Browsing by Keyword "Renewable energy sources"

Now showing 1 - 4 of 4
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    Electric vehicles for renewable energy integration in isolated power systems
    (Institution of Engineering and Technology, 2020-01-01) Wang, Yaofang; Castanõ-Solis, Sandra; Fraile-Ardanuy, Jesús; Jiménez, David; Artaloytia, Benito; Álvaro-Hermana, Roberto; Merino, Julia; Tecnalia Research & Innovation
    The introduction of electric vehicles (EVs) is another alternative to reduce GHG emissions in these isolated systems, because these vehicles are more suitable for the short average daily distances on the islands. EVs can also contribute to integrating renewable energies in these isolated systems, becoming flexible loads and helping to reduce the peak-valley ratio and flattering the energy demand curve. Additionally, the mobility characteristics in islands make them appropriate to promote the electrification of the transportation sector. Introducing V2G as an energy storage system presents advantages such as making use of large-scale distributed storage systems; the batteries of EVs present very low cost for grid operators, easy implementation, and compatibility with the environmental policy. In this work the option of charging an EV fleet as a distributed energy storage system to increase the participation of renewable energy in an isolated power system has been presented.
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    Energy & economic assessment of façade-integrated solar thermal systems combined with ultra-low temperature district-heating
    (2020-10) Lumbreras, Mikel; Garay, Roberto; Tecnalia Research & Innovation
    This paper conducts an energy and economic assessment of District Heating (DH) integrated Solar Thermal (ST) systems. An implementation with building-integrated ST collectors coupled to a Low Temperature District Heating (LTDH) system is studied, with special focus on unglazed collectors. ST heat is exploited in the building through direct use, while excess heat is delivered to the network. A novel control strategy for heat flows in the system is proposed. A meta-analysis of several DH configurations, interconnection schemes and installed ST capacity is performed in three different climates: Sevilla (Spain), Bordeaux (France) & Copenhagen (Denmark). Heat loads corresponding to buildings with various insulation levels and domestic hot water loads are assessed in hourly simulations. The proposed interconnection concept provides a variety of connection modes to the DH network, allowing up to a 50% increase in the provision of solar heat compared to an isolated ST system. Positive Return of Investment (ROI) for such a setup is achieved in 22% of the studied cases. The DH network is found to be a suitable heat sink in up to 25% of the buildings with ST systems installed.
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    Exploring Institutional and Socio-Economic Settings for the Development of Energy Communities in Europe
    (2022-02-21) Sciullo, Alessandro; Gilcrease, Gregory Winston; Perugini, Mario; Padovan, Dario; Curli, Barbara; Gregg, Jay Sterling; Arrobbio, Osman; Meynaerts, Erika; Delvaux, Sarah; Polo-Alvarez, Lucia; Candelise, Chiara; van der Waal, Esther; van der Windt, Henny; Hubert, Wit; Ivask, Nele; Muiste, Marek; Tecnalia Research & Innovation; Policies for Innovation and Technology
    Energy communities (ECs), intended as collective action initiatives in the energy field involving citizens’ participation, have been gaining relevance for the past decades as an alternative way to organize the energy chain to challenge the incumbent system. With Europe’s recently adopted Clean Energy Package, ECs found a formal recognition by the European Union as potential actors of the transition of the energy system towards a wider and more decentralized use of renewable sources. Although the potential role of ECs in the transition is therefore hardly questionable, a thorough comprehension of the enabling factors that might foster their diffusion and scaling up is still lacking. Through a comparative analysis of the evolutionary trajectories in six EU countries regarding their energy systems, their regulatory frameworks and their historical evolution of ECs, namely through the example of cooperative models, this paper aims at providing some preliminary evidence about the factors and dynamics that seem to have played, and may play, a role in hampering or facilitating EC model diffusion. Attention is therefore specifically paid to three dimensions of analysis referring to: the energy mix and market structure; the institutional and policy landscape; the wider social attitudes towards environmental issues and cooperation among citizens. In addition to providing a wide comparison of different EU countries, the paper shows that the historical evolution pathways have to be carefully taken into account to understand what might trigger ECs exploitation in the EU.
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    Installation, operation and maintenance of offshore renewables
    (Institution of Engineering and Technology, 2019-01-01) Nava, Vincenzo; Ruiz-Minguela, Pablo; Pérez-Morán, Germán; Rodríguez-Arias, Raúl; Lopez-Mendia, Joseba; Villate-Martínez, José Luis; RENOVABLES OFFSHORE; Tecnalia Research & Innovation; GENERAL
    The chapter deals with the basic concepts of installation, operation and maintenance of offshore renewable energy systems. Whilst focus is given to the offshore wind industry, the extension to ocean energy (wave and tidal) offers a wider perspective on the major issues concerning the installation and maintenance. A reliability-based approach has been adopted for the analysis of the failures, providing an overview about the most common functional decomposition methodologies as well as logistic requirements for the different operations at the various stages of the lifetime of an offshore renewable project. The economic modelling of the operations, based on strategies for their planning, briefly completes the chapter.