Low Carbon technology in the Distribution Network [PDF]
, 2018 Každý rok mají obnovitelné zdroje větší dopad a více pronikají do distrubučních sítí. Tato diplomová práce podrobně popisuje tři nejčastěji využívané obnovitelné zdroje energie v současnosti - solární, větrnou a vodní.
Miljkovic Nikola
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An Ensemble Prognostic Method of Francis Turbine Units Using Low-Quality Data under Variable Operating Conditions. [PDF]
Sensors (Basel), 2022 Duan R, Liu J, Zhou J, Wang P, Liu W.
europepmc +1 more source
Flow Field Analysis of Francis Turbine Draft Tube using POD at Design and Part Load Operating Conditions [PDF]
Journal of Applied Fluid MechanicsThe hydraulic turbines, especially Francis turbines, frequently run at part load (PL) conditions to meet the dynamic energy needs. The flow field at the runner exit changes significantly with a change in the operating point.
S. Kumar, M. J. Cervantes, B. K. Gandhi
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Flexible operation of Francis turbines
, 2023 With the planned cuts in emissions, more of the electric energy will have to come from renewable sources. Two of the largest potential sources are wind- and solar, which have the downside of also being intermittent and non-dispatchable. Since the electricity production must match the consumption, other energy producers in a grid must increase their ...
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Failure analysis of a Francis turbine runner
IOP Conference Series: Earth and Environmental Science, 2010 The variable demand on the energy market requires great flexibility in operating hydraulic turbines. Therefore, turbines are frequently operated over an extended range of regimes. Francis turbines operating at partial load present pressure fluctuations due to the vortex rope in the draft tube cone.
D Frunzǎverde +6 more
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Testing and Numerical Analysis of Abnormal Pressure Pulsations in Francis Turbines
EnergiesDuring the flood season, Francis turbines often operate under low-head and full-load conditions, frequently experiencing significant pressure pulsations, posing potential threats to the safe and stable operation of the units.
Lu Jia +4 more
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Comprehensive Hydraulic Improvement and Parametric Analysis of a Francis Turbine Runner
Energies, 2019 Hydraulic turbines are usually required to operate in a wide range. The operation at off-design conditions not only reduces the unit efficiency, but also significantly deteriorates the dynamic stability of the turbines.
Zhe Ma +3 more
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Development of a regenerative pump impeller using rapid manufacturing techniques [PDF]
, 2010 This paper presents a method of rapid manufacture used in the development of a regenerative pump impeller. Rapid manufacturing technology was used to create complex impeller blade profiles for testing as part of a regenerative pump optimisation process ...
Quail, Francis J. +2 more
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Design optimization method for Francis turbine
IOP Conference Series: Earth and Environmental Science, 2014 This paper presents a design optimization system coupled CFD. Optimization algorithm of the system employs particle swarm optimization (PSO). Blade shape design is carried out in one kind of NURBS curve defined by a series of control points. The system was applied for designing the stationary vanes and the runner of higher specific speed francis ...
H Kawajiri, Y Enomoto, S Kurosawa
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Experimental study of air delivery into water-conveyance system of the radial-axial turbine
EPJ Web of Conferences, 2017 The paper presents an experimental study of oscillatory response in the Francis turbine of hydraulic unit. The experiment was performed on large-scale hydrodynamic test-bench with impeller diameter of 0.3 m.
Maslennikova Alexandra +3 more
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