Building incorporated bio-based materials: Experimental and numerical study

Mnasri, Faiza; Bahria, Sofiane; Slimani, Mohamed El-Amine; Ouhsaine, Lahoucine; Ganaoui, Mohammed El

doi:10.1016/j.jobe.2019.101088

Cited by 26 publications

(13 citation statements)

References 28 publications

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“…In the present work, an isolated mono-zone building is studied with the above developed model. The building is an eco-cottage (Figure 3) situated at Longwy city (Lorraine University, North East of France, 300 m above the sea level, 49.52° N and 5.769° E), constructed by Laboratory of Studies and Research on Wood Materials using high thermo-physical performance materials [23,24]. The methodology described above leads to one state-space equation in a dimensionless formulation as described by Equation (11).…”

Section: Mono-zone Building Case Studymentioning

confidence: 99%

A Substitutive Coefficients Network for the Modelling of Thermal Systems: A Mono-Zone Building Case Study

et al. 2021

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A modelling approach based on the Substitutive Coefficients Network (SCN) is developed to predict the thermal behavior of a system in the dynamic state-space, without requiring knowledge of the thermal mass. The method can apply either to large- (building, combined solar systems, geothermal energy, and thermodynamic installations) or to small-scale systems (heat exchangers, electronic devices cooling systems, and Li-ion batteries). This current method is based on a dimensionless formulation of the simplified dynamic thermal balance model, using relaxation time as a key parameter to establish the model. The introduction of relaxation time reduces the parameters set as guidance coefficients. The parameters are finally expressed by a combination of global heat transfer coefficients related to each layer and/or sub-layer of the system. Advantages of the method are reliability, “non-destructibility”, i.e., it allows a reliable prediction of the thermal behavior which experimentally is inaccessible, and reducibility of the parameters size estimate. Additionally, the method is inexpensive in terms of computation memory. It is also easy to implement in practical numerical schemes. In this paper, the method leads to a simplified mathematical model that predicts the thermal behavior of a mono-zone eco-cottage building installed at Lorraine University (in Longwy, France) as a case study. Thermal performance of the building is estimated under the hourly weather conditions onsite, as obtained from the Meteonorm software. The thermal dynamics within hourly Typical Meteorological Year 2 (TMY2) Meteonorm data disturbances and the internal heating input state in the winter period were simulated with a simplified numerical discretization method. Results provide a general dynamic state of the different sub-components of the system, with limited design of the model parameters.

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Section: Mono-zone Building Case Studymentioning

confidence: 99%

A Substitutive Coefficients Network for the Modelling of Thermal Systems: A Mono-Zone Building Case Study

et al. 2021

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“…Moreover, they are usually excellent moisture regulators as shown in Abbas et al (2020), Dhakal et al (2017), Douzane et al (2016), and Fu et al (2021). In their experimental and modeling study, Mnasri et al (2020) proved the ability of bio-based materials (and more particularly a wood-cement composite) to improve hygrothermal comfort and buildings energy consumption. The capacity to regulate moisture is the property that will be particularly investigated in this study.…”

Section: Introductionmentioning

confidence: 99%

Hygrothermal transfers through a bio-based multilayered wall: Modeling study of different wall configurations subjected to various climates and indoor cyclic loads

Reuge

Collet

Prétot

et al. 2023

Journal of Building Physics

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The hygrothermal behavior of a bio-based multilayered wall has been studied by numerical simulations. The key point of these research investigations was to properly describe the hygrothermal transfers occurring inside the studied wall solution. In previous work, the case of the wall subjected to a given real climate (Wroughton HIVE demonstrator, UK, Feb 2018) has been investigated. The present work, focused on the moisture regulation capacity of the wall, considers an improved kinetics model of sorption, different layer configurations, one additional climate (Bordeaux, FR, Apr 2008) and the effect of indoor cyclic loads. Compared to the classical approach, the local kinetics approach results in prediction of stronger and steeper hygric dynamics with larger relative humidity variations at small time scales. The study of the different wall configurations allows to determine the best one in terms of moisture damping: the vapor control membrane is advantageously removed provided the OSB3 12 mm layer is replaced by an OSB4 18 mm layer. Moreover, the simulations show that the Moisture Buffer Value characteristic of each material layer is not a sufficient criterion to evaluate hygric performance of the wall; strong hygric interactions occur with the layer’s permeability independently of its sorption capacity. Finally, water content hysteresis phenomena are studied and it appears that under usual operating conditions, they can be ignored by adjusting the layers’ permeabilities for adequate fits on the Moisture Buffer Value tests.

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“…The increasing awareness about the environmental footprint of human activity has motivated the search for innovative construction materials, since the emissions linked to the construction and the operation of buildings represent 38% of the global CO2equivalent emissions (International Energy Agency & UN Environment Programme, 2020). Bio-based materials, which are defined as non-alimentary products, totally or partially derived from biodiversity, represent a very promising alternative to traditional materials for two reasons: on the one hand, they have a lower embodied energy (Cornaro et al, 2020;D'Alessandro et al, 2017;Lupíšek et al, 2015) due to their natural origin and, on the other, they present a good hygrothermal (Cérézo, 2005;Chamoin, 2013) behavior including a low thermal conductivity, which helps to reduce thermal losses and, therefore, energy consumption (Ahmad et al, 2020;Mnasri et al, 2020). In a context in which the noise of transport, of building equipment and of the city are part of everyday life, the acoustic insulation of houses and buildings is another essential feature of construction materials.…”

Section: Introductionmentioning

confidence: 99%

Link between Acoustic and Hygrothermal Behavior of Hemp Shiv and Pith Composites

Abbas

Fabbri

Ferroukhi

et al. 2022

Construction Technologies and Architecture

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Bio-based materials are an environmentally friendly alternative to classic construction materials, yet their generally low density can lead to poor acoustic properties. The acoustic performance of hemp shiv and sunflower pith composites is therefore analyzed using Kundt’s tube. Although the loose aggregates present an exceptional sound absorbing behavior, it can be notably worsened in the presence of certain binders. The Transmission Loss is nevertheless enhanced by the binders, although it does not exceed 20 dB in most cases. For both properties, the type of binder has been found to be the most influential parameter. Through the Kundt’s tube method, it is also possible to determine the geometrical parameters of the composites’ microstructure, which have been observed to be similar for materials presenting comparable hygrothermal properties and containing the same binder. In a previous work, an experimental correlation was found between the thermal conductivity and the interparticle porosity of the aforementioned composites, which is compared to theoretical thermal conductivity models from literature without finding any apparent correspondence.

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Building incorporated bio-based materials: Experimental and numerical study

Cited by 26 publications

References 28 publications

A Substitutive Coefficients Network for the Modelling of Thermal Systems: A Mono-Zone Building Case Study

A Substitutive Coefficients Network for the Modelling of Thermal Systems: A Mono-Zone Building Case Study

Hygrothermal transfers through a bio-based multilayered wall: Modeling study of different wall configurations subjected to various climates and indoor cyclic loads

Link between Acoustic and Hygrothermal Behavior of Hemp Shiv and Pith Composites

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