STUDY OF THE THERMAL BEHAVIOUR OF AN EXPERIMENTAL BUILDING AT THE NATIONAL RESEARCH CENTRE FOR DEVELOPMENT IN CHAD

This experimental study of thermal behaviour is being carried out as part of the search for solutions to exploit local building materials. It focuses on an experimental analysis of a 24 m2 office-type cell built in N\\\'Djamena. Measurements of the temperature and humidity of the indoor and outdoor air and of the walls of the envelope were taken using hygrothermal sensors of the SHT75 and SHT35 types. Temporal variations in temperature were determined on the internal and external faces of the walls, as well as in the walls making up the envelope of this cell. The results obtained were used to analyse and understand the operation of the experimental cell envelope and its thermal behaviour. The thermal input through the roof is greater, as the temperature at sheet level reaches 56.80°C at the same time as the outside temperature reaches 41.70°C. An overheating effect occurs in the attic ceiling. This analysis showed that the experimental cell did not meet the required thermal comfort conditions of a maximum temperature of 29°C according to the literature. These results have made it possible to understand and analyse the thermal behaviour of the cell.