Now showing items 1-20 of 45

  • Accurate determination of the frequency response function of submerged and confined structures by using PZT-patches 

    Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Bossio, Matias (2017-03-22)
    Article
    Open Access
    To accurately determine the dynamic response of a structure is of relevant interest in many engineering applications. Particularly, it is of paramount importance to determine the Frequency Response Function (FRF) for ...
  • Added mass effects of attached cavitation on the blades of a Francis runner 

    Huang, Xingxing; Escaler Puigoriol, Francesc Xavier (2016)
    Conference report
    Open Access
  • Advanced condition monitoring of Pelton turbines 

    Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Presas Batlló, Alexandre; Valentín Ruiz, David; Bossio, Matias; Egusquiza Estévez, Eduard (2017)
    Conference report
    Restricted access - publisher's policy
    The ability of hydropower to adapt the electricity generation to the demand is necessary to integrate wind and solar energy to the grid. Nowadays hydropower turbines are required to work under harsher operating conditions ...
  • Analysis of the dynamic response of pump-turbine runners. Part I: Experiment 

    Presas Batlló, Alexandre; Valero Ferrando, Ma. del Carmen; Huang, Xingxing; Egusquiza Estévez, Eduard; Farhat, Mohamed; Avellan, François (IOPScience, 2012)
    Conference lecture
    Restricted access - publisher's policy
    When in operation, pump-turbine runners have to withstand large pressure pulsations generated by the rotor-stator interaction. The analysis of the dynamic behavior of these structures is necessary to avoid damage. For this ...
  • An integrated procedure for the structural design of a composite rotor-hydrofoil of a Water Current Turbine (WCT) 

    Oller Aramayo, Sergio A.; Nallim, Liz G.; Oller Martínez, Sergio Horacio (2013-12)
    Article
    Restricted access - publisher's policy
    This paper shows an integrated structural design optimization of a composite rotor-hydrofoil of a water current turbine by means the finite elements method (FEM), using a Serial/Parallel mixing theory (Rastellini et al. ...
  • A river bed hydrokinetic turbine: a laminated composite material rotor design 

    Oller Aramayo, Sergio A.; Nallim, Liz G.; Oller Martínez, Sergio Horacio; Martínez García, Javier (International Centre for Numerical Methods in Engineering (CIMNE), 2017)
    Book
    Open Access
    This chapter presents the composite materials applied to Water Current Turbine (WCT) hydrokinetic turbines. Here will be briefly described the features of these turbines, the fluid-dynamic behavior of the rotor, and its ...
  • Assessment of remote cavitation detection methods with flow visualization in a full scale francis turbine 

    Escaler Puigoriol, Francesc Xavier; Vilberg, Ingrid; Ekanger, Jarle; Francke, H; Kjeldsen, Morten (2018)
    Conference report
    Open Access
    This paper describes the experimental investigations carried out in the Francis turbine at Svorka power plant operated by Statkraft in Norway. The unit, with a head of 260 m, can deliver a maximum output load of 25 MW. The ...
  • CFD study of the Rotor-Stator Interaction in a Francis turbine 

    Herranz Tomás, Jordi (Universitat Politècnica de Catalunya, 2016-04-26)
    Bachelor thesis
    Open Access
    En el següent treball de fi de grau, el qual forma part d'un projecte dirigit pel CDIF (Centre de Diagnòstic Industrial i Fluïdodinàmica), es pretén realitzar l'estudi del model geomètric d'un prototip real d'una turbina ...
  • Condition monitoring of a prototype turbine. Description of the system and main results 

    Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard; Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Montagut, Mònica; Bossio, Matias (Institute of Physics (IOP), 2017)
    Conference report
    Open Access
    The fast change in new renewable energy is affecting directly the required operating range of hydropower plants. According to the present demand of electricity, it is necessary to generate different levels of power. Because ...
  • Condition monitoring of pump-turbines. New challenges 

    Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Valentín Ruiz, David; Presas Batlló, Alexandre; Rodriguez Godoy, Cristian (2015-05)
    Article
    Open Access
    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 ...
  • Detection and analysis of part load and full load instabilities in a real Francis turbine prototype 

    Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen (Institute of Physics (IOP), 2017)
    Conference report
    Open Access
    Francis turbines operate in many cases out of its best effici ency point, in order to regulate their output power according to the instantaneous ener gy demand of the grid. Therefore, it is of paramount importance to analyse ...
  • Dynamic response of the MICA runner. Experiment and simulation 

    Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Bossio, Matias (Institute of Physics (IOP), 2017)
    Conference report
    Open Access
    Studying the dynamic response of Francis turbine runners is of paramount importance in order to avoid resonance problems during operating conditions. For this purpose, the natural frequencies as well as their associated ...
  • Effects of attached blade cavitation on the natural frequencies of a Francis runner 

    Escaler Puigoriol, Francesc Xavier; Huang, Xinxing (Shanghai University Press, 2019)
    Conference report
    Open Access
    Effects of attached blade cavitation on the natural frequencies of a Francis runner
  • Estudi de l’aprofitament de recursos hídrics de la Serra de Tramuntana a l’illa de Mallorca 

    Melis Sancho, Jaume (Universitat Politècnica de Catalunya, 2013-06)
    Bachelor thesis
    Open Access
  • Estudi de les mesures realitzades en una turbina hidràulica Kaplan de 10MW 

    Mendoza Rodríguez, Francisco José (Universitat Politècnica de Catalunya, 2017-06-15)
    Bachelor thesis
    Open Access
    Aquest projecte consisteix en el tractament i posterior anàlisi d’unes mesures realitzades amb diferents sensors instal·lats en una turbina Kaplan per a detectar diferents comportaments en funció de la càrrega a la qual ...
  • Estudi de l’impacte del raig d’aigua sobre les pales d’una turbina Pelton mitjançant simulació numèrica CFD 

    Grimalt Fusté, Jordi (Universitat Politècnica de Catalunya, 2007-06)
    Master thesis (pre-Bologna period)
    Open Access
    El projecte es basa en l’estudi, mitjançant la simulació numèrica CFD utilitzant el programari comercial FluentINC, de l’impacte d’un raig d’aigua contra la pala d’una turbina Pelton. En aquest document el lector trobarà ...
  • Estudi dels tubs d'aspiracions de turbines hidràuliques 

    Meseguer Flaqué, Berta (Universitat Politècnica de Catalunya, 2009-06)
    Master thesis (pre-Bologna period)
    Open Access
    El projecte és l’estudi dels tubs d’aspiració de turbines hidràuliques d’acció i la definició d’un procediment per realitzar la geometria i el mallat del tub d’aspiració de forma parametritzada, d’aquesta manera s’aconsegueix ...
  • Experimental study of a vibrating disk submerged in a fluid-filled tank and confined with a nonrigid cover 

    Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica (2017-04-01)
    Article
    Restricted access - publisher's policy
    Determining the dynamic response of submerged and confined disklike structures is of interest in engineering applications, such as in hydraulic turbine runners. This dynamic response is heavily affected by the added mass ...
  • Experimental study on the added mass and damping of a disk submerged in a partially fluid-filled tank with small radial confinement 

    Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen (2014-07-16)
    Article
    Restricted access - publisher's policy
    The dynamic response of submerged and confined disk-like structures is of interest in engineering applications, such as in hydraulic turbine runners. This response is difficult to be estimated with accuracy due to the ...
  • Extension of operating range in pump-turbines. Influence of head and load 

    Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard; Presas Batlló, Alexandre; Valentín Ruiz, David; Bossio, Matias (2017-12-19)
    Article
    Open Access
    Due to the increasing share of new renewable energies like wind and solar in the generation of electricity the need for power regulation and energy storage is becoming of paramount importance. One of the systems to store ...