Sensitive analysis of harmonics on the assessment of thermal diffusivity of building materials of a periodic state
Thermal efficiency of buildings requires a perfect knowledge of the thermal properties of materials which compose building envelope. To this end, the use of reliable testing methods for thermal diffusivity measurements of buildings materials is fundamental. Currently, periodic methods are based on t...
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VINCA Institute of Nuclear Sciences
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doaj-f05912676d2a475fb83dc8ec9b289ed72021-01-02T01:55:53ZengVINCA Institute of Nuclear SciencesThermal Science0354-98362334-71632018-01-01221 Part A22323610.2298/TSCI150702144P0354-98361600144PSensitive analysis of harmonics on the assessment of thermal diffusivity of building materials of a periodic statePromis Geoffrey0Douzane Omar1Ben Hamed Haykel2Langlet Thierry3University of Picardie Jules Verne, Innovatives Technologies Laboratory (LTI), Amiens Cedex, FRANCEUniversity of Picardie Jules Verne, Innovatives Technologies Laboratory (LTI), Amiens Cedex, FRANCEUniversity of Picardie Jules Verne, Innovatives Technologies Laboratory (LTI), Amiens Cedex, FRANCEUniversity of Picardie Jules Verne, Innovatives Technologies Laboratory (LTI), Amiens Cedex, FRANCEThermal efficiency of buildings requires a perfect knowledge of the thermal properties of materials which compose building envelope. To this end, the use of reliable testing methods for thermal diffusivity measurements of buildings materials is fundamental. Currently, periodic methods are based on the exploitation of fundamental harmonic, resulting from Fourier series decomposition. The objective of this paper is to demonstrate that fundamental is necessary and sufficient in or-der to characterize the thermal diffusivity. For those purposes, a sensitive analysis of harmonic contributions from Fourier series is supported by a substantial experimental campaign. Moreover, some dissymmetrical tests were carried out in order to highlight the preponderant influence of fundamental, compared to other harmonics. The analysis of contributions of harmonics shows that the evolution of thermal diffusivity is very slightly dependent on the number of harmonics. Then, the exploitation of fundamental is necessary and sufficient, and the characterization test protocol is validated by experimental results and by the comparison with commonly accepted values for these kinds of materials.http://www.doiserbia.nb.rs/img/doi/0354-9836/2018/0354-98361600144P.pdfthermal metrologythermal diffusivityperiodic methodsensitive analysisdissymmetrical testbuilding materials |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Promis Geoffrey Douzane Omar Ben Hamed Haykel Langlet Thierry |
spellingShingle |
Promis Geoffrey Douzane Omar Ben Hamed Haykel Langlet Thierry Sensitive analysis of harmonics on the assessment of thermal diffusivity of building materials of a periodic state Thermal Science thermal metrology thermal diffusivity periodic method sensitive analysis dissymmetrical test building materials |
author_facet |
Promis Geoffrey Douzane Omar Ben Hamed Haykel Langlet Thierry |
author_sort |
Promis Geoffrey |
title |
Sensitive analysis of harmonics on the assessment of thermal diffusivity of building materials of a periodic state |
title_short |
Sensitive analysis of harmonics on the assessment of thermal diffusivity of building materials of a periodic state |
title_full |
Sensitive analysis of harmonics on the assessment of thermal diffusivity of building materials of a periodic state |
title_fullStr |
Sensitive analysis of harmonics on the assessment of thermal diffusivity of building materials of a periodic state |
title_full_unstemmed |
Sensitive analysis of harmonics on the assessment of thermal diffusivity of building materials of a periodic state |
title_sort |
sensitive analysis of harmonics on the assessment of thermal diffusivity of building materials of a periodic state |
publisher |
VINCA Institute of Nuclear Sciences |
series |
Thermal Science |
issn |
0354-9836 2334-7163 |
publishDate |
2018-01-01 |
description |
Thermal efficiency of buildings requires a perfect knowledge of the thermal properties of materials which compose building envelope. To this end, the use of reliable testing methods for thermal diffusivity measurements of buildings materials is fundamental. Currently, periodic methods are based on the exploitation of fundamental harmonic, resulting from Fourier series decomposition. The objective of this paper is to demonstrate that fundamental is necessary and sufficient in or-der to characterize the thermal diffusivity. For those purposes, a sensitive analysis of harmonic contributions from Fourier series is supported by a substantial experimental campaign. Moreover, some dissymmetrical tests were carried out in order to highlight the preponderant influence of fundamental, compared to other harmonics. The analysis of contributions of harmonics shows that the evolution of thermal diffusivity is very slightly dependent on the number of harmonics. Then, the exploitation of fundamental is necessary and sufficient, and the characterization test protocol is validated by experimental results and by the comparison with commonly accepted values for these kinds of materials. |
topic |
thermal metrology thermal diffusivity periodic method sensitive analysis dissymmetrical test building materials |
url |
http://www.doiserbia.nb.rs/img/doi/0354-9836/2018/0354-98361600144P.pdf |
work_keys_str_mv |
AT promisgeoffrey sensitiveanalysisofharmonicsontheassessmentofthermaldiffusivityofbuildingmaterialsofaperiodicstate AT douzaneomar sensitiveanalysisofharmonicsontheassessmentofthermaldiffusivityofbuildingmaterialsofaperiodicstate AT benhamedhaykel sensitiveanalysisofharmonicsontheassessmentofthermaldiffusivityofbuildingmaterialsofaperiodicstate AT langletthierry sensitiveanalysisofharmonicsontheassessmentofthermaldiffusivityofbuildingmaterialsofaperiodicstate |
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