ER - Artigos em revistas internacionais
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Browsing ER - Artigos em revistas internacionais by Field of Science and Technology (FOS) "Engenharia e Tecnologia::Outras Engenharias e Tecnologias"
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- Foresighting Scenarios for Green Hydrogen in Portugal: Systematization of Potential Futures and Identification of Bottlenecks and ConstraintsPublication . Vieira, Mário; Alves, Marco; Simoes, Sofia; Quental, Lídia; Catarino, Justina; Ribeiro Pinto, Paulo Jorge; Oliveira, Paula; Simões, TeresaABSTRACT: The use of green hydrogen has emerged as a promising avenue for facilitating the decarbonization of society. In this study, the potential futures of green hydrogen in Portugal, a key player in Europe's energy transition, are explored. Utilizing General Morphological Analysis combined with advanced clustering, the various political, social, and technological elements are analyzed to create a multifaceted view of the sector's future. This results in seven distinct scenario clusters, each offering unique insights into the challenges and opportunities for green hydrogen. The scenarios span a range of outcomes, from rapid growth fueled by strong policy support and technological advancements to more measured development due to economic or infrastructural hurdles. This study intends to provide stakeholders a deep understanding of the factors influencing green hydrogen's role in Portugal's push towards a sustainable energy landscape by 2030. These results provide a basis for the development of new projects and research directions, providing them with the necessary knowledge to make informed decisions. Moreover, this study will contribute to decision support by facilitating actions aimed at fostering the appropriate development of green hydrogen.
- Techno-economic analysis of a novel hybrid wind-wave floating platform concept: The OctaPlatPublication . Rodrigues, M.B.V.A.; Portillo, Juan C. C.; Henriques, João; Gato, Luís; Mendonça, Nuno P.ABSTRACT: This work focuses on the techno-economic analysis of a novel floating offshore hybrid wind-wave platform. Floating multi-purpose platforms can potentially reduce costs associated with floating offshore wind. This work is based on the OctaPlat, a barge-type hybrid wind-wave floating platform designed at Instituto Superior Técnico, University of Lisbon. The paper presents the concept and numerical model of the floating wave platform, comprising five oscillating water column (OWC) wave energy converters, which was implemented in the object-oriented non-causal Modelica language. The OctaPlat configuration investigated here was equipped with the 15 MW IEA reference wind turbine, whose power output was computed using OpenFAST©. A sensitivity analysis of the geometry was performed, and the best performer design reached an average annual wave turbine power of 2.5 MW and a total wind-wave power of about 10.75 MW for a selected site off the west coast of Portugal. The levelized cost of energy (LCOE) was determined for a farm in the selected location. Various scenarios were assessed, and a Monte Carlo approach resulted in a probable value of LCOE of 135 €/MWh, with LCOE P90 and LCOE P10 values of 99 and 180 €/MWh, respectively. Experimental tests of the wave energy conversion systems were performed on a scale of 1:100, and comparisons with numerical results showed good agreement, with a coefficient of determination (R 2) of approximately 0.94 and relative differences were less than 20%, except for a few peak deviations. These results reveal the potential competitiveness of wind-wave multi-purpose platforms in floating offshore renewable energy projects.