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Dissertations / Theses on the topic 'Kaplan-Turbine'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Helali, Assia. "Optimisation d'une turbine de type Kaplan." Grenoble INPG, 2006. http://www.theses.fr/2006INPG0078.

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Confrontés au problème d'optimisation des turbomachines, le souci des constructeurs est de disposer de méthodes de tracé rapides, fiables et suffisamment précises. Le présent travail de recherche, s'inscrit dans ce contexte. Ainsi nous avons mis au point une démarche complète de conception et d'optimisation des géométries du distributeur et de la roue d'une turbine axiale de type Kaplan. Cette démarche emploie des codes numériques pour l'analyse de l'écoulement et également un outil d'optimisation. La première étape de ce travail consiste à étudier l'écoulement tridimensionnel à l'aide de logi

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2

Fjærvold, Lars. "Improvements of a Kaplan type small turbine : Forbedre og vidreutvikle en Kaplan småturbin." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16774.

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The goal with this master thesis was to establish Hill diagrams and improve a Kaplan turbine intended for use in Afghanistan. The turbine efficiency has been tested in setting 1 and 2. Turbine efficiency in setting 3 and 4 could not be tested because the runner blades interfere with the housing making it impossible to rotate the turbine. The efficiency was tested with an effective pressure head ranging from 2 to 8 meters. Best efficiency point was not reached because of limitations in the test rig making it impossible to reach a lower effective head. The best efficiencies tested in the two di

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3

Bergström, Stina. "Added Properties in Kaplan Turbine - a preliminary investigation." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60925.

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A preliminary investigation of the added properties called added mass, added damping and added stiffness have been performed for a Kaplan turbine. The magnitude of dimensionless numbers have been used in order to classify the interaction of the fluid and the solid. The classification is done to bring clarity in which of the added properties are of importance for the system. The diameter of the runner and the hub have been calculated using the power output and the head for a Kaplan turbine. These dimensions have been used to determine the magnitude of the dimensionless numbers along with the ve

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4

Böhm, Christian. "Numerische Simulation des Fischdurchgangs durch Wasserturbinen." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974170887.

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5

Gustafsson, Martin. "Improved Governing of Kaplan Turbine Hydropower Plants Operating Island Grids." Thesis, KTH, Reglerteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-125805.

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To reduce the consequences of a major fault in the electric power grid, functioning parts of the grid can be divided into smaller grid islands. The grid islands are operated isolated from the power network, which places new demands on a faster frequency regulation. This thesis investigates a Kaplan turbine hydropower plant operating an island grid. The Kaplan turbine has two control signals, the wicket gate and the turbine blade positions, controlling the mechanical power. The inputs are combined to achieve maximum turbine efficiency at all operating points. In relative terms, the wicket gate

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6

Bijukchhe, Vijaya. "Comparison of experimental results of horizontal kaplan turbine with computational fluid dynamics." Thesis, University of Iowa, 2012. https://ir.uiowa.edu/etd/3263.

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Hydropower has been the source of renewable energy for more than a century leading to reduction in burning of fossil fuels which has impact on the environment. More and more efficient hydro turbines have been developing for the power production with focus on the hydrodynamic behavior of the turbines. Emerging numerical codes specially designed to evaluate the efficiency of the turbine these days has made design of turbine a step ahead. This project is contracted by AMJET Turbine System to evaluate the hydrodynamic, electrical and mechanical properties of a turbine prototype scaled to 1:7.828.

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7

Turi, Flavia. "Prédiction de l'influence de la cavitation sur les performances d'une turbine Kaplan." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAI051.

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La présence de structures de vapeur dans la machine peut provoquer des dommages structurels et altérer les performances de la turbine. Ainsi, l’étude de la cavitation dans les machines hydrauliques est d’un très grand intérêt pour les industriels. Parmi les turbines hydrauliques, les turbines Kaplan sont réputées pour leur flexibilité. En effet, l’ouverture des directrices et la position des aubes de la roue peuvent être régulées en continu pendant l’utilisation de la machine, optimisant son rendement sur une large plage de fonctionnement. En contrepartie, Cela implique la présence de jeux ent

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8

Nyman, Timmy. "Experimental Investigation of Added Mass and Damping on a Model Kaplan Turbine for Rotor Dynamic Analysis." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67573.

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The concept of added hydrodynamic properties such as added mass is of importance in modern hydropower development, mainly for rotor dynamic calculations. Added mass could result in reduced natural frequencies and altered mode compared to existing simulation models. It is of importance to quantify added mass but also added damping to make the simulation models more accurate. Experiments are conducted on a model Kaplan turbine, D = 0,5 m, and a steel cube, S = 0,2 m, for linear vibrations in still water confined in a cylindrical tank. The experiments are conducted in air and water for evaluation

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9

Gustafsson, Annica. "Analysis of uncertainties in fatigue load assessment : a study on one Kaplan hydro turbine during start operation." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264237.

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In the future, hydropower plants are expected to operate more flexibly. This will lead to a more varied operation of the turbine and the generator, such as more start and stop in order to stabilise the frequency in the grid. Studies show that these transient operations are more costly in terms of fatigue degradation, i.e. consumption of fatigue life. Vattenfall has developed a methodology with the aim to analyse fatigue loads, acting on the runner and the rotor in hydropower units during operation. With a numerical model, the loads are assessed with input data gathered from measurements togeth

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10

Ezhov, Alexey. "Plánování a řízení projektu modernizace Kaplanovy turbíny." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2021. http://www.nusl.cz/ntk/nusl-443026.

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This master’s thesis solving the issue of planning and management of Kaplan turbine modernization project. The first chapter deals with the basic definition of project management concepts, methods, techniques and tools used in project planning and management. This information forms theoretical basis for the following two chapters, which represent the company in which the turbine modernization project itself will be implemented in the future. The second chapter contains analyzes of external and internal environment of the company and the project. On their basis the third chapter creates a speci

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11

Stark, Tina. "Machine learning for condition monitoring in hydropower plants using a neural network." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75303.

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The hydro power industry stands for new challenges due to a more fluctuating production fromwind and solar power. This requires more regulation of the production in the hydro powerstations, which increases maintenance demands. An oil leakage has not only consequencessuch as downtimes and maintenance costs, but also an environmental impact. Skellefte ̊aKraft is working towards reaching a condition based maintenance. Therefore, the purpose ofthis master thesis is to develop a model using a feedforward neural network to predict the oillevel in the control system of a Kaplan turbine and map which

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12

Santolin, Alberto. "Procedure per la progettazione standardizzata delle turbine delle piccole centrali idroelettriche." Doctoral thesis, Università degli studi di Padova, 2009. http://hdl.handle.net/11577/3426010.

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The thesis presents the definition and development of standardized design procedures of three type of hydraulic turbines for small hydraulic power plants: Pelton, Francis and Kaplan. In order to properly define the design parameter of each type of turbine, a technical-economical criterion was first applied to the flow duration curves of the turbine installation sites. Then, the critical aspects of the design procedure of each type of turbine were analyzed. As regards the Pelton turbines, a numerical investigation of the interaction between the jet and the bucket is presented. Unsteady numerica

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13

Wu, JenHao. "Reliability analysis for small wind turbines using Bayesian hierarchical modelling." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/29015.

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In this thesis, the reliability of small wind turbines is studied. Both conventional reliability analysis methods and the novel Bayesian models (Bayesian Hierarchical Modelling (BHM)) are used to analyse the reliability performance of the Gaia-Wind turbines / assemblies and components of the Gaia-Wind turbine. In Chapter 2, a simple failure mode and effect analysis (FMEA) is conducted. An approximated risk priority number (RPN) is calculated for each failure mode and assembly. The assembly that is identified to have the highest RPN is the "Rotor and Blade Assembly". As for the failure modes, "

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14

Patočka, Filip. "Studie proveditelnosti průtočné MVE." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226148.

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The aim of the present master’s thesis is to explore the feasibility of small hydropower plant for cur-rent hydro energetic potential of the weir on Ohře river, located in the city of Terezín in Ústecký re-gion, Czech Republic. The target of the thesis itself was to design minimally two variants of constructional and technological part. Due to requirements related to maintaining of all functions of the weir construction was decided to design small hydropower plant completely under the water surface, with flap mounted to the roof of the hydropower plant. Part of the thesis was also an economica

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15

Paštěka, František. "Projekt malé vodní elektrárny pro konkrétní lokalitu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228743.

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This master's thesis is specialised in designing of small hydropower plant for specific location. In work should be designed suitable turbine for parameters found on the site, then created a basic project documentation of small hydropower plant with all devices and used principles, so that the plant would be capable of operation. In the next part of thesis should be extented the calculation of flow in the turbine delivery and assessed effect of geometry of turbine delivery on the flow.

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16

Forsström, William. "Utredning av frekvensregleringens påverkan på mekanisk utrustning i en kaplanturbin." Thesis, Uppsala universitet, Elektricitetslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-247261.

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As a consequence of increasing wind power installations in the Nordic grid the last years, the need for regulating power has become larger. In the Nordic grid, regulating power is mainly provided by hydro power. One part of the regulating power is called frequency control, which ensures that the grid frequency is stable and close to 50 Hz. However, setting the turbine into frequency controlled operation may cause stress and wear of the components in the mechanical control system. Frequency controlling implies large and frequent servo forces and longer travelling distance of the sliding bearing

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17

Bolek, Marek. "Studie MVE v rámci plavebního stupně Přelouč II." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392200.

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The aim of this dissertation is to prepare a study of a small hydroelectric power plant as part of the Přelouč navigation level II. The preparation deals with one of the possible variants for the layout design of given constructions. The layout design of a weir with an adjacent lock chamber which secures navigability for the stretch of the Elbe River located between the river kilometers 949,23 and 951,20 near the city of Přelouč in the Pardubice District is also included in the study. The introduction chapter contains the assessment of the environment, which is followed by the specification of

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18

Žák, František. "Výpočet savky turbiny na zadané parametry." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319248.

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This diploma thesis describes design of a new shape of the draft tube for small hydro Katovice with maintaining built dimension. First part of this thesis is devoted to the formulation of the problem, description of basic function of the draft tube, its efficiency and other formulas. In the second part of this thesis the analysis is made for original design supported by CFD calculation. Furthermore a new design of the draft tube is made with comparison of original draft tube.

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19

Čípa, Jiří. "Návrh spirály k původní kašnové turbině Katovice." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228748.

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The diploma thesis should identify inconsistencies of the small hydraulic power plant Katovice. The fountain water turbine is now running in slower delivery because the original Francis high speed turbine achieved much smaller flow than a Kaplan type turbine. The aim of the thesis is a project of a spiral case and a distributor for the Kaplan turbine, which should work in higher flow and should be run in its optimum. This project will serve as a base for construction of distributor and spiral case for the small hydraulic power plant Katovice.

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20

Karnik, Macaya Yohanna. "Vattennivåreglering i Avesta Lillfors : På uppdrag av Fortum Generation AB." Thesis, KTH, Data- och elektroteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146658.

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I denna rapport utreds olika metoder för att kunna reglera vattennivån i vattenkraftverket Avesta Lillfors i Dalarna. Två kraftverk ligger endast 900 m uppströms och detta gör att svarstiderna blir korta och regleringen blir lätt nervös. Att använda sig av vattennivåreglering i ett kraftverk för-enklar dess styrning då anpassning till inflödet sker automatiskt. En flödestabell har tagits fram genom mätningar i turbinen, med hjälp av Winter-Kennedy-metoden. Denna tabell används för att kunna fram-koppla regulatorn och därmed dämpa stora variationer i inflödet. Dessu-tom har en modell av älven s

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21

Kratina, Jakub. "Studie MVE v rámci plavebního stupně Přelouč II." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392114.

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The content of this diploma thesis is a feasibility study of a small hydropower station within the navigation lock Přelouč II. This work builds on the framework proposal of one variation of layout arragement of the navigation lock. In this variant is considered to build a lock, which also includes a small hydropower station. At the beginning, the location of individual building objects is resolved with respect to the conditions in the locality. This is followed by a more detailed development of the building and technological part of a small hydropower plant. Part of the thesis is accompanying

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22

Fredriksson, Jonatan. "Anpassning av småskaliga vattenkraftverk för ö-drift av lokalt elnät." Thesis, Uppsala universitet, Elektricitetslära, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388143.

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This master thesis examines technical requirements for small hydro power plants (HPP) to operate proximate parts of the power grid in island mode. The work examines how small hydropower can be modified and complemented with additional technologies to achieve sufficient frequency control capabilities. A case study was performed within the concession area of power grid operator Ålem Energy. One of the HPPs, located in Skälleryd, is owned by Ålem Energy and became the focal point of the study. Relevant parts of the concession area were surveyed for properties such as system inertia, electric load

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23

Holmström, Henrik. "Preliminary simulation of Porjus U9 turbine at speed no load." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74378.

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Hydropower plants are shifting towards operating at off-designed conditions, meaning that the number of start-stop cycles and maintenance time due to cavitation increases. The speed no-load condition is the moment before magnetization of the generator, i.e., no load, low flow, constant runner rotational speed, guide vane and runner blade angle. Since no load is applied, the water dissipates its energy in forms of highly recirculating and turbulent flow. This master thesis aim is to simulate the speed no-load condition on the Porjus U9 turbine and validate numerical values against experimental

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24

Рябова, Світлана Олександрівна. "Гідродинамічне удосконалення поворотно-лопатевої гідротурбіни на основі використання просторового профілювання лопатей робочого колеса". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29700.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.05.17 – гідравлічні машини та гідропневмоагрегати. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертацію присвячено вирішенню важливої науково-технічної задачі покращення енергетичних характеристик проточної частини низьконапірної осьової гідротурбіни. Виконано огляд науково-технічних джерел щодо методів досліджень гідродинамічних процесів у проточних частинах поворотно-лопатевих гідротурбін. За результатами чисельних досліджень просторової течії в'язкої нестисл

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25

Рябова, Світлана Олександрівна. "Гідродинамічне удосконалення поворотно-лопатевої гідротурбіни на основі використання просторового профілювання лопатей робочого колеса". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29696.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.05.17 – гідравлічні машини та гідропневмоагрегати. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертацію присвячено вирішенню важливої науково-технічної задачі покращення енергетичних характеристик проточної частини низьконапірної осьової гідротурбіни. Виконано огляд науково-технічних джерел щодо методів досліджень гідродинамічних процесів у проточних частинах поворотно-лопатевих гідротурбін. За результатами чисельних досліджень просторової течії в'язкої нестисли

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26

Štefan, David. "Struktura proudění a energetické přeměny v kolenové sací troubě." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229640.

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Draft tube is very important part of hydraulic turbines. Only optimum work together with turbine can bring highest performance of this machine set. Hence it is necessary to deal with character of flow in the draft tube for different operating conditions. Efficiency of the draft tube depends on many phenomena of flow. Observing these phenomena and finding their relation with energetic transformation in the draft tube is a suitable tool to judge quality of draft tube performance. Incorrect design of the draft tube can sometimes cause lower efficiency of whole machine set. The goal of this thesis

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