A 1D Model for Predicting Heat and Moisture Transfer through a Hemp-Concrete Wall Using the Finite-Element Method
| Autor: | Salah-Eddine Ouldboukhitine, Maroua Benkhaled, Sofiane Amziane, Amer Bakkour |
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| Přispěvatelé: | Institut Pascal (IP), Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne), Université Clermont Auvergne (UCA)-Université Clermont Auvergne (UCA), Université Libanaise |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Discretization Vapor pressure 020209 energy air and mass transfer Mechanical engineering numerical implementation 02 engineering and technology Article [SPI.MAT]Engineering Sciences [physics]/Materials Thermal conductivity 0203 mechanical engineering 0202 electrical engineering electronic engineering information engineering General Materials Science Total pressure Porosity Microscopy QC120-168.85 Moisture QH201-278.5 Engineering (General). Civil engineering (General) Finite element method TK1-9971 020303 mechanical engineering & transports Descriptive and experimental mechanics finite-element method Environmental science hemp concrete Electrical engineering. Electronics. Nuclear engineering TA1-2040 [SPI.GCIV.MAT]Engineering Sciences [physics]/Civil Engineering/Matériaux composites et construction heat Porous medium [SPI.GCIV.EC]Engineering Sciences [physics]/Civil Engineering/Eco-conception |
| Zdroj: | Materials Materials, 2021, 14 (22), pp.6903. ⟨10.3390/ma14226903⟩ Volume 14 Issue 22 Materials, MDPI, 2021, 14 (22), pp.6903. ⟨10.3390/ma14226903⟩ Materials, Vol 14, Iss 6903, p 6903 (2021) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14226903⟩ |
| Popis: | International audience; Plant-based concrete is a construction material which, in addition to having a very low environmental impact, exhibits excellent hygrothermal comfort properties. It is a material which is, as yet, relatively unknown to engineers in the field. Therefore, an important step is to implement reliable mass-transfer simulation methods. This will make the material easy to model, and facilitate project design to deliver suitable climatic conditions. In recent decades, numerous studies have been carried out to develop models of the coupled transfers of heat, air and moisture in porous building envelopes. Most previous models are based on Luikov’s theory, considering mass accumulation, air and total pressure gradient. This theory considers the porous medium to be homogeneous, and therefore allows for hygrothermal transfer equations on the basis of the fundamental principles of thermodynamics. This study presents a methodology for solving the classical 1D (one-dimensional) HAM (heat, air, and moisture) hygrothermal transfer model with an implementation in MATLAB. The resolution uses a discretization of the problem according to the finite-element method. The detailed solution has been tested on a plant-based concrete. The energy and mass balances are expressed using measurable transfer quantities (temperature, water content, vapor pressure, etc.) and coefficients expressly related to the macroscopic properties of the plant-based concrete (thermal conductivity, specific heat, water vapor permeability, etc.), determined experimentally. To ensure this approach is effective, the methodology is validated on a test case. The results show that the methodology is robust in handling a rationalization of the model whose parameters are not ranked and not studied by their degree of importance |
| Databáze: | OpenAIRE |
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