Now showing items 1-20 of 32

  • 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 ...
  • 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 ...
  • 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 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 ...
  • 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 ...
  • Feasibility of detecting natural frequencies of hydraulic turbines while in operation, using strain gauges 

    Valentín Ruiz, David; Presas Batlló, Alexandre; Bossio, Matias; Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen (Multidisciplinary Digital Publishing Institute (MDPI), 2018-01-10)
    Article
    Open Access
    Nowadays, hydropower plays an essential role in the energy market. Due to their fast response and regulation capacity, hydraulic turbines operate at off-design conditions with a high number of starts and stops. In this ...
  • Impianti idroelettrici nel Piemonte 

    Fernández de Landa Sebal, Ilaski (Universitat Politècnica de Catalunya / Politecnico di Torino, 2008)
    Master thesis (pre-Bologna period)
    Restricted access - confidentiality agreement
  • Influence of the boundary conditions on the natural frequencies of a Francis turbine 

    Valentín Ruiz, David; Ramos Martín, David; Bossio, Matias; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen (Institute of Physics (IOP), 2016)
    Conference report
    Open Access
    Natural frequencies estimation of Francis turbines is of paramount importance in the stage of design in order to avoid vibration and resonance problems especially during transient events. Francis turbine runners are submerged ...
  • Large eddy simulation of partial cavitation around a 2D plane-convex hydrofoil 

    Hidalgo, V.; Escaler Puigoriol, Francesc Xavier; Soto, R.; Valencia, E.; Cando, E.; Luo, X. (2015-02-02)
    Article
    Open Access
    Investigations of attached partial cavitation are important because to prevent damages in hydrulic machinery and to reduce the costs. As expected computational fluid dynamics (CFD) methods have been developed for more ...
  • Leakage localization in water distribution using data-driven models and sensitivity analysis 

    Jensen, Tom Nørgaard; Puig Cayuela, Vicenç; Romera Formiguera, Juli (2018-01-01)
    Article
    Restricted access - publisher's policy
    Water scarcity is becoming an increasing problem worldwide, and an issue compounding the problem is water leakage in the piping networks delivering potable/consumable water to end-users (Sensus, 2012). In this paper, we ...
  • Microturbinas para generación eléctrica en redes de abastecimiento de agua potable de Cataluña 

    Sanz Noguera, Víctor (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2013-10)
    Master thesis
    Open Access
    La búsqueda de energías alternativas, renovables, no contaminantes e inagotables está en la orden del día. En esta memoria se da una idea de cómo obtener energía de este tipo a partir de microturbinas instaladas en las ...
  • Modal behavior of a reduced scale pump-turbine impeller. Part I. Experiments 

    Escaler Puigoriol, Francesc Xavier; Hutter, J.K.; Egusquiza Estévez, Eduard; Farhat, Mohamed; Avellan, F. (2010)
    Conference lecture
    Restricted access - publisher's policy
    An experimental investigation has been carried out to quantify the effects of surrounding fluid on the modal behavior of a reduced scale pump-turbine impeller. The modal properties of the fluid-structure system have been ...