Results 11 to 20 of about 2,868 (215)
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
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Investigations on static and dynamic properties of liquid annular seals by a new transient numerical method with circular whirl model [PDF]
AIP AdvancesAnnular seals are employed in centrifugal pumps to inhibit leakage for reducing the effect of leaking fluid on the main flow. However, the seals generate fluid excitation forces while controlling the leakage flow, which seriously compromises the ...
Fengqin Li +6 more
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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
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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
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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
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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
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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
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Hydrodynamic and experimental characterization of pumps as turbines
Dyna, 2023 To estimate the performance, efficacy, modes of operation, hydrodynamic instabilities, and methodologies for harnessing energy from the pump as turbine (PAT), it is necessary to characterize these hydraulic turbomachines in all their modes of operation ...
Daniel Felipe Tobón-Espinosa +3 more
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Nonlinear Modeling of Dynamic Characteristics of Pump-Turbine [PDF]
Energies, 2022 Hydropower is a kind of clean energy, which can effectively reduce the consumption of fossil energy and is one of the main fields of new energy development. Pumped storage power station not only provides a solution for storing electric energy and generating excess, but also is a clean, efficient, economical and safe power system regulation method with ...
Liying Wang, Kaidi Zhang, Weiguo Zhao
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Research on configuration and performance of water ramjet pressurized water intake system
Xibei Gongye Daxue Xuebao, 2023 Water ramjet is the most ideal power propulsion device for high-speed underwater weapons. However, failure to start it at low-speed makes it hard for the engine to be widely used.
YANG Hao +5 more
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