The Effect of Clay Consistency on the Thermophysical Properties of Composite Material Clay-straw

Chihab, Yassine; Raefat, Saad; Garoum, Mohammed; Laaroussi, Najma; Bouferra, Rachid

doi:10.1109/irsec.2018.8702890

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…We notice that we have nonhomogeneous boundary conditions and they are time functions (g(t)) so the resolution of system (1) cannot be done directly using the method of separation of variables. In the literature many authors have solved this system by the method of the Laplace transform [2], [4], [7], [10]. The thermogram of the temperature on the back face is then recovered by inverting theoretically or numerically the obtained solution in the Laplace space.…”

Section: A Mathematical Modelmentioning

confidence: 99%

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Thermophysical Characterization of Earthen Materials Using the Flash Method

Chihab¹,

Garoum²,

Laaroussi³

2019

IJITEE

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Abstract, This work deals with the analytical solution of the rise temperature history on the back face of the unfired clay bricks related to the theoretical model of flash method, was calculated using Duhamel theorem. The local sensitivity analysis of the obtained solution shown that the sensitivity coefficients related to the thermal diffusivity and the adiabatic limit temperature meets the beck criterion for low time range, so these tow parameters can be simultaneously estimated with a good accuracy in this time range. Due to the slow convergence of the analytical solution in short times, the procedure for estimating the thermophysical properties is relatively slow. The theoretical analytical solution has therefore been replaced by an equivalent solution whose convergence speed was improved using the Wynn Epsilon method. The apparent thermal diffusivity and the adiabatic limit temperature of samples were then estimated by fitting measured rise temperature with the equivalent analytical solution. It is interesting to note the good agreement between the theoretical model with predicted values of parameters and the experimental data.

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Section: A Mathematical Modelmentioning

confidence: 99%

“…Stefania Liuzzi et al [5]- [6] examined the improvement of the thermal properties of earthen brick mixed with olive fibers. Chihab et al [7] studied the effect of clay consistency on the thermal properties of the composite material clay_straw.…”

Section: Introductionmentioning

confidence: 99%

Thermophysical Characterization of Earthen Materials Using the Flash Method

Chihab¹,

Garoum²,

Laaroussi³

2019

IJITEE

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“…[1]- [2]- [3]- [4]. The works [21]- [22]- [17] have focused on the evaluation of thermal properties and have highlighted the thermal performance of composite materials based on earth and fibers but their dynamic thermal characteristics have not studied.…”

Section: Introductionmentioning

confidence: 99%

Energy Performance of Earthen Walls In A Hot Climate of Morocco

Chihab*¹,

Garoum²,

Laaroussi³

2019

IJITEE

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The building sector consumes more than 25% of energy consumption in Morocco. So, the reducing of the energy cost of building has become a necessity. In this context, the objectives of this work are to investigate the thermophysical properties and the energy performance of earthen walls made from three types of unfired clay bricks. This work is broken into two steps. In the first step the apparent thermal conductivity was obtained experimentally using the hot plate method. In the second step, the thermophysical properties obtained were used to calculate the decrement factor and the time lag of complete walls mad from these materials by solving the transient heat conduction equation with periodic loadings using the eigenfunction expansion and the integrating factor methods. The effect of the outer and inner combined convection and radiation heat transfer coefficient on these dynamic thermal characteristics was studied. The optimum thickness of the walls was also calculated. Finally, the effect of thermal insulation on energy performance of the walls was studied

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