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  • Effects of the pre-processing algorithms in fault diagnosis of wind turbines 

    Marti Puig, Pere; Blanco Martínez, Alejandro; Cárdenas Araujo, Juan José; Cusidó Roura, Jordi; Sole Casals, Jordi (Elsevier, 2018-12)
    Article
    Open Access
    The wind sectors pends roughly 2200M€ in repair the wind turbines failures. These failures do not contribute to the goal of reducing greenhouse gases emissions. The 25–35% of the generation costs are operation and maintenance ...

  • Wind fleet generator fault detection via SCADA alarms and autoencoders 

    Beretta, Mattia; Cárdenas Araujo, Juan José; Koch, Cosmin; Cusidó Roura, Jordi (Multidisciplinary Digital Publishing Institute, 2020-12)
    Article
    Open Access
    A hybrid health monitoring system for wind turbine generators is introduced. The novelty of this research consists in approaching a 115-wind turbine fleet by using the fusion of multiple sources of information. Analog SCADA ...

  • Mantenimiento predictivo de aerogeneradores a partir de datos de datos SCADA 

    Cusidó Roura, Jordi (2019-06)
    Article
    Open Access
    El mantenimiento predictivo en aerogeneradores es un valor en alza. La extensión de vida es una tendencia clara del sector en la que ya están trabajando operadores como Acciona, Naturgy e Innogy, y ello requiere de un ...

  • Feature Selection Algorithms for Wind Turbine Failure Prediction 

    Marti Puig, Pere; Blanco Martínez, Alejandro; Cárdenas Araujo, Juan José; Cusidó Roura, Jordi; Sole Casals, Jordi (2019-01-31)
    Article
    Open Access
    It is well known that each year the wind sector has profit losses due to wind turbine failures and operation and maintenance costs. Therefore, operations related to these actions are crucial for wind farm operators and ...

  • Characterization of ultrafine particles generated in charcoal street grills in the city of Armenia (Colombia). Case study 

    Gómez, Milena E.; Villamizar Vargas, Rafael Humberto; Cremades Oliver, Lázaro Vicente (Universidad de Ciencias Aplicadas Y Ambientales - UDCA, 2020-10-15)
    Article
    Open Access
    In Colombia, it is very common to find informal street grills selling charcoal-roasted foods such as “arepas” (corn tortillas), meats, bananas, corn, etc. This informal economy represents the livelihood of many families. ...

  • Lithium-ion battery 2nd life used as a stationary energy storage system: Ageing and economic analysis in two real cases 

    Rallo Tolós, Héctor; Canals Casals, Lluc; De la Torre, David; Reinhardt, Robert; Marchante, Carlos; Amante García, Beatriz (2020-11-01)
    Article
    Restricted access - publisher's policy
    Electric vehicles (EVs) are considered a viable alternative to internal combustion engine vehicles (ICEVs) and as a result of recent advances in battery technologies, sales are increasing year by year. However, recycling ...

  • A review of gas-surface interaction models for orbital aerodynamics applications 

    Livadiotti, Sabrina; Crisp, Nicholas H.; Roberts, Peter C.E; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2020-11)
    Article
    Restricted access - publisher's policy
    Renewed interest in Very Low Earth Orbits (VLEO) - i.e. altitudes below 450 km - has led to an increased demand for accurate environment characterisation and aerodynamic force prediction. While the former requires knowledge ...

  • In-orbit aerodynamic coefficient measurements using SOAR (Satellite for Orbital Aerodynamics Research) 

    Crisp, Nicholas H.; Roberts, Peter C.E; Livadiotti, Sabrina; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2021-03)
    Article
    Restricted access - publisher's policy
    The Satellite for Orbital Aerodynamics Research (SOAR) is a CubeSat mission, due to be launched in 2021, to investigate the interaction between different materials and the atmospheric flow regime in very low Earth orbits ...

  • Creating business models for smart cities: a practical framework 

    Timeus, Krista; Vinaixa, Jordi; Pardo Bosch, Francesc (2020-05-03)
    Article
    Open Access
    Smart cities can use business models to evaluate what value they offer citizens byintegrating ICT into their infrastructure and services. The article introduces the concept of the ‘city business model’ and proposes a ...

  • Enhancing occupants' comfort through BIM-based probabilistic approach 

    Alavi, Seyedhamidreza; Forcada Matheu, Núria; Bortolini, Rafaela; Edwards, David J. (2021-03)
    Article
    Restricted access - publisher's policy
    Despite the fact that buildings are designed to meet occupants’ needs, many do not perform as planned, impacting upon both building performance and occupants’ comfort. Analyzing occupants’ comfort based on questionnaire ...

  • 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 ...

  • Characterization tests for predicting the mechanical performance of SFRC floors: design considerations 

    Martinelli, Paolo; Colombo, Matteo; Fuente Antequera, Albert de la; Pialarissi Cavalaro, Sergio Henrique; Pujadas Álvarez, Pablo; Di Prisco, Claudio (2021-02)
    Article
    Open Access
    The paper presents an experimental program carried out to check the load bearing capacity of a steel fibre reinforced concrete (SFRC) floor in northern Italy. The extensive mechanical characterization focused on the ...

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