Abahri

Allinson

Anne-Cécile Grillet

Antonin Fabbri

Barrett

Chabriac

Collet

Coussy

Desta

Dixit

Fabbri

Fraunhofer, IBP/WUFI

Gray

Grünewald

Habert

Hall

Harris

Henry Wong

Janssen

Jean-Claude Morel

Kießl

Kondepudi

Künzel

Liuzzi

Lucile Soudani

Luikov

McGregor

Monika Woloszyn

Philip

Pierre-Antoine Chabriac

Rouquerol

Sameh

Whitaker

Crossref

Energy and Buildings

Assessment of the validity of some common assumptions in hygrothermal modeling of earth based materials

The goal of this paper is to identify the effects of in-pore transport of liquid water and water vapor as well as phase changes on the hygrothermal behavior of earthen buildings. Indeed, one of the main assets used to promote these constructions is their role in moisture buffering hence temperature and relative-humidity quality controlling. However, there is no clear consensus yet concerning the impact of these phenomena on the global energy performance of the buildings. A coupled model is therefore proposed in this paper, based on heat and mass balances inside the earthen walls, in order to clarify this question. This model considers separately the kinematics of each phase (e.g. liquid water, vapor, dry air and solid matrix), in interaction with each other. It also takes into account the impact of pore water confinement on the liquid-to-vapor phase change, in particular on the resulting latent heat released or absorbed. The model is successfully compared to experimental results on instrumented full-scale rammed earth wall subjected to temperature cycles. It eventually allows identifying the singular hygrothermal behaviour of earth material by testing the range of applicability of the simplifying assumptions which are commonly made in function of the permeability of the tested material

Soudani, L.

Fabbri, A.

Morel, Jean-Claude

Woloszyn, M

Chabriac, P. A.

Wong, H.

Grillet, A. C.

Coventry University Pure Portal

Assessment of the validity of some common assumptions in hygrothermal modelling of earth based materials

https://pure.coventry.ac.uk/ws/files/3998490/1-s2%200-S0378778816300251-main.pdf

Assessment of the validity of some common assumptions in hygrothermal modelling of earth based materials

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Coventry University Pure Portal