Results 21 to 30 of about 41,738 (228)

CFD Applications in Energy Engineering Research and Simulation: An Introduction to Published Reviews [PDF]

open access: yes, 2019
Computational Fluid Dynamics (CFD) has been firmly established as a fundamental discipline to advancing research on energy engineering. The major progresses achieved during the last two decades both on software modelling capabilities and hardware ...
Iranzo Paricio, Jose Alfredo
core   +1 more source

Quantification of over-speed risk in wind turbine fleets [PDF]

open access: yes, 2011
The effective life management of large and diverse fleets of wind turbines is a new problem facing power system utilities. More specifically, the minimization of over-speed risk is of high importance due to the related impacts of possible loss of life ...
Ault, Graham, Mcmillan, David
core   +1 more source

Adjustable speed operation of a hydropower plant associated to an irrigation reservoir [PDF]

open access: yes, 2008
This paper deals with the issue of adjustable speed operation (ASO) of hydropower plants. The main idea of this technique is to allow the turbine speed to change in accordance with hydraulic conditions, thus improving the overall unit efficiency. General
Bartle   +7 more
core   +2 more sources

Power Swing Generated in Francis Turbines by Part Load and Overload Instabilities

open access: yesEnergies, 2017
Hydropower plays a key role in the actual energy market due to its fast response and regulation capacity. In that way, hydraulic turbines are increasingly demanded to work at off-design conditions, where complex flow patterns and cavitation appear ...
David Valentín   +5 more
doaj   +1 more source

Research and development of a gravitational water vortex micro-HPP in the conditions of Kyrgyzstan

open access: yesEnergy Reports, 2023
The field of research in this article is small-capacity hydropower conversion plants. The object of the study is the turbines of low-pressure micro hydro power plants ( micro HPP) that convert the energy of velocity head into electrical energy.
Alaibek Obozov   +5 more
doaj   +1 more source

Performance of a centrifugal pump running in inverse mode [PDF]

open access: yes, 2004
This paper presents the functional characterization of a centrifugal pump used as a turbine. It shows the characteristics of the machine involved at several rotational speeds, comparing the respective flows and heads.
Engeda A.   +5 more
core   +1 more source

Control design, implementation, and evaluation for an in-field 500 kW wind turbine with a fixed-displacement hydraulic drivetrain [PDF]

open access: yesWind Energy Science, 2018
The business case for compact hydraulic wind turbine drivetrains is becoming ever stronger, as offshore wind turbines are getting larger in terms of size and power output. Hydraulic transmissions are generally employed in high-load systems and form an
S. P. Mulders   +2 more
doaj   +1 more source

Generator of microelectric power plants for low-potential watercourses [PDF]

open access: yesОмский научный вестник, 2022
The development of autonomous power supply systems based on micro-hydroelectric power plants using the energy of small watercourses is associated with the fulfillment of a number of contradictory requirements.
R. N. Khamitov   +4 more
doaj   +1 more source

Influence of the boundary conditions on the natural frequencies of a Francis turbine [PDF]

open access: yes, 2016
Natural frequencies estimation of Francis turbines is of paramount importance in the stage of design in order to avoid vibration and resonance problems especially during transient events.
Bossio, Matias   +5 more
core   +1 more source

A Model for Selecting the Most Cost-Effective Pressure Control Device for More Sustainable Water Supply Networks [PDF]

open access: yes, 2019
Pressure Reducing Valves (PRV) have been widely used as a device to control pressure at nodes in water distribution networks and thus reduce leakages. However, an energy dissipation takes place during PRV operation.
Fernández García, I.   +2 more
core   +1 more source

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