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Hygrothermal effects and moisture kinetics in a bio-based multi-layered wall: Experimental and numerical studies.

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Title: Hygrothermal effects and moisture kinetics in a bio-based multi-layered wall: Experimental and numerical studies.
Authors: Reuge, N.1 (AUTHOR) reuge@free.fr, Collet, F.1 (AUTHOR), Pretot, S.1 (AUTHOR), Moisette, S.1 (AUTHOR), Bart, M.1 (AUTHOR), Style, O.2 (AUTHOR), Shea, A.3 (AUTHOR), Lanos, C.1 (AUTHOR)
Source: Construction & Building Materials. Apr2020, Vol. 240, pN.PAG-N.PAG. 1p.
Subjects: Hygrothermoelasticity, Walls, Analytical mechanics, Porous materials, Distribution isotherms (Chromatography), Sorption, Humidity, Moisture
Geographic Terms: United Kingdom
Abstract: • One of the first comparisons of measurements/simulations of a bio-based porous wall under a real climate. • Invalidation of the classic Künzel approach and validation of the local kinetics of sorption approach. • Behavior of a bio-based wall under a wide range of hygrothermal conditions. A bio-based multi-layered reference wall has been developed within the framework of the European ISOBIO project. One of the key points of this project was to be able to perform proper simulations of the hygrothermal transfers occurring inside such walls. Previous published investigations, also performed in the framework of this project, have demonstrated that the classic assumption of instantaneous equilibrium between local relative humidity and water content according to the sorption isotherm is not relevant for bio-based porous materials, where, in practice, a rather slow kinetics of sorption occurs. The theoretical background developed in this previous study is used here to determine the kinetic constants of the bio-based construction materials and to perform 1D hygrothermal simulations. The kinetics constants are determined thanks to a 1D cylindrical tool based on the local kinetics approach, validated against several experiments of sorption. Then, heat and hygric transfers recorded on a demonstrator building (The HIVE, Wroughton, UK) are analyzed and are simulated using two modeling tools: TMC based on the Künzel approach and TMCKIN based on the local kinetic approach. From the simulations, the local kinetics improves the small timescale RH dynamics. The comparison with measurements performed in the demonstrator confirms the relevance of the local kinetics approach. [ABSTRACT FROM AUTHOR]
Copyright of Construction & Building Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 142393315
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Hygrothermal effects and moisture kinetics in a bio-based multi-layered wall: Experimental and numerical studies.
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  Data: <searchLink fieldCode="AR" term="%22Reuge%2C+N%2E%22">Reuge, N.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> reuge@free.fr</i><br /><searchLink fieldCode="AR" term="%22Collet%2C+F%2E%22">Collet, F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pretot%2C+S%2E%22">Pretot, S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Moisette%2C+S%2E%22">Moisette, S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bart%2C+M%2E%22">Bart, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Style%2C+O%2E%22">Style, O.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shea%2C+A%2E%22">Shea, A.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lanos%2C+C%2E%22">Lanos, C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Construction+%26+Building+Materials%22">Construction & Building Materials</searchLink>. Apr2020, Vol. 240, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22United+Kingdom%22">United Kingdom</searchLink>
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  Data: • One of the first comparisons of measurements/simulations of a bio-based porous wall under a real climate. • Invalidation of the classic Künzel approach and validation of the local kinetics of sorption approach. • Behavior of a bio-based wall under a wide range of hygrothermal conditions. A bio-based multi-layered reference wall has been developed within the framework of the European ISOBIO project. One of the key points of this project was to be able to perform proper simulations of the hygrothermal transfers occurring inside such walls. Previous published investigations, also performed in the framework of this project, have demonstrated that the classic assumption of instantaneous equilibrium between local relative humidity and water content according to the sorption isotherm is not relevant for bio-based porous materials, where, in practice, a rather slow kinetics of sorption occurs. The theoretical background developed in this previous study is used here to determine the kinetic constants of the bio-based construction materials and to perform 1D hygrothermal simulations. The kinetics constants are determined thanks to a 1D cylindrical tool based on the local kinetics approach, validated against several experiments of sorption. Then, heat and hygric transfers recorded on a demonstrator building (The HIVE, Wroughton, UK) are analyzed and are simulated using two modeling tools: TMC based on the Künzel approach and TMCKIN based on the local kinetic approach. From the simulations, the local kinetics improves the small timescale RH dynamics. The comparison with measurements performed in the demonstrator confirms the relevance of the local kinetics approach. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Construction & Building Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=142393315
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.conbuildmat.2019.117928
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Hygrothermoelasticity
        Type: general
      – SubjectFull: Walls
        Type: general
      – SubjectFull: Analytical mechanics
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      – SubjectFull: Porous materials
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      – SubjectFull: Distribution isotherms (Chromatography)
        Type: general
      – SubjectFull: Sorption
        Type: general
      – SubjectFull: Humidity
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      – SubjectFull: Moisture
        Type: general
      – SubjectFull: United Kingdom
        Type: general
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      – TitleFull: Hygrothermal effects and moisture kinetics in a bio-based multi-layered wall: Experimental and numerical studies.
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              Text: Apr2020
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