Results 51 to 60 of about 3,833 (190)

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

open access: yesEnergy 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   +5 more
wiley   +1 more source

A Study of Technical, Economic and Social Factors Affecting Micro-Hydropower Plants in Nepal [PDF]

open access: yes, 2019
Due to slow expansion of the national grid, many rural areas of Nepal depend on micro-hydropower plants to provide electricity to homes and businesses.
Bikram Karki, Prem   +5 more
core   +3 more sources

Dual Frequency Regulation in Pumping Mode in a Wind–Hydro Isolated System

open access: yesEnergies, 2018
Frequency control is one of the most critical tasks in isolated power systems, especially in high renewable penetration scenarios. This paper presents a new hydropower pumped-storage dual control strategy that combines variable-speed-driven pumps and ...
José Ignacio Sarasúa   +3 more
doaj   +1 more source

Numerical analysis of a new cross-flow type hydraulic turbine for high head and low flow rate

open access: yesEngineering Applications of Computational Fluid Mechanics, 2021
Cross-flow turbines have recently been proposed for energy recovery in aqueducts when the outlet pressure is greater than zero, owing to their constructive simplicity and good efficiency within a large range of flow rates and head drops.
Calogero Picone   +3 more
doaj   +1 more source

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

open access: yesIET 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   +2 more
wiley   +1 more source

Comprehensive Review of Pump as Turbine

open access: yesRenewable Energy and Sustainable Development, 2019
The turbine is a heart of power generation in a hydro-electric power system. A variety of different turbines are available for the purpose. The common types of Hydraulic turbines are; Pelton, cross flow, Francis, Kaplan, and propeller turbine.
Abdulbasit Nasir Jemal   +1 more
doaj   +1 more source

Incremental Model Order Reduction of Smoothed‐Particle Hydrodynamic Simulations

open access: yesInternational Journal for Numerical Methods in Fluids, Volume 97, Issue 12, Page 1571-1594, December 2025.
The paper presents the development of an incremental singular value decomposition strategy for compressing time‐dependent particle simulation results, addressing gaps in the data matrices caused by temporally inactive particles. The approach reduces memory requirements by about 90%, increases the computational effort by about 10%, and preserves the ...
Eduardo Di Costanzo   +3 more
wiley   +1 more source

Potential of the Archimedes screw to generate sustainable green energy for mini, micro, and pico hydro Turbine power stations: An extensive analysis

open access: yesEnergy Strategy Reviews
The Archimedes Screw Turbine (AST) is an innovative type of hydroelectric power plant that can be particularly useful in locations with very low-head sites (less than 10 m head).
Robin Thakur   +6 more
doaj   +1 more source

A community electrification project: combination of microgrids and household systems fed by wind, PV or micro-hydro energies according to micro-scale resource evaluation and social constraints [PDF]

open access: yes, 2014
When electrifying isolated rural communities, usually standardized solutions have been implemented using the same technology at all the points. However these solutions are not always appropriate to the community and its population.
Chiroque, José   +4 more
core   +2 more sources

Photo‐Electrodialysis for Brackish Water Desalination: A Life Cycle Sustainability Assessment from Experimental Insights

open access: yesEnergy Technology, Volume 13, Issue 9, September 2025.
This study explores the integration of solar energy with electrodialysis (ED) for sustainable freshwater generation. A photoactive electrode enhances ion transport, reducing external energy inputs and environmental impacts compared to conventional ED.
Namra Mir, Burak Yuzer, Yusuf Bicer
wiley   +1 more source

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