Results 41 to 50 of about 5,160 (221)
Energies, 2022 This article presents a study on the performance characteristics of a Francis turbine operating with various guide vane openings to determine the best operating point based on unit quantities.
Megavath Vijay Kumar +8 more
doaj +1 more source
Financial Management, EarlyView.ABSTRACT We examine how mergers and acquisitions (M&As) enable firms to adapt to climate policy shocks. Exploiting the adoption of the Nitrogen Oxides (NOx) Budget Trading Program (NBP) across US states as an exogenous shock, we find that firms with NOx‐emitting plants subject to the NBP are more likely to engage in M&As, particularly through vertical ...
Samer Adra +3 more
wiley +1 more source
Detection of Hydraulic Phenomena in Francis Turbines with Different Sensors [PDF]
Sensors, 2019 Nowadays, hydropower is demanded to provide flexibility and fast response into the electrical grid in order to compensate the non-constant electricity generation of other renewable sources. Hydraulic turbines are therefore demanded to work under off-design conditions more frequently, where different complex hydraulic phenomena appear, affecting the ...
Valentín Ruiz, David +4 more
openaire +4 more sources
Microstructure Engineering Toward High Cost‐Effective Nd–Fe–B Sintered Magnets: A Review
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Nd–Fe–B sintered magnets, critical for enhancing electromechanical conversion efficiency and operational stability in wind turbines and electric vehicle drives, are prized for their outstanding coercivity, high remanence, and superior maximum energy product.
Dongmin Zhang +5 more
wiley +1 more source
Experimental Physiology, Volume 111, Issue 7, Page 3267-3279, 1 July 2026.Abstract This study investigated cerebral and neuromuscular responses to three exercise models: time trial (TT), maximal oxygen uptake (V̇O2max${{\dot{V}}_{{{{\mathrm{O}}}_2}{\mathrm{max}}}}$) and time to exhaustion (TTE). Fourteen participants completed the tests in the following order: V̇O2max${{\dot{V}}_{{{{\mathrm{O}}}_2}{\mathrm{max}}}}$, TT and ...
Caroline V. Robertson +3 more
wiley +1 more source
Flow-Induced Strength Analysis of Large Francis Turbine Under Extended Load Range
Applied SciencesTo meet the load requirements of the power grid, the hydroelectric power plants need to extend the operational load range of the turbine units, which are often operated under off-design operating conditions.
Xingping Liu +3 more
doaj +1 more source
The Dynamic Characteristics and Control of a Hydraulic Turbine
Measurement + Control, 1969 A dynamic model of a radial flow turbine was derived. The model was verified by tests on an experimental 5 hp Francis type turbine. The tests indicate that the model is adequate for control system design.
I. Djordjevic Dipl.Ing +3 more
doaj +1 more source
Vulnerability of Bats in Australia to Wind Turbine Mortality: A Trait‐Based Assessment
Austral Ecology, Volume 51, Issue 6, June 2026.ABSTRACT Wind turbine collisions are a leading cause of bat mortality globally, yet the vulnerability of Australian bat taxa remains poorly understood. Trait‐based assessments offer a valuable method for evaluating mortality risk in the absence of data on species‐ and region‐specific turbine interactions.
Carissa V. Harris, Christopher Turbill
wiley +1 more source
EnergiesSecondary flows in Francis turbines are induced by the presence of a gap between guide vanes and top–bottom covers and rotating–stationary geometries. The secondary flow developed in the clearance gap of guide vanes induces a leakage vortex that travels ...
Nirmal Acharya +4 more
doaj +1 more source
Do not be Afraid of Small High-Speed Francis Turbines
Journal of Mechanical Engineering, 2018 In the first quarter of the last century hydraulic power plants were equipped with high-speed Francis turbines even in the situation when a contemporary project manager would suggest Kaplan turbine. The reason is simple. Mr.
Libor Koudelka
doaj +1 more source