Results 31 to 40 of about 250 (179)

Comparative Numerical Studies for the Flow Energy Dissipation Features in a Vertical Two‐Stage Centrifugal Pump in Pump and Turbine Conditions

Energy Science &Engineering, Volume 14, Issue 2, Page 764-779, February 2026.
Based on entropy theory, this study presents a comparative numerical analysis of the flow energy dissipation (FED) in a VTSP under two distinct operating conditions: pump condition and turbine condition, both characterized by relatively high hydraulic efficiencies of 88.9% and 87.4%, respectively. In pump condition, the highest FED production occurs in
S. Liu, T. P. Chen, Y. Li, M. Q. Liang, Y. J. Zhang, X. Z. Wei   +5 more
wiley   +1 more source

Numerical investigation of Pelton bucket geometries for performance improvement

Frontiers in Mechanical Engineering
The Pelton turbine is the most effective impulse turbine and has excellent operational performance in high water heads as well as low water rates. The bucket splitter design plays a crucial role, as its design is responsible for its efficiency. The water
Hiren Shah, Gaurangkumar Chaudhari, Vijay Dhiman, Ravi Bhatt, Sachin Salunkhe, Sachin Salunkhe, Lenka Cepova   +6 more
doaj   +1 more source

CASTING IMPROVEMENT BASED ON METAHEURISTIC OPTIMIZATION AND NUMERICAL SIMULATION

Facta Universitatis. Series: Mechanical Engineering, 2017
This paper presents the use of metaheuristic optimization techniques to support the improvement of casting process. Genetic algorithm (GA), Ant Colony Optimization (ACO), Simulated annealing (SA) and Particle Swarm Optimization (PSO) have been considered
Radomir Radiša, Nedeljko Dučić, Srećko Manasijević, Nemanja Marković, Žarko Ćojbašić   +4 more
doaj   +1 more source

Advances in research on impulse hydro‐turbine technology

River, Volume 5, Issue 1, Page 112-133, February 2026.
Abstract To accelerate the development of impulse hydro‐turbines and support the efficient utilization of hydropower resources in Southwest China, this paper examines the background, historical development, and research progress of impulse hydro‐turbines.
Xiaochao Li, Ye Zhou, Hao Zhang, Guanglei Xiao, Yanwei Li, Zhongxin Gao, Zhiyang Lu, Shangqi Li   +7 more
wiley   +1 more source

A Review on Hydropower Hybridization for Frequency Containment, Objectives and Dimensions of Auxiliary Energy Storage

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
This review synthesizes academic works on hybridized hydropower systems, focusing on control strategies and energy storage sizing to address objectives such as operational cost reduction (wear mitigation in Kaplan/Francis turbines), revenue enhancement through primary frequency regulation, and resilience improvements like black‐start capability.
Viktor Döhlen, Henrik Lindsjö, Kent Bertilsson   +2 more
wiley   +1 more source

Energy and Exergy Analysis of a Gas‐Cooled Nuclear Reactor System for Sustainable Hydrogen Generation

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This study presents a comprehensive energy and exergy analysis of a multigeneration system driven by the waste thermal energy of a modular high‐temperature nuclear reactor. The proposed configuration simultaneously delivers electricity, liquid hydrogen (H2), freshwater (FW), heating, and cooling.
Murat Koc, Denis Osinkin
wiley   +1 more source

Effect of Injector Needle Tip Shape on Jet Flow for Pelton Turbine

Energies
The Pelton turbine has been widely applied for the advantages of its simple structure, flexible mass flow rate, wide range of applicable heads and high efficiency. The nozzle and needle are a core part of the Pelton turbine injector.
Chun Zhang, Chao Wang, Qianhe Tian, Quanwei Liang, Yilin Zhu, Yexiang Xiao, Yong Bai, Zhaoning Wang, Hengte Zhou, Xianwu Luo   +9 more
doaj   +1 more source

Instabilities and influence of geometric parameters on the efficiency of a pump operated as a turbine for micro hydro power generation: A review

Journal of Sustainable Development of Energy, Water and Environment Systems, 2021
Compared to a traditional turbine (Kaplan, Francis, Pelton), pumps operated as turbine are a good alternative for micro hydroelectric power plants thanks to their low cost and easy availability.
Jonathan Graciano-Uribe, Jorge Sierra, Edwar Torres-Lopez   +2 more
doaj   +1 more source

Investigation of the Erosion Characteristics in the Distribution Parts of Pelton Turbine

Journal of Applied Fluid Mechanics, 2021
Pelton turbine, as its working principle, can perform in the high head condition especially in the southwest mountainous region in China. When the flow contains silt, it will induce the erosion in the bucket and needle structure which affects the ...
L. Han, Y. Wang, G. F. Zhang, X. Z. Wei
doaj  

Proposal of a Parameterized Methodology for the Hydrodynamic Design of High‐Efficiency Pelton Rotors Validated by Multiphase CFD Simulations

International Journal of Rotating Machinery, Volume 2026, Issue 1, 2026.
This work presents and validates a direct analytical methodology for the parametric hydrodynamic design of Pelton rotors. The proposed approach combines a one‐dimensional theoretical framework for defining global geometric rotor parameters with an inductive method for generating bucket geometry, formalized from a comprehensive mapping of a high ...
Daniel O. Silva, Ramiro Gustavo Ramirez Camacho, Celso Antonio B. Sales Junior, Angie Lizeth Espinosa Sarmiento, Pramita Mishra   +4 more
wiley   +1 more source