Recent Submissions

  • Along-the-path exponential integration for Floquet stability analysis of wind turbines 

    Ros Ganuza, Javier Upna Orcid; Olcoz Alonso, Álvaro; Plaza Puértolas, Aitor Upna Orcid (IOP Publishing, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Traditionally, stability assessment of wind turbines has been performed by eigenanalysis of the azimuthally-averaged linearized system after applying the Multi-Blade Coordinate (MBC) transformation. However, due to ...
  • Mechanical sensitivity analysis of strain gauge configurations in the main shaft of wind turbines 

    Bacaicoa Díaz, Julen Upna Orcid; Iriarte Goñi, Xabier Upna Orcid; Aginaga García, Jokin Upna Orcid; Plaza Puértolas, Aitor Upna Orcid (IOP Publishing, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Wind turbines are reaching their remaining useful life, thus it is important to guarantee the well status of its components. A common way to check the status is to measure the loads on the Low Speed Shaft with strain gauges, ...
  • Lithium-ion battery model and experimental validation 

    Berrueta Irigoyen, Alberto Upna Orcid; Irigaray, Víctor; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    A simple battery model is useful for: Sizing of the storage system for a particular application; Designing other elements connected to the battery; Managing the storage system operation. This poster consists on: Tests to ...
  • Hydrogen-lithium energy storage for a stand-alone microgrid 

    Berrueta Irigoyen, Alberto Upna Orcid; San Martín Biurrun, Idoia Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Sizing of the storage system for a stand-alone application: Satisfaction of technical requirements; Based on real data from an experimental microgrid; Long lifetime; Lowest price
  • Compensation of forecast error in large PV plants with battery storage: associated strategies 

    Marcos Álvarez, Javier Upna Orcid; Parra Laita, Íñigo de la Upna Orcid; Muñoz Escribano, Mikel Upna; García Solano, Miguel Upna Orcid; Marroyo Palomo, Luis Upna Orcid (2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    As penetration rates of utility-scale photovoltaics (PV) increases, large PV plants will participate in the daily wholesale electricity market in the same way that wind farms. Then, PV plant owner can receive some kind of ...
  • Distributed opportunistic wireless mapping system towards smart city service provision 

    Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid; López Martín, Antonio Upna Orcid; Astrain Escola, José Javier Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The knowledge of wireless signal distribution within an urban scenario can provide useful information to users as well as to enhance connectivity and device operation or to perform municipal logistics based on crowd density ...
  • The promising combination of thermoelectric generators with IoT technologies for autonomous monitoring systems 

    Garacochea Sáenz, Amaia; Catalán Ros, Leyre Upna Orcid; Casi Satrústegui, Álvaro Upna Orcid; Gubía Villabona, Eugenio Upna Orcid; Astrain Ulibarrena, David Upna Orcid (2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Monitoring stations becomes essential in any volcanic system in the world but, because of their remote location, both the electricity supply and the communications represent a technological challenge. The present work ...
  • Geothermal thermoelectric generator for Timanfaya National Park 

    Catalán Ros, Leyre Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid; Araiz Vega, Miguel Upna Orcid (2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Despite being one of the largest renewable sources, geothermal energy is not widely utilized for electricity generation. In the case of shallow Hot Dry Rock (HDR) fields, thermoelectric generators can entail a sustainable ...
  • Study of the degradation of heat exchanger materials in the acidic environment of Teide National Park 

    Catalán Ros, Leyre Upna Orcid; Pérez Artieda, Miren Gurutze Upna Orcid; Berlanga Labari, Carlos Upna Orcid; Garacochea Sáenz, Amaia; Rodríguez García, Antonio Upna Orcid; Domínguez, Vidal; Montañez, Ana Carolina; Padilla, Germán D.; Pérez, Nemesio M. (2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Supplying power to volcanic monitoring stations constitutes a challenge due to both the access difficulties and the acidic environment associated with volcanoes. ELECTROVOLCAN project is developing thermoelectric generators ...
  • Ramp-rate control in large PV plants: battery vs. short-term forecast 

    Marcos Álvarez, Javier Upna Orcid; Parra Laita, Íñigo de la Upna Orcid; Cires Buey, Eulalia; Wang, Guang Chao; García Solano, Miguel Upna Orcid; Marroyo Palomo, Luis Upna Orcid (2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The changeability in the power produced by utility-scale PV plants caused by shadows due to passing clouds can compromise grid stability. Traditionally, some kind of energy storage systems (ESS) is proposed as the solution ...
  • On the calculation of the STC power of PV generators by using typical monitoring system data 

    Muñoz Escribano, Mikel Upna; Parra Laita, Íñigo de la Upna Orcid; García Solano, Miguel Upna Orcid; Marcos Álvarez, Javier Upna Orcid; Marroyo Palomo, Luis Upna Orcid (2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The properly in-field characterization of the power at Standard Test Conditions, PSTC, of PV generators is becoming increasingly important in order to evaluate their performance and its evolution in time. Within the state ...
  • A tool for the performance evaluation and failure detection of Amareleja PV plant (Acciona) from SCADA 

    Muñoz Escribano, Mikel Upna; Parra Laita, Íñigo de la Upna Orcid; García Solano, Miguel Upna Orcid; Marcos Álvarez, Javier Upna Orcid; Pérez, Miguel (2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This paper describes a tool developed for the performance evaluation and failure detection in a 45.6 MWp PV plant installed by the company Acciona in Amareleja (Portugal). The paper describes the PV plant configuration and ...
  • PV power forecasting using a parametric model 

    Muñoz Escribano, Mikel Upna; Parra Laita, Íñigo de la Upna Orcid; García Solano, Miguel Upna Orcid; Marcos Álvarez, Javier Upna Orcid (2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Nowadays, accurate AC power output forecast of PV plants can play a significant role for both the system operators and PV plant owners. The first group has to program the dispatch of the electric system and the second one ...
  • A comparative study of degradation and performance of thin film photovoltaic generators versus a multi-crystalline generator 

    Parra Laita, Íñigo de la Upna Orcid; García Solano, Miguel Upna Orcid; Marcos Álvarez, Javier Upna Orcid; Marroyo Palomo, Luis Upna Orcid (2013)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Thin film solar cells (TFSC) are supposed to have higher energy yield rates than crystalline silicon (Si-x) mainly possible by some enhancements like lower temperature coefficient and higher absorption of diffuse light. ...
  • A novel camera phone-based platform for Sol-Gel-derived fluorescence pH sensing 

    Urrutia Azcona, Aitor Upna Orcid; Wencel, D.; O’Driscoll, S.; O’Reilly, B.; Abel, T.; Somers, M.; Rivero Fuente, Pedro J. Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; McDonagh, C. (2013)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work a novel camera phone system for fluorescence-based sol-gel-derived pH sensing is presented. The sol-gel based pH material, a microfluidic chip and a camera phone have been combined to obtain a fluorescence-based ...
  • On the convergence of a modal updating iterative method applied to a vibrating table for food transportation 

    Iriarte Goñi, Xabier Upna Orcid; Ros Ganuza, Javier Upna Orcid (2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This work focuses on the updating of the parameters of a Vibrating Table Multibody model. Modal Analysis has been done to obtain the experimental Modal Parameters of the System (natural frequencies (ωi), damping ratios ...
  • Optical sensor based on polymer electrospun nanofibers for sensing humidity 

    Urrutia Azcona, Aitor Upna Orcid; Rivero Fuente, Pedro J. Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (2011)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    A novel humidity sensor based on polymer electrospun nanofibers coating onto an optical fiber is proposed in this work. The coating is composed of poly(acrylic acid), and its fabrication was performed by the electrospinning ...
  • Humidity sensor based on a long-period fiber grating coated with a hydrophobic thin film 

    Urrutia Azcona, Aitor Upna Orcid; Rivero Fuente, Pedro J. Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (2010)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work it is proposed a novel fiber optic humidity sensor based on a functionally coated long-period fiber grating (LPG). The coating is composed of tetraorthosilicate matrix functionalized with perfluorooctyltriethoxysilane ...
  • An antibacterial surface coating composed of PAH/SiO2 nanostructurated films by Layer by Layer 

    Urrutia Azcona, Aitor Upna Orcid; Rivero Fuente, Pedro J. Upna Orcid; Ruete Ibarrola, Leyre; Goicoechea Fernández, Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (2009)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this article we propose a novel antibacterial coating composed of SiO2 and the polymer Poly(allylamine hydrochloride) (PAH) on glass slides by the technique Layer-by- Layer (LbL)1. This technique has already used in ...
  • A scalable and flexible Open Source Big Data architecture for small and medium-sized enterprises 

    Iñiguez Jiménez, Luis; Galar Idoate, Mikel Upna Orcid (Springer, 2021)   Contribución a congreso / Biltzarrerako ekarpena
    The advancements of Big Data, Internet of Things and Artificial Intelligence are causing the industrial revolution known as Industry 4.0. For automated factories, adopting the necessary technologies for its implementation ...

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