Ghodbane, ,MokhtarMokhtarBoumeddane, BoussadKhechekhouche, AbderrahmaneBenmenine, Djamel2023-05-142023-05-142020-04-10Ghodbane ,Mokhtar. Boumeddane, Boussad. Khechekhouche, Abderrahmane. Benmenine, Djamel . Study of a solar air conditioning system with ejector. International Journal of Energetica. Vo5. No 10.10/04/2020.faculty of technology. university of el oued. [visited in ../../….]. available from [copy the link here]2543-3717http://dspace.univ-eloued.dz/handle/123456789/22823ArticleAir conditioning is one of the indispensable conditions of well-being in human life, so the face of this research to provide this basic necessity in remote areas and in desert places far from power grids. To achieve this goal, solar air conditioning has been adopted, where the compressor was replaced by an ejector, a parabolic trough solar collector coupled with a thermal generator and a small pump; this means that the solar air conditioner does not need a huge amount of electrical energy to operate. This paper is studding the optical and thermal efficiency of the solar collector used as a solar thermal generator, refrigeration subsystem performance (COPejc) and system thermal ratio of the studied air conditioner, where the cooling load is estimated at 18 kW. This work has allowed to acquire very important knowledge about R718 ejector solar air conditioners. Bouzaréah was chosen as the region to conduct this numerical study on June 11th, 2018. Regarding performance of the studied air conditioning subsystem (COPejc) is 0.6235. As for the PTC solar reflector subsystem, its mean optical performance is 75.74 % and its mean thermal performance is 65.01 %. Regarding the overall performance of the studied air conditioner, its mean value is 0.407enSolar energy; Water (R718); Ejector; System Thermal Ratio (STR).Article