Zerrendatu honen arabera: egilea "331dd1b7d96a0a94274cf3daf2d1bdfd"
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Assessing heavy maintenance alternatives for floating offshore wind farms: Towing vs. onsite replacement strategies
Centeno-Telleria, Manu; Penalba, Markel (Elsevier, 2025)This paper presents the first comparative study evaluating towing and onsite replacement strategies for heavy maintenance of floating offshore wind (FOW) turbines. The towing maintenance strategy is characterised by a ... -
Assessing the statistical validity of momentum-deficit-based measurements in turbulent configurations
Zarketa-Astigarraga, Ander; Martin-Mayor, Alain; Martinez Agirre, Manex; Penalba, Markel (Elsevier Ltd., 2021)An application-agnostic procedure is outlined for checking the validity of momentum-deficit-based drag measurements performed under different turbulent conditions in a wind tunnel. The approach defines a two-step methodology: ... -
Bemrosetta: An open-source hydrodynamic coefficients converter and viewer integrated with Nemoh and Foamm
Penalba, Markel (EWTEC, 2021)Boundary Element Method (BEM) solvers are extensively used to obtain the hydrodynamic coefficients required to model hydrodynamic forces in oating marine structures. BEM solvers require the discretization of the submerged ... -
Benchmarking of spectral methods for fatigue assessment of mooring systems and dynamic cables in offshore renewable energy technologies
Martinez-Puente, Eguzkiñe; Zarketa-Astigarraga, Ander; Martinez Agirre, Manex; Zabala, Alaitz; Esnaola, Jon Ander; Llavori, Inigo; Penalba, Markel (Elsevier, 2024)Fatigue life estimation methods based on time-domain and rainflow counting techniques are widely recognised and accepted for their reliability. However, applying them in scenarios involving random loads with multiple ... -
Building an Air Turbine Conditional Anomaly Detection Approach for Wave Power Plants
Aizpurua Unanue, Jose Ignacio; Penalba, Markel; Kirillova , Natalia; Alcorta Andoaga, Illart (2021)The Mutriku Wave Power Plant (WPP) is a wave energy conversion plant based on the oscillating water column technology (OWC). The energy production and the health state of the plant are directly dependent on the sea-state ... -
Code-to-code nonlinear hydrodynamic modelling verification for wave energy converters: Wec-sim vs. nlfk4all
Penalba, Markel (EWTEC, 2021)In the wave energy conversion field, simulation tools are crucial for effective converter and controller design, but are often prone to become very casespecific, in both structure and parameter selection. This is due to ... -
Context-informed conditional anomaly detection approach for wave power plants: The case of air turbines
Aizpurua Unanue, Jose Ignacio; Penalba, Markel; Kirillova, Natalia (Elsevier, 2022)The reliability and energy production of wave power plants (WPPs) depend on sea-state conditions, operation efficiency and degradation of its constituent assets. Air turbines are key assets for the efficient and reliable ... -
A data-driven long-term metocean data forecasting approach for the design of marine renewable energy systems
Penalba, Markel; Aizpurua Unanue, Jose Ignacio (Elsevier, 2022)The potential of Marine Renewable Energy (MRE) systems is usually evaluated based on recent metocean data and assuming the stationarity of the MRE resource. Yet, different studies in the literature have shown long-term ... -
Effect of liner thermal properties and liner pre-cooling on the thermal management of fast-filling of hydrogen tanks
Blanco-Aguilera, Ricardo; Martinez Agirre, Manex; Berasategi Arostegi, Joanes; Penalba, Markel; Bou-Ali, M. Mounir; Shevtsova, Valentina (Elsevier, 2024)In transportation applications, filling high pressurised hydrogen tanks within a few minutes implies a fast and large temperature increase that can compromise the structural integrity of the storage system and the safety ... -
Evolution of the European offshore renewable energy resource under multiple climate change scenarios and forecasting horizons via CMIP6
Penalba, Markel; Zarketa-Astigarraga, Ander (Elsevier, 2024)The design of the different offshore renewable energy (ORE) technologies depends on the characteristics of wind/wave resources. However, these characteristics are not stationary under climate change. In this study the ... -
Experimental assessment of scale-effects on the aerodynamic characterization of a transitionally-operating airfoil working under clean flow conditions
Zarketa-Astigarraga, Ander; Penalba, Markel; Martin-Mayor, Alain; Martinez Agirre, Manex (Elsevier, 2022)Wind tunnel tests are carried out upon a NACA0021 airfoil subjected to transitional Reynolds numbers. Transitionally-operating airfoils show a high sensitivity to external conditions and pose relevant measurement issues ... -
A holistic optimization tool for the design of power take-off systems in realistic wave climates: The Wells turbine case
Zarketa-Astigarraga, Ander; Martin-Mayor, Alain; Martinez Agirre, Manex; Penalba, Markel (Elsevier, 2023)The growing demand of energy coupled with the worldwide commitments in favor of renewable technologies turns marine renewable sources especially attractive, including wave energy. In particular, the oscillating water column ... -
Impact of long-term resource variations on wave energy Farms: The Icelandic case
Penalba, Markel (Elsevier, 2020)Four decades (between 1979 and 2018) of the wave energy resource around Iceland are analysed in the present paper via the ERA5 reanalysis, the newest reanalysis of the European Centre for Medium-Range Weather Forecasts. ... -
Impact of turbulence and blade surface degradation on the annual energy production of small-scale wind turbines
Zarketa-Astigarraga, Ander; Penalba, Markel; Martin-Mayor, Alain; Martinez Agirre, Manex (Wiley, 2023)Small-scale horizontal axis wind-turbines (SHAWTs) are acquiring relevance withinthe regulatory policies of the wind sector aiming at net-zero emissions, while reduc-ing visual and environmental impact by means of distributed ... -
Industria eolikoko palen efizientzia aerodinamikoaren azterketa esperimentala baldintza ideal eta errealetan
Zarketa-Astigarraga, Ander; Penalba, Markel; Martin-Mayor, Alain; Martinez Agirre, Manex (UEU, 2021)The paradigm of renewable energies brings a number of challenges to be solved in a short-term period. In the case of wind energy, it turns necessary to relocate onshore wind-farms in both offshore coastal regions and urban ... -
Molinos de viento patentados por Jerónimo de Ayanz y Beaumont en el año 1606: un análisis conceptual desde una perspectiva ingenieril del año 2021
Abad, Gonzalo; Penalba, Markel; Zarketa-Astigarraga, Ander (Mondragon Unibertsitatea, 2021)En el presente documento técnico, se realiza un análisis desde un punto de vista ingenieril de los molinos de viento patentados por Jerónimo de Ayanz y Beaumont el siglo XVII. El análisis que se presenta podría denominarse ... -
O&M-aware techno-economic assessment for floating offshore wind farms: A geospatial evaluation off the North Sea and the Iberian Peninsula
Centeno-Telleria, Manu; Aizpurua Unanue, Jose Ignacio; Penalba, Markel (Elsevier, 2024)The development of accurate techno-economic models is crucial to boost the commercialisation of floating offshore wind farms. However, conventional techno-economic models oversimplify operation and maintenance (O&M) aspects, ... -
On the Definition of a Comprehensive Technology-Informed Accessibility Metric for Offshore Renewable Energy Site Selection
Centeno-Telleria, Manu; Zarketa-Astigarraga, Ander; Aizpurua Unanue, Jose Ignacio; Penalba, Markel (MDPI, 2023)Despite the important role of offshore renewable energies (OREs) in the energy transition, the economical viability is still unclear. Therefore, an appropriate site selection is crucial. Besides the energy potential, the ... -
On the definition of a risk index based on long-term metocean data to assist in the design of Marine Renewable Energy systems
Penalba, Markel; Aizpurua Unanue, Jose Ignacio (Elsevier Ltd, 2021)Marine Renewable Energy (MRE) systems are designed to maximise energy generation and ensure survivability. The traditional design process is based on pure environmental conditions, tends to be too conservative and limits ... -
On the impact of long-term wave trends on the geometry optimisation of oscillating water column wave energy converters
Penalba, Markel (Elsevier Ltd., 2020)Wave trends have been shown to be relevant to energy generation in various areas of the world. Accordingly, this article describes the impact of wave trends on the design of oscillating water column wave energy converters. ...
