Results 11 to 20 of about 6,081 (269)
Journal of Mechatronics, Electrical Power, and Vehicular Technology, 2022 The use of a pump as opposed to a turbine/pump as turbine (PAT) for off-grid electrification applications is one of the important ways to be considered in efforts to equalize electrical energy in Indonesia.
Sarid Mejiartono +2 more
doaj +1 more source
Performance of a centrifugal pump running in inverse mode [PDF]
, 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
The acceleration effect of pump as turbine system during starting period
Scientific Reports, 2023 In order to reveal the influence of starting acceleration on starting process of a pump as turbine system, this paper carries out a numerical calculation of the three-dimensional viscous unsteady flow of pump as turbine circulating piping system under ...
Yu-Liang Zhang, Jin-Fu Li, Zu-Chao Zhu
doaj +1 more source
Energies, 2022 The heat pump system has been widely used in residential and commercial applications due to its attractive advantages of high energy efficiency, reliability, and environmental impact.
Abbas Aghagoli +2 more
doaj +1 more source
Influence of the boundary conditions on the natural frequencies of a Francis turbine [PDF]
, 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
1D simulation of pump-turbine transition [PDF]
Journal of Physics: Conference Series, 2017 Variable speed motor-generators based on full size converter offer new options for operation of reversible pump-turbines. To explore the challenges related with this new technology a specific test rig configuration is developed to perform such transition with a PT reduced scale model.
N Ruchonnet, O Braun
openaire +1 more source
Dynamic safety assessment of a nonlinear pumped-storage generating system in a transient process [PDF]
, 2019 This paper focuses on a pumped-storage generating system with a reversible Francis turbine and presents an innovative framework for safety assessment in an attempt to overcome their limitations.
Abbassi, Rouzbeh +8 more
core +4 more sources
Numerical study on the internal flow field of a reversible turbine during continuous guide vane closing [PDF]
, 2017 The unsteady flow field in a reversible pump-turbine is investigated during the continuous load rejection using a 3D computational fluid dynamic analysis.
Benini, Ernesto +3 more
core +1 more source
Internal Flow Phenomena of Two-Way Contra-Rotating Axial Flow Pump-Turbine in Pump Mode under Variable Speed [PDF]
Journal of Applied Fluid Mechanics, 2022 This paper investigated the variable speed operation of a two-way contra-rotating axial flow pump–turbine in pump mode. When counter-rotating impellers operate at the same speed, a significant difference exists in the shaft power of the two impellers ...
C. An +5 more
doaj +1 more source
Condition monitoring of pump-turbines. New challenges [PDF]
Measurement, 2015 At present, pumped storage is the only system to store huge amounts of energy. The surplus of energy in the electrical grid is used for pumping water from a lower to a higher reservoir (pump operation). At peak hours or in case of emergency this water goes down generating electrical energy (turbine operation).
Egusquiza Estévez, Eduard +4 more
openaire +3 more sources