Recent Submissions

  • Excessive vibrations experienced in a Kaplan turbine at speed no load 

    Moraga González, Greco Alonso; Mut Monfort, Vicent; Girardelo, Jeferson; Mazzouji, Farid; Valentín Ruiz, David; Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard; Presas Batlló, Alexandre (Elsevier, 2024-03)
    Article
    Open Access
    A Kaplan turbine unit from a new powerplant experienced high levels of vibrations and noise during the acceleration of the unit to nominal speed. These levels remained very high at speed no load. A first analysis seemed ...
  • Numerical theory and method on the modal behavior of a pump-turbine rotor system considering gyro-effect and added mass effect 

    Cao, Jingwei; Luo, Yongyao; Liu, Xin; Presas Batlló, Alexandre; Deng, Liwei; Zhao, Weiqiang; Xia, Ming; Wang, Zhengwei (Elsevier, 2024-04-30)
    Article
    Restricted access - publisher's policy
    The pump-turbine unit is the core equipment of pumped storage power station, and the rotor system is the key component of the pump-turbine unit. In this paper, the numerical method considering the gyro-effect and added ...
  • Prediction of the characteristic pressure pulsations in a reversible pump-turbine 

    Fontanals García, Alfred; Guardo Zabaleta, Alfredo de Jesús; Coussirat Núñez, Miguel Gustavo; Moll, Flavio; Egusquiza Estévez, Eduard; Martínez, Germán (2023-11)
    Article
    Open Access
    Reversible Pump- Turbine turbomachines are frequently used in peaking load hydroelectrical power plants. These plants contribute to satisfy the energy demand during peak load periods. Its dynamic behaviour is influenced ...
  • Experimental study on the influence of vibration amplitude on the fluid damping of a submerged disk 

    Moraga González, Greco Alonso; Xia, Xiang; Roig López, Sergi; Valero Ferrando, Ma. del Carmen; Valentín Ruiz, David; Egusquiza Montagut, Mònica; Zhou, Lingjiu; Egusquiza Estévez, Eduard; Presas Batlló, Alexandre (Elsevier, 2023-10)
    Article
    Open Access
    Accurate determination of modal parameters for disk-like structures submerged in heavy fluids is a topic of interest in many fields. For instance, some type of hydraulic turbomachinery can be modelled as disk structures ...
  • Hybridization of a RoR HPP with a BESS—The XFLEX HYDRO Vogelgrun Demonstrator 

    Kadam, Serdar; Hofbauer, Wolfgang; Lais, Stefan; Neuhauser, Magdalena; Wurm, Erich; Fernandes Lameiro, Luisa; Bourien, Yves Marie; Païs, Grégory; Drommi, Jean-Louis; Nicolet, Christophe; Landry, Christian; Dreyer, Matthieu; Valero Ferrando, Ma. del Carmen; Presas Batlló, Alexandre; Valentín Ruiz, David (2023-07-01)
    Article
    Open Access
    In the XFLEX HYDRO Vogelgrun demonstrator, a run-of-river hydropower plant, the hybridization of one turbine-generator unit with a battery energy storage system is being investigated. This paper describes the integration ...
  • Visualization research of energy dissipation in a pump turbine unit during turbine mode's starting up 

    Jin, Faye; Wang, Huanmao; Luo, Yongyao; Presas Batlló, Alexandre; Bi, Huili; Wang, Zhengwei; Lin, Kai; Lei, Xingchun; Yang, Xiaolong (Elsevier, 2023-11-01)
    Article
    Restricted access - confidentiality agreement
    Identifying the precise location of flow energy dissipation (FED) in pump turbines is crucial for enhancing the stability of pumped storage power stations. In this study, the transient process of the turbine mode's starting ...
  • Water saving options in hydropower by means of variable speed operation: a prototype study in a mid-head Francis turbine 

    Presas Batlló, Alexandre; Valero Ferrando, Ma. del Carmen; Valentín Ruiz, David; Egusquiza Montagut, Mònica; Pinto, Pedro Diogo; Gonçalves de Carvalho, Ana; Coronati, Alex; Egusquiza Estévez, Eduard (Elsevier, 2023-06-22)
    Article
    Open Access
    Nowadays, in order to mitigate the global warming effects, there is a need of renewable energy generation for the objective of carbon neutrality. In this context, hydropower plays a key role not only because the amount of ...
  • On the added modal coefficients of a rotating submerged cylinder induced by a whirling motion. Part 1: Experimental investigation 

    Roig Bauzà, Rafel; Sánchez Botello, Xavier; Jou Santacreu, Esteban; Escaler Puigoriol, Francesc Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2023-09-08)
    Article
    Open Access
    The operation of submerged rotating machines, such as marine current or tidal turbines, can present deleterious fluid phenomena that may provoke extreme structural vibrations. To predict their dynamic responses, it is ...
  • Thermal, acoustic, and fire performance characterization of textile face mask waste for use as low-cost building insulation material 

    Neri, Manuela; Cuerva Contreras, Eva; Levi, Elisa; Pujadas Álvarez, Pablo; Müller, Edgardo; Guardo Zabaleta, Alfredo de Jesús (Elsevier, 2023-04)
    Article
    Open Access
    Environmental issues are becoming increasingly important, and researchers are developing new technologies and models to reduce environmental impact. The circular economy is a production and consumption model that involves ...
  • Resonance vibration interventions in the femur: Experimental-numerical modelling approaches 

    Presas Batlló, Alexandre; Valentín Ruiz, David; Deering, Joseph; Grandfield, Kathryn; Mele, Elisa; Heiss, Christian; Bosbach, Wolfram A.; Kampschulte, Marian; Yu, Bosco; Biehl, Christoph; Krombach, Gabriele A. (Elsevier, 2021-12)
    Article
    Restricted access - publisher's policy
    Motive: External vibration excitation might be key to many novel non-surgical interventions for pathologies in the musculoskeletal system and in other parts of the human organism. Lack of understanding about vibration ...
  • Thermal assessment of a ventilated double skin façade component with a set of air filtering photocatalytic slats in the cavity 

    Roig Mayoral, Oriol; Cuerva Contreras, Eva; Pardal March, Cristina; Guardo Zabaleta, Alfredo de Jesús; Isalgué Buxeda, Antonio; López Besora, Judit (2023-01-17)
    Article
    Open Access
    Indoor air quality is a crucial factor when evaluating habitability, especially in developed countries, where people spend most of their time indoors. This paper presents a novel double skin façade (DSF) system that combines ...
  • Time-frequency domain characteristics analysis of a hydro-turbine governor system considering vortex rope excitation 

    Lei, Liuwei; Li, Feng; Xu, Beibei; Egusquiza Montagut, Mònica; Luo, Xingqi; Zhang, Junzhi; Egusquiza Estévez, Eduard; Chen, Diyi; Jiang, Wei; Patelli, Edoardo (2022-01)
    Article
    Open Access
    Understanding and simulating the dynamic characteristics of the hydro-turbine governor system is essential to guarantee the safety of the hydro-power systems. This study proposes a modification method of the water head at ...

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