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The objective of this work is to analyze the energetic efficiency of an individual building including an area of 130 m² multi-zone, located in the region of FEZ which is characterized by a very hot and dry climate in summer and a quite cold one in winter, by incorporating insulating materials. This study was performed using TRNSYS V16 simulation so...
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Citations
... In recent years, several research projects have focused on this theme and, more particularly, on the different passive or semi-passive techniques in the building industry in order to create perspectives for their application to buildings. Passive techniques such as thermal insulation in reducing building heating and cooling loads have been widely studied in the literature [7][8][9][10][11][12]. All these authors agree that thermal insulation has an essential effect on ensuring and guaranteeing better thermal comfort in the building. ...
New concepts and ecological material called Poncebloc are investigated in this paper. This material is proposed as structural and thermal insulation for building envelope due to its excellent mechanical and thermophysical properties. For this motive, an in-situ building constructed with classical material largely used in Moroccan construction is monitored during one year and then modelized numerically using TRNSYS to perform a comparison of thermal and energy performance of two buildings one constructed with Poncebloc and the second one with classical materials and this for two types of climate semi-arid represented by Marrakech city and cold represented by Ifrane. The proposed concept is economically efficient as the results show a reduction in cooling energy needs of 66% and 97% for Marrakech and Ifrane, respectively; it also decreased the heating need by 44% and 42% for Marrakech and Ifrane respectively. Consequently, the bioclimatic building leads to a net reduction in GHG emissions of 60% and 45% for Marrakech and Ifrane, respectively, compared to the reference case.
... An uninsulated roof could, therefore, be a source of heat and generate more consumption of air conditioning. In this sense, Ouhaibi et al. (Ouhaibi et al. 2018) conducted a study on the interest of envelope insulation. It has been shown that in semi-arid areas, roof insulation is more recommended than walls and floors because it is most exposed to direct sunlight in summer all day long. ...
The external roof is considered to be a key component in building energy consumption; this is why special attention is addressed to improving its thermal performance. This paper starts with numerical modeling of a multilayered roof exposed to the real climate of Morocco. The model is validated through our experimental results in the case of a reduced scale cavity. The numerical model is used to compute the annual loads of cooling to compare different configurations using two types of insulation (Rock wool and Expanded polystyrene).The results start with the determination of the optimum thickness of thermal insulation using an economic model based on life-cycle cost analysis, and this is for three different climate regions. The distribution of this optimum thickness between the roof layers is studied according to the annual cooling loads. Then, the four configurations were studied to evaluate the most suitable location of the insulation in the roof using the optimal thickness. The results show that the optimum insulation thickness varies between 0.03 and 0.07 m, with an energy gain between 63 and 75%, depending on the region and the type of insulation. Moreover, the integration of insulation in the roof demonstrates its environmental effectiveness by reducing GHG emissions by an average factor of three. The results also show that insulation location is beneficial to reduce the energy need, especially that of cooling. It is seen that the minimum temperature swings and peak load occur in the case that insulation is placed inside, outside, and in the middle of the roof, with a significant energy saving of about 92% for Fez, 90% for Marrakech and 89% for Ouarzazate.
