thermal radiation on the results of thermographic investigation of buildings
Henryk Nowak
Division of Building Physics and Computational Design Methods; Faculty of Civil Engineering; Wroclaw University of Technology (Poland)
Abstract
Thermal diagnostics of building objects, mainly of residential buildings is currently realized with the standard method of thermographic examinations which enables the search the state of the thermal insulation of building envelope, the location of thermal bridges, defects in installations of different types, places of the moisture of barriers and the excessive infiltration of air. However, the operator of the IR-camera must have the solid knowledge in the range of thermograms interpretation. Thermal radiation of the outside environment is one of many factors affecting the results of thermal imaging measurements. The article presents a general description of the thermal radiation influence of the outside environment on buildings, the importance of radiative cooling of building envelope and the influence of this radiation on thermal imaging inspections of buildings and on interpretation of thermograms.
Keywords:
buildings, thermographic investigation, thermal radiation of environment, interpretation of thermogramsReferences
Vollmer M., Mollmann K., P., Infrared Thermal Imaging. Fundamentals, research and Applications. Ailey-VCH Verlag, GmbH & KGaA, Germany 2010.
DOI: https://doi.org/10.1002/9783527630868
Google Scholar
Nowak H., Oddziaływanie cieplnego promieniowania środowiska zewnętrznego na budynek. Prace Naukowe Instytutu Budownictwa PWr. Nr 72, Seria Monografie Nr 31, Wrocław, 1999.
Google Scholar
Nowak H., Modelling of the longwave radiation incident upon a building. Archives of Civil Engineering. 2001 Vol. 47, Issue 2, 243–267.
Google Scholar
Goldstein R.J., Appliaction of aerial infrared thermography to measurement of building heat loss. ASHRAE Transactions, Vol. 84, Part 1, 1978.
Google Scholar
Granqvist C.G., Spectrally selective surfaces for heating and cooling applications. SPIE Optical Engineering Press, Vol. TT1, Washington 1989.
DOI: https://doi.org/10.1117/3.2512522
Google Scholar
Nowak H.: Zastosowanie badań termowizyjnych w budownictwie. Oficyna Wydawnicza Politechniki Wrocławskiej, Wrocław 2012.
Google Scholar
Nowak H., The longwave - radiative heat transfer of the building envelopes. Infrared Physics, Vol. 32, 1991, 357–363.
DOI: https://doi.org/10.1016/0020-0891(91)90124-X
Google Scholar
Nowak H., The sky temperature in net radiant heat loss calculations from low-sloped roofs. Infrared Physics, Vol. 29, No. 2–4, 1989, 231–232.
DOI: https://doi.org/10.1016/0020-0891(89)90055-9
Google Scholar
Berdahl P., Fromberg R., The thermal radiance of clear skies. Solar Energy, Vol. 29, 1982, 299–314.
DOI: https://doi.org/10.1016/0038-092X(82)90245-6
Google Scholar
Authors
Henryk NowakDivision of Building Physics and Computational Design Methods; Faculty of Civil Engineering; Wroclaw University of Technology Poland
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