U.P.B. Sci. Bull., Series D, Vol. 82, Iss. 1, 2020 ISSN 1454-2358 INFLUENCE OF THE GEOMETRIC AND MECHANICAL PARAMETERS ON THE TEMPERATURE EVOLUTION WITHIN THE TUBES OF A RECEIVER FROM A SOLAR POWER TOWER Messaoud HAZMOUNE 1 , Benaoumeur AOUR 2 , Xavier CHESNEAU 3 , Gheorghe LAZAROIU 4 , Mohamed Mandji HADJIAT 5 , Mohamed DEBBACHE 6 , Dana-Alexandra CIUPAGEANU 7 The receiver of a solar power tower raises many issues concerning efficiency and system safety. Hence, the analysis of the various parameters affecting the performances of the solar receiver is required. This paper aims to investigate the variation of the system’s performance as a response to several modifications, such as fluid velocity variation, receiver’s piping thickness modification, and change of the material. The solar tower receiver has the front half of piping heated and the behind piping surface at ambient temperature, the geometry consisting of two parts (fluid and solid) that interact. Simulations are performed with ANSYS CFX. A uniform mesh is generated by the ICEM. Thermal, mechanical and dynamic analyses of this solar receiver have been carried out. Simulation data obtained with ANSYS Fluent were compared with the experimental ones. The increase of the inlet velocity determines a decrease in the outlet temperature; the dependence between the thickness and the outlet temperature is a proportional one, as they are submitted to the conduction effect. Regarding the material analysis, the researches have shown that Alloy 625 is the most effective, because of its mechanical and thermal proprieties. Keywords - Solar power tower, solar receiver, Ansys CFX, heat transfer. 1 PhD Student, Laboratoire de Biomécanique Appliquée et Biomatériaux, Département de Génie Mécanique, Ecole Nationale Polytechnique d'Oran BP 1523 El Mnaour, Oran 31000, Algérie 1 Researcher, Centre de Développement des Energies Renouvelables BP. 62 Route de l'Observatoire Bouzareah 16340 Alger, Algérie haz_mess@yahoo.fr 2 Professor, Laboratoire de Biomécanique Appliquée et Biomatériaux, Département de Génie Mécanique, Ecole Nationale Polytechnique d'Oran BP 1523 El Mnaour, Oran 31000, Algérie ben_aour@yahoo.fr 3 Senior Lecturer, Laboratoire de Mathématiques et Physique, Université de Perpignan Via Domitia - Bât.B - 2e étage 52 avenue Paul Alduy - 66860 PERPIGNAN Cedex France. chesneau@univ-perp.fr 4 Professor, University POLITEHNICA of Bucharest, Splaiul Independentei 313, Sector 6, Bucharest, Romania RO-060042 glazaroiu@yahoo.com 5 Researcher, Centre de Développement des Energies Renouvelables BP. 62 Route de l'Observatoire Bouzareah 1 6340 Alger, Algérie mhadjiat@gmail.com 6 Researcher, Centre de Développement des Energies Renouvelables BP. 62 Route de l'Observatoire Bouzareah 16340 Alger, Algérie md.debbache@gmail.com 7 PhD Student, University POLITEHNICA of Bucharest, Splaiul Independentei 313, Sector 6, Bucharest, Romania RO-060042, dana_ciupageanu@yahoo.com.