Communications Internationales

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    Improvement of the Meca-Electrical Wind Pumping System
    (Institute of Electrical and Electronics Engineers Inc, 2023) Djalloul, Achour; Mohamed, Kesraoui
    In this paper an improvement in the mecha-electrical water pumping system is proposed in order to increase the efficiency, the reliability and the flexibility. PV solar panels are added to a system that composed of a wind turbine for mechanical driving of the piston pump. A water storage is used to charge a battery through a DC machine in case of abundance of wind energy. Reversely it will supply electricity in motoring situations where a mechanical support is needed by the wind turbine to drive the piston pump. Adding another renewable source like PV solar panels will increase the assurance of pumping water permanently especially in cut offs situations where even the water storage is not enough to charge the battery. The whole system is presented, electrically and mathematically modeled. Simulation work has been performed and satisfying results in terms of water quantity increase compared to the basic system have been obtained.
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    Numerical study of the performance loss of a centrifugal pump carrying emulsion
    (2021) Achour, Lila; Mathieu, Specklin; Belaidi, Idir; Kouidri, Smaine
    The performance and hydrodynamic behavior of cen- trifugal pumps when handling two-phase liquid-liquid flow and emulsion remain relatively unexplored, al- though they are of fundamental importance in optimiz- ing the operating conditions of these pumps. Hence, this study aims at investigating the performance degra- dation of a centrifugal pump under emulsion flow by combined means of analytical and computational fluid dynamic (CFD) models. The analytical approach is based on internal energy loss equations while the CFD approach models the emulsion as a continuous and ho- mogeneous single-phase fluid exhibiting shear thinning behavior. The results give a good insight into the per- formance degradation of such a system, especially at the best efficiency point (BEP).