Today, clean and renewable energy technologies are receiving more attention in scientific research. Among the most promising is solar energy. Numerous devices have been created to harness this energy and convert it into electrical power. Researchers have recently become interested in the solar chimney, which is less common than PV system and have a poor efficiency. Recently, the exploitation and use of solar chimneys have grown significantly due to their simplicity and wide application potential. The study of the effects of ambient temperature and solar radiation on absorber and collector mean temperature in a solar chimney was the objective of this experimental study. A solar chimney prototype with a collector diameter of 1 m equipped with 10 temperature sensors (5 on the absorber and 5 on the collector in the same plan) was constructed. The experiments were conducted in an arid climate. The variation of the ten temperature sensors within these locations, as well as the ambient temperature and solar radiation, has been carried out every minute. The findings show that ambient temperature and solar radiation have an impact on the mean temperatures of the absorber and collector. The evolution of the mean absorber and collector temperatures as a function of solar radiation and ambient temperature has been described by a mathematical model (polynomial). The models were validated using R² and RMSE statistical indicators. The model temperatures fit well the experimental results.

Higher collector and absorber temperatures result in increased air circulation speed within the solar chimney, as well as increased the chimney solar power and efficiency. Similarly, the absorber and collector temperatures in the solar chimney are influenced by the materials selection and the absorber and collector design.