Results 21 to 30 of about 255 (182)

Transient Analysis of Pelton Turbine Prototypes

IOP Conference Series: Earth and Environmental Science, 2021
Abstract One of the most critical operating conditions in hydraulic turbines is the start-up transient. This may be characterized by the presence of several resonances, which increase the vibration and stress levels on the runners. At present, its study is of interest due to the more frequent starts and stops of the turbines in the last ...
Egusquiza Montagut, Mònica, Valentín Ruiz, David, Valero Ferrando, Ma. del Carmen, Presas Batlló, Alexandre, Egusquiza Estévez, Eduard   +4 more
openaire   +2 more sources

Dénoyer une galerie en charge pour améliorer la flexibilité d’une centrale hydroélectrique

LHB Hydroscience Journal, 2022
Le développement des nouvelles sources d’énergie renouvelable de nature intermittente nécessite de disposer de sources d’énergie flexibles également d’origine renouvelable afin de garantir la stabilité du réseau électrique et les engagements ...
Jean Decaix, Anthony Gaspoz, Vlad Hasmatuchi, Matthieu Dreyer, Christophe Nicolet, Steve Crettenand, Cécile Münch-Alligné   +6 more
doaj   +1 more source

MODELING AND STUDY OF HYDROELECTRIC GENERATING SETS OF SMALL HYDRO POWER PLANTS WITH FREQUENCY-CONTROLLED PERMANENT MAGNET SYNCHRONOUS GENERATORS

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2016
Currently, the hydroelectric generating sets of small HPPs with Pelton turbines employ as their generating units conventional synchronous generators with electromagnetic excitation.
R. I. Mustafayev, L. G. Gasanova, M. M. Musayev   +2 more
doaj   +1 more source

Embedding Rule‐Based Augmented Reality Scaffolding in Experiential Learning Cycles: An SEM Study of Student Engagement in Lab‐Based STEM

Computer Applications in Engineering Education, Volume 34, Issue 5, September 2026.
ABSTRACT Augmented reality (AR) is increasingly used in STEM laboratories, but its pedagogical value depends on how digital guidance is embedded within structured physical learning activities rather than on technological novelty alone. This study examined an AR‐supported hydropower laboratory activity designed around Kolb's experiential learning cycle ...
Khuong Nguyen‐Vinh, Minh Anh Hoang, Thanh Chi Pham, Linh Duc Tran   +3 more
wiley   +1 more source

Adaptive Turbine Replacement Improves Hydropower Flexibility in a Changing Climate

Water Resources Research, Volume 62, Issue 8, August 2026.
Abstract Hydropower plants will operate under new conditions as water regimes shift, reservoir operating rules evolve, and the grid requires flexible balancing of wind and solar. Hydropower plant turbine systems are traditionally designed to operate at the highest efficiency within narrow ranges of flow and reservoir levels while deviations from design
Veysel Yildiz, Nathalie Voisin, Marta Zaniolo   +2 more
wiley   +1 more source

Integrated Renewable Energy for Urban and Remote Communities: Hybrid Solutions with Hydro Pumped Storage and Green Hydrogen Opportunities

Advanced Sustainable Systems, Volume 10, Issue 5, May 2026.
Urban and remote communities face inefficiencies from centralized power grids. This study assesses hybrid renewable energy systems with storage, integrating pumped hydro and hydrogen. Through modeling and optimization, demand–supply balance improves. The base case achieves low LCOE, strong returns, and energy export potential.
Helena M. Ramos, J. E. Q. Fuentes, E. Bekçi, Oscar E. Coronado‐Hernández, Alban Kuriqi, Rui Castro, Modesto Pérez‐Sánchez   +6 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

Using Multiple Regression Models and Methods to Estimate Fatigue‐Life Distributions and Construct Constant‐Life Diagrams

Applied Stochastic Models in Business and Industry, Volume 42, Issue 2, March/April 2026.
ABSTRACT Fatigue is the most common reliability failure mechanism and has been studied widely since the 19th century. Material specimens are used in laboratory experiments to obtain fatigue test data. An S‐N curve is used to depict the relationship between the stress (or strain) S$$ S $$ and the number of cycles to failure N$$ N $$. Statistical methods
Diaz F. Aksioma, William Q. Meeker, Huaiqing Wu   +2 more
wiley   +1 more source

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