THEORETICAL AND EXPERIMENTAL ESTIMATION METHODS OF THE AMBIENT TEMPERATURE BY THREE SEMI-EMPIRICAL MODELS ON THE SITE OF THE CITY OF OUAGADOUGOU

Weather parameters such as ambient temperature fundamentally influence the cost effectiveness and performance of solar energy conversion systems. The optimization of solar energy converters depends on the ambient temperature model used. Our work consists in determining the theoretical model of the temperature which is close to the reality in the city of Ouagadougou. The study was conducted at the Laboratory of Environmental Physics and Chemistry of the Joseph KI-ZERBO University and lasted three months. We have chosen to simulate three semi-empirical models of ambient temperature. The different models are evaluated on a graphical and statistical basis, using statistical indicators such as the coefficient of determination R2, the root mean square error (RMSE) and the mean absolute error percentage (MAPE). The equations for the different ambient temperature models were programmed with matlab software. The experimental curves were smoothed with the Excel software. A validation of the obtained results is established by comparing the theoretical values calculated by matlab of the three models of the ambient temperature with the experimental data obtained at the National Agency of Meteorology of Burkina Faso. Our research work proved that among the three models, the Capderou model presents the best estimate of the ambient temperature in the city of Ouagadougou. The reason for this research work is that measuring stations are rare in underdeveloped countries. Sometimes the use of numerical simulation of a theoretical model is more than necessary because it allows to compensate a little for the lack of experimental data on a physical phenomenon. This study will allow not only to estimate to a few degrees Celsius the ambient temperature by the Capderou theoretical model but also to predict in the long term the ambient temperature in the city of Ouagadougou.