Ancillary Services in Hybrid AC/DC Low Voltage Distribution Networks

In the last decade, distribution systems are experiencing a drastic transformation with the advent of new technologies. In fact, distribution networks are no longer passive systems, considering the current integration rates of new agents such as distributed generation, electrical vehicles and energy storage, which are greatly influencing the way these systems are operated. In addition, the intrinsic DC nature of these components, interfaced to the AC system through power electronics converters, is unlocking the possibility for new distribution topologies based on AC/DC networks. This paper analyzes the evolution of AC distribution systems, the advantages of AC/DC hybrid arrangements and the active role that the new distributed agents may play in the upcoming decarbonized paradigm by providing different ancillary services.Ministerio de Economía y Competitividad ENE2017-84813-RUnión Europea (Programa Horizonte 2020) 76409

Presentation

Los artículos incluidos en este número de Cuadernos Geográficos proceden del último Coloquio organizado por el Grupo de trabajo de Historia del Pensamiento Geográfico de la Asociación de Geógrafos Españoles

Métodos de enriquecimiento de glicoproteínas bacterianas para su posterior análisis y caracterización mediante espectrometría de masas

Comunicaciones a congreso

Simulation and comparative analysis of waste in concrete slabs

Construction sector generates significant amounts of waste that affects the environment and obstructs a sustainable development. The horizontal structure (slabs and roofs) is one of the building elements, by its functional requirement (geometry and layout) and volume, who uses more raw material for its constitution (potential generators of waste) On the other hand, the choice of the system to use, is typically based on criteria such as the ease of construction, the economy availability or the technological feasibility; so, from a sustainable perspective, the generation of waste has not been considered or evaluated. This work compares and analyzes four different common elements used in slabs and the possible generation of waste produced for the construction and eventual demolition of them, in order to provide a new weighting criterion in the choice.Peer ReviewedPostprint (published version

Simulation and comparative analysis of waste in concrete slabs

Construction sector generates significant amounts of waste that affects the environment and obsturcts a sustainable development. The horizontal structure (slabs and roofs) is one of the building elements, by its functional requirement (geometry and layout) and volume, who uses more raw material for its constitution (potential generators of waste) On the other hand, the choice of the system to use, is typically based on criteria such as the ease of construction, the economy availability or the tecnological feasibility; so, from a sustainable perspective, the generation of waste has not been considered or evaluated. This work compares and analyzes four different common elements used in slabs and the possible generation of waste produced for the construction and eventual demolition of them, in order to provide a new weighiting criterion in the choice.Peer ReviewedPostprint (published version

El céntimo sanitario ¿Qué coste ha supuesto para el sector del transporte profesional?

La Unión Europea ha criticado el carácter legal del desembolso en concepto de Impuesto sobre las Ventas Minoristas de Determinados Hidrocarburos (IVMDH) que el sector del transporte por carretera viene realizando en los últimos años, particularmente desde el año 2005. El presente artículo indaga en las características legales del IVMDH, también conocido como céntimo sanitario, la recaudación de las Autonomías en este concepto y el coste que ha supuesto para el sector profesional del transporte por carretera, así como el importe que podría ser devuelto a estas empresas dependiendo de su flota de vehículos y de la Autonomía en la que operen

Lettuce Production under Mini-PV Modules Arranged in Patterned Designs

The growing need for clean energy and food production are favoring the use of underused spaces, such as rooftops. This study aims to demonstrate the compatibility of the use of rooftops both for the production of photovoltaic energy and for the production of food, despite the fact that both compete for the same resource, sunlight (rooftop agrivoltaic). In the experiment reported in this study, which was carried out in Almería (Spain) during the spring and summer of 2021, three shade treatments were tested for a lettuce crop, produced by photovoltaic modules with different arrangements: concentrated shade (CS), scattered shade (SS) and full sun (FS). This experiment was repeated in two seasons with high radiation levels and temperature. The results show that in these environmental conditions, the cultivation of plants that demand little sunlight, such as lettuce, is compatible with the shading produced by photovoltaic panels. In addition, it is shown that the same percentage of the area covered with shade (22%), but using mini-PV modules arranged in patterns, improves the productivity (fresh weight, dry matter, number of leaves, maximum length and dry matter of roots) of lettuce cultivation, both in spring and summerinfo:eu-repo/semantics/publishedVersio

A multi functional plug-in for exergames

This paper describes the development of a software complement for Blender (a freely available animation software) which allows to insert motion data obtained from a motion capture camera device. The main target is to provide Blender with a tool to develop exergames, i.e. serious games for performing physical exercises, which are fully adaptive to the user?s needs and capabilities, especially addressing chronical patients or handicapped. The plugin incorporates both: motion control and recording, allowing to store user movements. Transmission is realized via the OSC (Open Sound Control) protocol. The tool is still under development, here a first version is presented showing its functionalities in a demo-game. In the future, sensor data from other devices is planned to be integrated

Imágenes del Paisaje

Los artículos incluidos en este número de Cuadernos Geográficos proceden del último Coloquio organizado por el Grupo de trabajo de Historia del Pensamiento Geográfico de la Asociación de Geógrafos Españoles

Local energy communities modelling and optimisation considering storage, demand configuration and sharing strategies: a case study in Valencia (Spain)

[EN] Local energy communities require tools to select their most fitting community members, power-sharing strategy and technologies for their goals. This work aims to develop a model and a methodology to optimise local energy communities. We evaluate the presence of a battery energy storage system with different capacities and ownership options. Besides, we test two different sharing strategies like static and variable coefficients. Finally, we characterise local energy communities' demand by comparing residential and commercial loads and varying the number of consumption points. We apply the method to a case study consisting of a 100 kWp photovoltaic installation in Valencia simulated with an hourly resolution for a whole year. We use real consumption data from households and commercial buildings and the current administrative requirements, obtaining the flows and status of each component within the local energy community at every moment. We assess each alternative's economic performance, autarchy degree, and the amount of avoided greenhouse gasses emissions. Results indicate that a local energy community well optimised can fulfil economic, environmental or self-consumption goals. Results only advise installing a storage to increase the degree of self-consumption. Moreover, we obtain the best financial and environmental results in large communities with a 75% residential consumption.This is an extended and updated version of a paper originally presented at the 16th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES 2021) held in Dubrovnik, Croatia over the period 10th to 15th October 2021 (denoted then as paper SDEWES2021.00668 Evaluation of the participation of residential and commercial consumers in Energy Communities, a case study in Valencia, Spain). This work was supported in part by the Spanish public administration under grant FPU2016/00962, by the PURPOSED project (ref: PID2021-128822OB-I00), financed by the Spanish State Investigation Agency. And by the Catedra de Transicion Energetica Urbana (Las Naves-VCiE-UPV).Manso-Burgos, Á.; Ribó-Pérez, DG.; Gómez-Navarro, T.; Alcázar-Ortega, M. (2022). Local energy communities modelling and optimisation considering storage, demand configuration and sharing strategies: a case study in Valencia (Spain). Energy Reports. 8:10395-10408. https://doi.org/10.1016/j.egyr.2022.08.1811039510408