Prédiction des performances des pompes centrifuges sous l'influence de la viscosité des liquides en utilisant la méthode Taguchi

Dans ce travail, une méthode statistique basée sur le plan d’expérience de Taguchi a été utilisée pour déduire les équations de prédictions des courbes de performances d'une pompe centrifuge pour différents liquides (l’Eau et huile Teska). Le facteur de la viscosité des liquides testés a été utilisé dans cette méthode de prédiction afin de calculer la hauteur, la puissance absorbée, la puissance hydraulique et le rendement de la pompe pour deux vitesses de rotation.Un montage expérimental représenté par un banc d’essai de la Pompe Centrifuge a été utilisé pour obtenir les résultats expérimentaux.Une convergence a été trouvée lorsque les résultats prévus (méthode de Taguchi) et expérimentaux ont été comparés.Mots-clés: Pompe centrifuge, Viscosité, Méthode de TaguchiEnglish Title: Prediction of performances of centrifugal pumps under the influence of the viscosity of liquids using the Taguchi methodEnglish AbstractIn this work, a statistical method based on the Taguchi experimental design was used to derive prediction equations from the performance curves of a centrifugal pump for different liquids (water and oil Teska).The viscosity factor of tested liquids was used tocompute the head, absorbed power, hydraulic power and pump efficiency at two rotational speeds. An experimental setup represented by a centrifugal Pump test rig was used in order to obtain experimental data. A convergence was reached when the predicted (Taguchi method) and experimental results were compared.Keywords: Centrifugal pump, Viscosity, Taguchi method

Understanding the impact of desert stressors factors on standard PV panel performance: Case study of Algeria's desert

Compared to moderate climate conditions, hot and dry environment, as known desert, present the most difficult environment that affects negatively PV panels performance. In the present paper, the root causes that have the major contribution in PV panel performance degradation in desert climates and the direct relationship between desert climate factors and accelerate degradation mechanism are analyzed. Algeria's desert is chosen as a case to study, an overview of Algeria's desert climate has been presented. High solar irradiation accompanied by high ambient temperature has been considered as the most responsible for accelerated discoloration and initiating damage of EVA encapsulant material which can create a challenge for long-term reliability of c-Si PV panels. The declared 20–25 year PV panel lifetime is very optimistic in Algeria's desert climates. This research work can be beneficial in future studies on challenges related to the optimal performance and the expected operating lifetime of photovoltaic applications in desert climates