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An Efficient Localized Model Order Reduction Framework for the Shape Optimization of Additively Manufactured Lattice Structures
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Fractional Flow Reserve Prediction Using In-House Computational Methods - Validation With Several Patient Cases
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Modeling Sand Ripples in Mine Countermeasure Simulations by means of Stochastic Optimal Control
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New life for aeronautical dry carbon fiber
No full textOur latest generation aircraft are more efficient by design, lighter and emit on average 25% less CO2 than previous generation aircrafts. Lightweight materials like composites have contributed significantly to reach the current emissions levels, like the A350 with more than 50% of structural weight made of composites. However, composites drive also the environmental footprint of the aircraft life-cycle without considering the operational phase, involving currently important drawbacks in terms of energy consumption and waste recycling. The transition towards a composite circular economy needs to be anticipated due to the aviation sector de-carbonization challenge as well as the regulation evolution. This transition will be leveraged by several elements, being the composite recycling one of the most important, due to the need to transform the composite waste from production and end of life into new added value materials. For this, the development of efficient composite recycling technologies to not only recover energy during incineration but also high value recycled carbon fibers and semi-products are needed. This project was focused on the recycling of dry carbon fiber scrap, which can proceed from part production by infusion technologies (e.g. RTM) or from pyrolysis of end of life composite part. The approach was to obtain a non-woven mat from the dry fiber scrap, following a mechanical process, which was, then, fully characterized to identify potential applications in aeronautical field. Different approaches of hybridization of the recycled non-woven fabric with virgin fabric were also evaluated
Impacto económico de la sequía en Catalunya. Impacto sobre los resultados empresariales
No full textEste documento analiza el impacto de la coyuntura de desabastecimiento de agua desde mayo de 2023 en Catalunya. Como factor determinante para la economía, no solo del sector primario, sino que de cada uno de los sectores que la integran. La actual conyuntura de debastecimiento hidrico que atraviesa Catalunya ya se contabiliza en cientos de millones de euros, inicialmente ha afectado al sector agroalimentario, pero con el paso del tiempo se ha extendido al resto de los sectores del tejido empresarial catalán. Al punto de que actualmente es la principal factor de decrecimiento de las proyecciones del PIB de la comunidad, su no resolución supone un grave problema cuando se acerca el verano, y el debastecimiento de agua puede generar grandes perdidas en el sector de la hostelería en su momento de mayor ocupación del año, sector vital no solo para Catalunya, sino que también para España. Sumado a las afectaciones energéticas producto del estado de los embalses a un 15% de su capacidad, las cuales repercuten en todos los sectorees económicos de la comunidad, al igual, que en las economías domésticas.
En el siguiente paper se realizará un estudio sobre el impacto del debastecimiento de agua calculándo el índice de productividad, coste ponderado de capital, y existencias producidas de una muestra representativa de 20 compañías de los sectores más damnificados, salvo por la hostelería . A partir de la cual se calculará una media de cada una de las tres ratios, evidenciando la perdida de productivad, incremento del coste capital, y la producción de existencias totales aproximándose a una cuantificación ponderada de la crisis hídrica mediante a una comparativa con los resultados encontrados con los del ejercicio económico correspondiente a 2022, antes de la coyuntura. Las empresas que integran el pool sobre el cual se realizará el análisis son: Henkell Freixenet, Raventos Codorníu, Grupo Bonpreu, Casa Taradellas, Damm S.A, Segura Viudas, Frit Ravich, Corporación Alimentaría de Guissona, Grupo Agora, Agroalimen, Costa Food Meat, Europastry, Valls Company, Grupo Agbar, Borges S.A, Nestlé España, Costa Brava Mediterranean Foods, Cobega S.A, Lipsa
A fully distributed algorithm for dynamic economic dispatch of cross regional power systems based on alternating direction multiplier method
No full textIn the present study, a novel approach to dynamic economic dispatch for power systems spanning multiple regions is introduced, utilizing the alternating direction multiplier method (ADMM) as its computational foundation. The proposed economic scheduling model is designed to optimize the operational costs of the system comprehensively, while adhering to a spectrum of operational constraints. Employing the ADMM, the study achieves a distributed resolution of the model by severing the inter-regional interconnections, thereby partitioning the overarching optimization challenge into manageable sub-problems specific to each region. This methodology facilitates the attainment of the system’s global optimum through the iterative resolution of these regional sub-problems. Furthermore, the algorithm obviates the necessity for a centralized data repository for multiplier updates, thereby endorsing a fully distributed scheduling paradigm. Concurrently, the study incorporates a multi-period optimization technique within the economic scheduling model to accommodate the inherent temporal dependencies of the power system. The culmination of this research is the empirical analysis of a tri-regional interconnected system, predicated on the IEEE standard test system, which substantiates the efficacy of the proposed economic dispatch strategy