@article {1874, title = { Building incorporated bio-based materials: Experimental and numerical study }, journal = { JOURNAL OF BUILDING ENGINEERING }, volume = {28}, year = {2020}, abstract = {

In building environments, several research on dynamic moisture storage in hygroscopic building materials has improved interest in moisture buffering capacity of bio-based materials and demonstrated the potential of these materials to improve thermal comfort and buildings energy consumption. This paper presents an investigation, which aims to compare the hygroscopic behavior of different bio-based materials to identify their hygric proprieties. For this, an experimental facility is used to measure the moisture buffer value (MBV) for different categories of building materials. Thereafter, a dynamic simulation has been carried out by using TRNSYS software in order to evaluate heating and cooling loads. The results showed that the wood-cement composite still has excellent moisture regulator when compared to wood panels or fibrous materials. It has a buffer capacity superior to 3 [g/m(2).\% RH] very close to that of wood fiber panels. The simulation results of the different cases showed that the insulation reduces significantly total energy demand, but it does not lead heat evacuation in the summer season. Thus, from this study, it can be concluded that a natural ventilation mechanism is recommended to improve energy efficiency in the building.

}, author = {F. MNASRI and S. BAHRIA and M.E.A. SLIMANI and O. LAHOUCINE and M. EL-GANAOUI} } @article {1834, title = { Morphological Approach for Nonlinear Flow and Heat Transfer in Complex Bio-Composite Material }, journal = { HEAT TRANSFER ENGINEERING }, volume = {40}, year = {2019}, pages = {1486-1497}, abstract = {

The bio-based materials have experienced in recent years a relevant evolution in construction and for many building applications. Despite the efforts to develop new solutions to achieve the objectives of numerical characterizations a few researches in this area have been carried out using a heterogeneous wood-cement composite. This study is based on a constructive approach using the finite volume method in order to generate a numerical model capable of reproducing;the equivalent transfer properties of a wood-cement composite. The challenge is to understand, design, and control this multiphase inhornogeneous structure and predict transfers and flows within the community in order to achieve an optimal functionality. Experimental measurements and microscopic characterization using X-ray microtomography were performed to compare and demonstrate the method validation. The comparative results demonstrate a less than 100\% deviation between the measurements and the simulations of the equivalent thermal properties. Thus, thermal conductivity and permeability, under different medium configurations, were characterized. Therefore, it was observed that these properties depend strongly on the porosity and the pore distribution in the continuous phase. Moreover, these two parameters are highly dependent on cement percentages in the structure.

}, author = {R.C. DEPTULSKI and F. MNASRI and M. EL-GANAOUI and R. BENNACER} } @article {1699, title = { NUMERICAL ANALYSIS OF HEAT, AIR, AND MOISTURE TRANSFERS IN A WOODEN BUILDING MATERIAL }, journal = { THERMAL SCIENCE }, volume = {21}, year = {2017}, pages = {785-795}, abstract = {

The present paper aims to predict the hygrothermal behavior of massive wood panel considered as bio-based building material. In this context, we developed a macroscopic model coupled no linear heat, air, and moisture transfers that incorporates simultaneously the effect of thermal diffusion and infiltration phenomenon on the building material. The model inputs parameters were evaluated experimentally according to the recognized standards of material\&$\#$39;s characterization. Therefore, numerous series of hygrothermal calculation were carried out on the 1-D and 2-D configuration in order to assess the dimensionless effect on such wooden material. Two types of boundary conditions were considered and examined. The first are at the material scale of wood drying process. The second type of conditions is at the wall scale, where the conditions of the building ambiance are considered. Moreover, the model sensitivity to the driving potentials coupling and to the parameters variability was considered and examined. It has been found that the coupling in the model had a remarkable impact on both kinetics of temperature and moisture content.

}, url = {https://hal.archives-ouvertes.fr/hal-01684849}, author = {F. MNASRI and K. ABAHRI and M. EL-GANAOUI and R. BENNACER and S. GABSI} }