Now showing items 1-20 of 92

    • A dataset to evaluate IEEE 802.15.4g sun for dependable low-power wireless communications in industrial scenarios 

      Tuset Peiro, Pere; Cuerva Contreras, Eva; Egusquiza Estévez, Eduard; Vilajosana Guillén, Xavier (2020-09-01)
      Article
      Open Access
      This article presents a dataset obtained from the deployment of an IEEE 802.15.4g SUN (Smart Utility Network) single-hop network (11 nodes) in a large industrial scenario (110,044 m 2 ) for a long period of time (99 days). ...
    • A novel condition monitoring methodology based on neural network of pump-turbines with extended operating range 

      Zhao, Weiqiang; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Valentín Ruiz, David; Presas Batlló, Alexandre (2019)
      Conference report
      Open Access
      Due to the entrance of new renewable energies, water-storage energy has to be regulated more frequently to keep the stability of power grid. Consequently, pump-turbines have to work under offdesign conditions more than ...
    • A review of dynamic models and stability analysis for a hydro-turbine governing system 

      Xu, Beibei; Zhang, Zhongzhi; Egusquiza Montagut, Mònica; Chen, Diyi; Li, F.; Behrens, Paul; Egusquiza Estévez, Eduard (2021-07)
      Article
      Restricted access - publisher's policy
      Hydropower offers highly flexible, low-carbon generation that can be used to balance electricity grids with high levels of wind and solar penetration. This will become increasingly important as the energy transition unfolds. ...
    • 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 ...
    • 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 ...
    • 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
      Open Access
      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 ...
    • Analysis if the dynamic response of pump-turbine runners- Part I: Experiment 

      Presas Batlló, Alexandre; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard; Huang, Xingxing; Farhat, Mohamed; Avellan, François (2012)
      Conference report
      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 ...
    • Analysis of chatter marks damage on the Yankee dryer surface of a tissue machine 

      Escaler Puigoriol, Francesc Xavier; Torre Rodríguez, Óscar de la; Egusquiza Estévez, Eduard (Elsevier, 2012-03-08)
      Article
      Restricted access - publisher's policy
      A tissue machine suffering from Yankee chatter marks has been experimentally investigated. A series of vibration measurements during normal operation at various Yankee speeds on both the creping and the cleaning blade ...
    • Analysis of damage caused by siloxanes in stationary reciprocating internal combustion engines operating with landfill gas 

      Álvarez Flórez, Jesús Andrés; Egusquiza Estévez, Eduard (Elsevier, 2015-02-04)
      Article
      Open Access
      Failures in reciprocating internal combustion engines operating with landfill gas are not uncommon. In general, damage is located in the combustion chamber surfaces and in the ring grooves, where a layer of non-volatile ...
    • Analysis of the dynamic response of pump-turbine impellers. Influence of the rotor 

      Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Presas Batlló, Alexandre; Huang, Xingxing; Guardo Zabaleta, Alfredo de Jesús; Seidel, Ulrich (2016-02-01)
      Article
      Open Access
      This paper deals with the dynamic response of pump-turbine impellers. A pump-turbine impeller is a complex structure attached to a rotor and rotating inside a casing full of water with very small clearances between the ...
    • 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 ...
    • Análisis de las vibraciones y fluctuaciones de presión en una bomba turbina 

      Egusquiza Estévez, Eduard; Boldy, Adrian (1992-03)
      Article
      Restricted access - publisher's policy
      En este artículo se describe el análisis de las mediciones de presión no estacionaria y vibraciones en una bomba-turbina a fin de identificar el origen de las vibraciones en una estructura próxima a la central. Una excitación ...
    • Assessment of the economic and environmental impact of double glazed façade ventilation systems in Mediterranean climates 

      Valentín Ruiz, David; Guardo Zabaleta, Alfredo de Jesús; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Alavedra, Pere (2013-09-30)
      Article
      Open Access
      Free convection is the most often used method in order to reduce solar load gains on a building with double glazed façades (DGFs). However, depending on the climate factors, the thermal performance of a DGF may not be ...
    • Behavior of Francis turbines at part load. Field assessment in prototype: Effects on power swing. 

      Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (Institute of Physics (IOP), 2019)
      Conference report
      Open Access
      Francis turbines are increasingly demanded to work at part load in order to satisfy the electricity generation demand and to compensate the non-constant generation of other renewable sources such as wind or solar. At part ...
    • Behavior of Francis turbines at part load. Field assessment in prototype: Effects on the hydraulic system. 

      Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard (Institute of Physics (IOP), 2019)
      Conference report
      Open Access
      At present, hydropower plants play an important role because of their flexibility in the generation of electricity. Today, the required operating range of turbine units is expected to extend to deep part load. At part load ...
    • Boundary layer effects on the vortex shedding in a Donaldsontype hydrofoil 

      Fontanals García, Alfred; Guardo Zabaleta, Alfredo de Jesús; Zobeiri, Amirreza; Egusquiza Estévez, Eduard; Farhat, Mohamed; Avellan, François (2014)
      Conference lecture
      Open Access
      Fluid - Structure Interaction (FSI) phenomena is becoming a relevant study field for the design or revamping of hydropower plants. The generalized trend of increasing flow rates and reducing rotor blades/stay vanes thickness ...
    • Capability of structural-acoustical FSI numerical model to predict natural frequencies of submerged structures with nearby rigid surfaces 

      Rodríguez, Cristian; Flores, P.; Pierart, F.G.; Contzen, L.R.; Egusquiza Estévez, Eduard (2012-07-01)
      Article
      Restricted access - publisher's policy
      Structural–acoustical model is used in industry to determine natural frequencies of runners and impellers in hydraulic turbomachinery in the stage of design. In these calculations the fluid domain is considered with ...
    • CFD study of the effects of ingested bodies on the RSI of hydraulic turbines 

      Guardo Zabaleta, Alfredo de Jesús; Fontanals García, Alfred; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (2018)
      Conference report
      Open Access
      The ingestion of large bodies in hydraulic turbines can produce blockage in the runner and/or the distributor, modifying the amplitude and uniformity of pressure pulsations and generating large ...
    • Characterization of the effects of ingested bodies on the rotor–stator interaction of hydraulic turbines 

      Guardo Zabaleta, Alfredo de Jesús; Fontanals García, Alfred; Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (2021-10-14)
      Article
      Open Access
      Runner and distributor blockages in hydraulic turbines occur due to the ingestion of external bodies such as rocks or logs. These obstructions can change the amplitude and uniformity of the pressure pulsations in the ...
    • Comportament dinàmic de màquines hidràuliques 

      Egusquiza Estévez, Eduard (Edicions UPC, 2003)
      Book
      Restricted access to the UPC academic community
      Aquest llibre fa una anàlisi completa del comportament dinàmic/vibratori de màquines hidràuliques, des de les forces excitadores que actuen sobre la màquina fins a les vibracions finals generades. Està destinat tant a ...