The effects of the diffuser vane on the performances of the multistage centrifugal pump were investigated experimentally, taking account of the interactions among the diffuser vane, the return vane, and the next stage impeller. It is very important to match well the diffuser vane with the return vane, for improving the hydraulic efficiency of the pump. The efficiency may be more improved by mak...

Abstract Hydropower plants (HPPs) are acknowledged to be fundamental assets provide generation flexibility power systems hosting substantial amount of stochastic renewable energy sources. Within this context, providing enforces HPP units cross-over transient operating conditions or operate in off-design conditions. The evaluation the impact that such transients have on hydraulic machines is a s...

the goal of this research is the derivation of method for evaluation of efficiency improvement potential for district heating systems with focus on variable speed centrifugal pump. the effectiveness of the usage of the proportional pressure control is compared with the constant pressure control. this is why, energy calculation analyses have been realized for variable speed centrifugal pumps, an...

Now a day centrifugal pumps are vital components of industries. Certainly, one of the most important specifications of centrifugal pumps are the performance curves. In the present work, performance curves of a centrifugal pumps are obtained by Computational fluid dynamics (CFD) and as an outcome, CFD results compare by practical curves. At the first step impeller and volute are designed with tw...

Abstract To implement energy savings in multistage centrifugal pumps, a return channel is utilized to replace the origin inter-stage flow structure, and then single-objective optimization work containing high-precision numerical simulation, design variable dimensionality reduction, machine learning conducted obtain optimal geometric parameters. The reduction process based on Spearman correlatio...