Results 11 to 20 of about 1,539,229 (306)
Sustainability, 2023 Pumped storage hydropower plants are renewable energy systems that are effective in saving energy and solving electricity peak-on shortage. Seawater pumped storage hydropower plants are a novel type of pumped storage hydropower plant specifically ...
Jianyong Hu +5 more
semanticscholar +1 more source
Research on the Vortex Rope Control Techniques in Draft Tube of Francis Turbines
Energies, 2022 Francis turbines are most widely used in hydropower due to their characteristics which include a fast response and wide time-scale operation. The vortex rope inside Francis turbines is a common flow phenomenon, which always causes strong vibration ...
Lei Wang +6 more
semanticscholar +1 more source
Optimization of the Shape of a Hydrokinetic Turbine's Draft Tube and Hub Assembly Using Design-by-Morphing with Bayesian Optimization [PDF]
Computer Methods in Applied Mechanics and Engineering, 2022 Finding the optimal design of a hydrodynamic or aerodynamic surface is often impossible due to the expense of evaluating the cost functions (say, with computational fluid dynamics) needed to determine the performances of the flows that the surface controls.
H. M. Sheikh +3 more
semanticscholar +1 more source
Energies, 2022 The present paper demonstrates a proof-of-concept by introducing a variable guide vane system in the draft tube of a high-head Francis model turbine. The aim is to examine the hydraulic performance of the turbine while mitigating the pressure pulsations ...
J. Joy, M. Raisee, M. Cervantes
semanticscholar +1 more source
Prediction of the particle circulation rate in a draft tube spouted bed suspension dryer [PDF]
Journal of the Serbian Chemical Society, 2006 A model for predicting the particle circulation rate in a draft tube spouted bed dryer with inert particles is proposed and verified. The calculation algorithm requires three input values: the gas velocity in the draft tube one data point for the static ...
Arsenijević Zorana Lj. +2 more
doaj +3 more sources
Influence of axial water jet size on RVR mitigation in draft tube of Francis turbine
IOP Conference Series: Earth and Environment, 2022 The present work investigates the effect of the axial water jet nozzle size on the unsteady pressure fluctuations arising from RVR formation in the draft tube of a Francis turbine operating at part load.
S. Khullar +4 more
semanticscholar +1 more source
Jurnal Teknik Mesin, 2023 A Microhydro Power Plant (MHP) with hydrocoil turbine in Sukajaya Lembang Village, Bandung, West Java, has been successfully designed. However, the velocity of the water flow after exiting the hydrocoil turbine is still relatively high, so there is still
Fahmi Hidayat +2 more
doaj +1 more source
Draft Tube Vortex Rope Analysis of a Pump-turbine Unit under Different Operating Conditions
IOP Conference Series: Earth and Environment, 2022 Pumped-storage power stations which can be flexibly adjusted for power generation and energy storage, are widely constructed worldwide. Pumped-storage units work under different operating conditions according to the demand of the power grid, and vortex ...
Q. He +5 more
semanticscholar +1 more source
Optimization design of the elbow draft tube of the hydraulic turbine
IOP Conference Series: Earth and Environment, 2022 The draft tube of the hydraulic turbine serves to recover the kinetic energy of the water flow that leaves the runner. The amount of this energy depends on the turbine type, its specific speed and flow capacity.
A. Semenova +6 more
semanticscholar +1 more source
Influence of Guide Vane Profile Change on Draft Tube Flow Characteristics of Water Pump Turbine
Processes, 2022 In order to study the influence of the change of the guide vane airfoil on the flow characteristics in the draft tube of a reversible hydraulic turbine, a reversible hydraulic turbine was used as the object of study, and the effect of the change on the ...
Qifei Li +4 more
semanticscholar +1 more source