Enviaments recents

  • Experimental Investigation of the Cavitation Effects on the Heat Generation in a Closed Loop Pumping System 

    Bermejo Plana, David; Escaler Puigoriol, Francesc Xavier; Dular, Matevz; Ruiz Mansilla, Rafael (2018)
    Text en actes de congrés
    Accés obert
    A series of tests were carried out in the cavitation tunnel of the Laboratory for Water and Turbine Machines of the University of Ljubljana in order to investigate the effects of cavitation in the water heating process of ...
  • Numerical simulation of the micro-jet velocity and cavitation-erosion on an axisymmetric nozzle 

    Hidalgo, V.; Escaler Puigoriol, Francesc Xavier; Luo, Xianwu; Valencia, E. (2018)
    Text en actes de congrés
    Accés obert
    The present study deals with the numerical study of the micro-jet velocity and the cavitation - erosion on an axisymmetric nozzle, which presents high ow unsteadiness and aggressiveness. The proposed model is based on ...
  • 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)
    Text en actes de congrés
    Accés obert
    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 ...
  • Sensitivity analysis of zwart-gerber-belamri model parameters on the numerical simulation of francis runner cavitation 

    Escaler Puigoriol, Francesc Xavier; Roig Bauzà, Rafel; Hidalgo, Víctor (2018)
    Text en actes de congrés
    Accés obert
    A series of numerical simulations of the 3D cavitation development in the GAMM Francis turbine runner were carried out with the Zwart-Gerber -Belamri (ZGB) two-phase model available in ANSYS ¿ CFX v16.2. The aim of the ...
  • Mathematical modeling, numerical simulation and experimental comparison of the desorption process in a metal hydride hydrogen storage system 

    Busqué Somacarrera, Raquel; Torres Cámara, Ricardo; Grau Barceló, Joan; Roda Serrat, Vicente; Husar, Attila Peter (2018-01-01)
    Comunicació de congrés
    Accés obert
  • Relación de la nota de selectividad y la nota media del primer y segundo curso de los Grados de Energía y Mecánica de la EUETIB 

    López López, José; Buenestado Caballero, Pablo; Grau Barceló, Joan; Martínez Sánchez, Joan; Torres Cámara, Ricardo; Alcaraz Sendra, Olga (2018)
    Comunicació de congrés
    Accés obert
    This work explains te relationships between the final mark of the first and second courses of the Mechanical Engineering degree and Energy Engineering degree with the acces note of the EUETIB. El presente trabajo presenta ...
  • Experimental validation and modelling of electromagnetic kinetic harvester for oceans drifters 

    Toma, Daniel; Jané, Quim; Carbonell Ventura, Montserrat; Massana Hugas, Immaculada; Río Fernandez, Joaquín del (2017)
    Text en actes de congrés
    Accés obert
    Harvesting the mechanical energy of ocean motion are finding different applications for offshore exploration and ocean monitoring. Because of the very low and varying frequency, from 0.1Hz to 2Hz, harvesting this energy ...
  • Enviromental patterns and intermittent cascades 

    Redondo Apraiz, José Manuel; Carrillo Cortés, José Alejandro; Diez Rilova, Margarita; Jorge Sánchez, Juan; Sekula, Emil (2017)
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    Real environmental flows are non-homogeneous, of fundamental interest is to determine and quantify turbulent diffusion from the available conditions of the flow, because the role of buoyancy and rotation modify the flow ...
  • 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)
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    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 ...
  • Overview of the experimental tests in prototype 

    Egusquiza Estévez, Eduard; Valentín Ruiz, David; Presas Batlló, Alexandre; Valero Ferrando, Ma. del Carmen (Institute of Physics (IOP), 2017)
    Text en actes de congrés
    Accés obert
    Experimental tests in prototype are necessary to understand the dynamic behaviour of the machine during different operating points. Hydraulic phenomena as well as its effect on the structure need to be studied in o rder ...
  • 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)
    Text en actes de congrés
    Accés obert
    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 ...
  • 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)
    Text en actes de congrés
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    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 ...

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