Results 11 to 20 of about 824,135 (227)
Energies, 2022 Nowadays, pump-turbine units have to experience multiple start-stops every day to balance the power production and consumption on the grid. During the transient process of turbine start-up, the hydraulic forces applied to the head-cover would change ...
Zhengwei Wang +5 more
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Technique for designing and optimization of the Francis turbine blade system [PDF]
Омский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2023 A technique for designing the blade systems of Francis turbine is proposed. Starting with the determination the main parameters of the turbine components, where it is compatible with the operation of a hydraulic turbine at a given head.
M. Omran +3 more
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Energies, 2020 Taking the hydraulic wind turbine as the research object, the method is studied to improve the utilization ratio of wind energy for hydraulic wind turbine, when the wind speed is lower than the rated wind speed.
Chao Ai +6 more
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Numerical analysis of a new cross-flow type hydraulic turbine for high head and low flow rate
Engineering 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
semanticscholar +1 more source
Comparative analysis of air and water flows in simplified hydraulic turbine models
, 2022 This article presents a comparative analysis of flow characteristics behind a hydraulic turbine runner in air and water. Swirling flow with a precessing vortex core (PVC) was investigated using a laser Doppler anemometer and pressure pulsation sensors ...
S. Skripkin +5 more
semanticscholar +1 more source
Numerical Simulation of Hydraulic Turbine During Transient Operation Using OpenFOAM
IOP Conference Series: Earth and Environment, 2021 Power generation from intermittent renewable energy resources (e.g. wind, solar) requires regulation of the electric grid. Although most hydraulic turbines are designed to work in their best efficiency points, nowadays they are being used more often ...
S. Salehi +3 more
semanticscholar +1 more source
Research on control system for improving the grid-connected efficiency of small hydropower
Energy Reports, 2023 Aiming at the problem of low efficiency at low flow in small hydropower stations, a permanent magnet direct-drive hydropower generation control system based on dual PWM converters is proposed to realize wide-range variable-speed constant-frequency ...
Xingyang Hu +4 more
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Common Failures in Hydraulic Kaplan Turbine Blades and Practical Solutions
Materials, 2023 Kaplan turbines, as one of the well-known hydraulic turbines, are generally utilized worldwide for low-head and high-flow conditions. Any failure in each of the turbine components can result in long-term downtime and high repair costs.
Waleed Khalid Mohammed Ridha +2 more
semanticscholar +1 more source
Control design, implementation, and evaluation for an in-field 500 kW wind turbine with a fixed-displacement hydraulic drivetrain [PDF]
Wind 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
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PENGARUH SUDUT KEMIRINGAN TERHADAP PUTARAN DAN DAYA HIDROLISIS PADA TURBIN ARCHIMEDES SCREW PORTABLE
Rekayasa Mesin, 2022 Picohydro Power Plant is one of the renewable energy sources which utilizes water or irrigation channels with a small head and flow rate. Many factors can affect the hydrolysis power and also the power on the rotation of the screw turbine, one of which ...
Gunawan Rudi Cahyono +3 more
doaj +1 more source