Enviaments recents

  • Driving mechanisms and streamwise homogeneity in molecular dynamics simulations of nanochannel flows 

    Bitrian Varea, Vicente; Principe, Ricardo Javier (2018-01-12)
    Article
    Accés obert
    In molecular dynamics simulations, nanochannel flows are usually driven by a constant force, that aims to represent a pressure difference between inlet and outlet, and periodic boundary conditions are applied in the ...
  • Pressure retarded osmosis thermosyphon 

    Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (2018-05-18)
    Article
    Accés restringit per política de l'editorial
    The basis of a novel method for passive solar water heating homologous to the thermosyphon but driven by induced salinity which circulates a fluid without the necessity of a mechanical pump and with inverse natural convection ...
  • Real-time seismic data from the bottom sea 

    Roset Juan, Francesc Xavier; Trullols Farreny, Enric; Artero Delgado, Carola; Prat Farran, Joana d'Arc; Río Fernandez, Joaquín del; Massana Hugas, Immaculada; Carbonell Ventura, Montserrat; Toma, Daniel (Multidisciplinary Digital Publishing Institute (MDPI), 2018-04-08)
    Article
    Accés obert
    An anchored marine seismometer, acquiring real-time seismic data, has been built and tested. The system consists of an underwater seismometer, a surface buoy, and a mooring line that connects them. Inductive communication ...
  • Transmission of high frequency vibrations in rotating systems. Application to cavitation detection in hydraulic turbines 

    Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (Multidisciplinary Digital Publishing Institute, 2018-03-16)
    Article
    Accés obert
    One of the main causes of damage in hydraulic turbines is cavitation. While not all cavitation appearing in a turbine is of a destructive type, erosive cavitation can severely affect the structure, thus increasing maintenance ...
  • Sensor-based optimized control of the full load instability in large hydraulic turbines 

    Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (Multidisciplinary Digital Publishing Institute (MDPI), 2018-03-30)
    Article
    Accés obert
    Hydropower plants are of paramount importance for the integration of intermittent renewable energy sources in the power grid. In order to match the energy generated and consumed, Large hydraulic turbines have to work under ...
  • GPR clutter amplitude processing to detect shallow geological targets 

    Salinas Nadal, Victor; Santos Assunçao, Sonia; Pérez Gracia, María de la Vega (2018-01-01)
    Article
    Accés obert
    The analysis of clutter in A-scans produced by energy randomly scattered in some specific geological structures, provides information about changes in the shallow sedimentary geology. The A-scans are composed by the coherent ...
  • Effect of metal hydride properties in hydrogen absorption through 2D-axisymmetric modeling and experimental testing in storage canisters 

    Busqué Somacarrera, Raquel; Torres Cámara, Ricardo; Grau Barceló, Joan; Roda Serrat, Vicente; Husar, Attila Peter (2017-07-27)
    Article
    Accés obert
    A two-dimensional axisymmetric model is developed to study the hydrogen absorption reaction and resultant mass and heat transport phenomena inside a metal hydride canister. The model is compared against published literature ...
  • Numerical simulations of complex flows in hydraulic turbomachinery. Actual R&D lines in the ‘CFD/Applied Maths Laboratory’ 

    Coussirat Núñez, Miguel Gustavo; Fontanals García, Alfred (2016-07-01)
    Article
    Accés obert
  • 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
    Accés obert
    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 ...
  • FEMPAR: an object-oriented parallel finite element framework 

    Badia, Santiago; Martín Huertas, Alberto Francisco; Principe, Ricardo Javier (2018-04)
    Article
    Accés obert
    FEMPAR is an open source object oriented Fortran200X scientific software library for the high-performance scalable simulation of complex multiphysics problems governed by partial differential equations at large scales, by ...
  • Advanced condition monitoring of Pelton turbines 

    Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Presas Batlló, Alexandre; Valentín Ruiz, David; Bossio, Matias (2018-04)
    Article
    Accés restringit per política de l'editorial
    The ability of hydropower to adapt the electricity generation to the demand is necessary to integrate wind and solar energy into the electrical grid. Nowadays, hydropower turbines are required to work under harsher operating ...
  • 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
    Accés obert
    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 ...

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