Microencapsulation of phase change materials in a building roof

The cities with hot climates in Morocco are subjected during the summer period to a maximum temperature around 45°C. This latter is out of human comfort range, and results in sweltering temperature inside houses cause of the common materials used in the construction. In order to address to this, the objective of this study is to integrate the microcapsules of phase change materials in the building roof, starting by a numerical validation with experimental results of literature, then we will carry out a parametric study on different axes which are: the effect of different PCM position. Then, the effect of microencapsulated PCM amount allowing to have an optimal thermal performance. Finally, the results showed that the best roof configuration guaranteeing optimal thermal comfort for a hot climate in summer period was when the paraffin n-octadecane PCM was incorporated in the mortar layer close to the internal environment with a percentage incorporation of 20%, and allowing to have a phase shift of 7h with a decrease in temperature of 1°C.