Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
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The lithium systems of the IFMIF-DONES facility
No full textIFMIF-DONES (International Fusion Materials Irradiation Facility ??? DEMO Oriented Neutron Source) es una infraestructura internacional cuyo prop??sito es generar un flujo de neutrones de alta energ??a e intensidad mediante la interacci??n de un haz de deuterones con un target l??quido de litio. Este flujo simula las condiciones de radiaci??n que sufrir??n los materiales en reactores de fusi??n como DEMO, permitiendo estudiar su rendimiento y durabilidad. El art??culo describe los sistemas de litio dise??ados para la instalaci??n cient??fica IFMIF-DONE
Identificaci??n de los par??metros cr??ticos de la combusti??n de biomasa: etapa de preparaci??n del combustible, proceso de combusti??n y depuraci??n de emisiones
No full textInformes T??cnicos CIEMAT;1467Abstract: Critical parameters with influence in biomass combustion, associated to the
different stages of the process: biomass pretreatment, combustion process and emissions
depuration, are identified in this report.
Regarding parameters associated to biomass and its pretreatment, biomass availability and
physic-chemical characterization (chemical composition, moisture content, particle size
distribution and density) could be remarked. From the point of view of the combustion
process, the type of furnace, the design parameters and the adjustments of operating
parameters could be highlighted. Finally, the utilization of depuration systems in exhaust
gases for eliminating particles is essential. The most recommended devices are lectrostatic
precipitators and bag filters, due to their high efficiency.
In this document, several practical cases are included, where the influence of these parameters on emissions and efficiency of the combustion process is shown.En este informe se identifican los par??metros cr??ticos que pueden influir en la
combusti??n de biomasa, asociados a las distintas etapas del proceso: preparaci??n del
combustible, proceso de combusti??n y depuraci??n de emisiones.
As??, en cuanto a los par??metros asociados a la biomasa y a su preparaci??n, se puede destacar
la propia disponibilidad de la biomasa y su caracterizaci??n f??sico-qu??mica (composici??n
qu??mica, humedad, granulometr??a y densidad). Desde el punto de vista del proceso de
combusti??n, tienen especial influencia el tipo de horno empleado, los par??metros de dise??o y los ajustes realizados en los par??metros de operaci??n. Finalmente, es fundamental la
utilizaci??n de sistemas de depuraci??n de gases para la eliminaci??n de part??culas, siendo los equipos m??s recomendados por su eficiencia los precipitadores electrost??ticos y los filtros de mangas.
En el documento se muestran una serie de casos pr??cticos donde se puede ver la influencia de estos par??metros sobre las emisiones y la eficiencia del proceso de combusti??n
The downregulated membrane expression of CD18 in CD34+ cells defines a primitive population of human hematopoietic stem cells
Full text linkSuperoxide anion (O2-) collisions with CO2 molecules in the energy range 50-950 eV
Full text linkA novel gas-phase molecular scattering study is reported for O2??? collisions with CO2 for
impact energies ranging from 50 to 950 eV in the lab frame. The absolute total electron
detachment, relative total and partial ionization cross sections have been measured within this energy range together with the positive ion yields. The primary anionic beam
projectile is produced in a pulsed hollow cathode discharge induced plasma, and its
interactions with the neutral molecular target occur in a gas cell at a well-known constant pressure. For impact energies above 500 eV high mass (m> 44 u) charged complexes
have been detected. With the aid of a theoretical study, using ab initio methods, we propose a mechanism to infer on the formation of these cationic species, which have been assigned to projectile-target stable compounds (CO3+ and CO4+)
SOSTENIBILIDAD DEL PLAN ENERG??TICO ARGENTINO 2030 Resultados Preliminares
Full text linkEl presente trabajo busca estudiar la sostenibilidad del plan energ etico argentino hacia el
a~no 2030 con m ultiples opciones. Para ello se desarrolla el concepto de sostenibilidad y sus
componentes mas importantes. Al hablar de sostenibilidad se debe considerar el concepto a
nivel mundial, con la cooperaci on colectiva de todas las Naciones.
El no tomar acciones en los consumos energ eticos actuales podr a comprometer el bienestar
de futuras generaciones alterando en forma notable el planeta tierra.
Se aborda tambi en el concepto de modelos energ eticos y su importancia para poder guiar
los planes energ eticos de una Naci on. En simultaneo se describe su estructura, analizando su
conveniencia y exponiendo los aspectos de los modelos y el error que cometen
Agrivoltaics: Integration of Reused PV Modules
Full text linkThis study evaluates the integration of reused PV modules within an agrivoltaic system designed for sustainable horticultural production, focusing on energy performance and agricultural outcomes. The experimental setup included both new and partially repaired PV modules, installed over tomato crops under real operating conditions. The results demonstrate that reused PV modules exhibit a strong and consistent energy performance, achieving correlations between irradiance and energy output comparable to new panels. Despite slightly lower performance ratios, reused modules maintained stable efficiency and operational viability, emphasizing their potential for sustainable applications. On the agricultural side, shading provided by PV panels protects the crop yield. This study highlights the environmental and economic advantages of incorporating reused PV modules into agrivoltaic systems, including reductions in raw material extraction, electronic waste generation, and overall environmental impact. By leveraging the circular economy principles, agrivoltaics with reused PV modules provide a sustainable pathway to balance energy production and food security while optimizing land use efficiency. These findings establish the potential of agrivoltaics as a key technology in advancing the sustainable energy transition
Power Smoothing in a Wave Energy Conversion Using Energy Storage Systems: Benefits of Forecasting-Enhanced Filtering for Reduction in Energy Storage Requirements
No full textThis paper presents a power smoothing strategy for wave energy converters (WECs) by means of energy storage systems (ESS) with integrated forecasting filtering algorithms applied to their control. The oscillatory nature of wave energy leads to high variability in power output, posing significant challenges for grid integration. A case study in Tenerife, Spain, was modeled in MATLAB-Simulink (release r2020b) to evaluate the impact of prediction-enhanced smoothing filters on ESS sizing. Various forecasting algorithms were assessed, including Bayesian Neural Networks, ARMA models, and persistence models. The simulation results demonstrate that the use of forecasting algorithms substantially reduces energy storage requirements while maintaining grid stability. Specifically, the application of Bayesian Neural Networks reduced the required ESS energy by up to 36.52% compared to traditional filters. In a perfect prediction scenario, reductions of up to 53.91% were achieved. These results highlight the importance of combining appropriate filtering strategies with advanced forecasting techniques to improve the technical and economic viability of wave energy projects. The paper concludes with a parametric analysis of moving average filter windows and prediction horizons, identifying the optimal combinations for different sea conditions. In summary, this study provides practical information into reducing the storage capacity required for power smoothing in wave energy systems, thereby contributing to the mitigation of grid integration challenges that may arise with the large-scale deployment of marine renewable energ
Sephardic origins revealed for rare skin disorder, recessive dystrophic epidermolysis bullosa, in individuals carrying the unique c.6527insC mutation
No full textBackground: Recessive dystrophic epidermolysis bullosa (RDEB) is a rare and severe blistering skin disorder caused by loss-of-function mutations in the type VII collagen gene (COL7A1). The COL7A1 c.6527insC mutation is curiously prevalent among individuals with RDEB and is found worldwide in Europe and the Americas. Previous research has suggested the possibility of a Sephardic Jewish origin of the mutation; however, individuals with RDEB are not known to have predominant Jewish ancestry.
Methods: In this study, a global cohort of individuals with RDEB with the c.6527insC founder mutation from Spain, France, Argentina, Chile, Colombia and the USA were investigated by autosomal genotyping, pairwise identical-by-descent matching and a local ancestry analysis. Age estimation analysis was performed to determine when Jewish founders introduced the c.6527insC mutation into Iberian and Native American populations (~900 CE and 1492 CE, respectively).
Results: Sephardic ancestry was identified at the haplotype spanning the c.6527insC mutation in 85% of the individuals, despite mixed ancestry elsewhere in the genome and no known recent Sephardic ancestry. Identical-by-descent matching between this RDEB subpopulation and a known crypto-Jewish community in Belmonte, Portugal was also ascertained, providing support for crypto-Jewish ancestry in this RDEB subpopulation.
Conclusion: The identification of this unique RDEB subpopulation unified by the single most prevalent c.6527insC mutation holds great potential to facilitate promising new RDEB therapies using CRISPR Cas 9 gene and base editing. The identification of a single guide RNA allowing efficient and safe editing of this variant would represent a unique drug to treat a large cohort of patients with the same founder mutation
Effect of radio frequency power and total mass-flow rate on the properties of microcrystalline silicon films prepared by helium-diluted-silane glow discharge
Full text linkHydrogenated microcrystalline silicon thin films have been prepared by plasma-enhanced chemical vapor deposition at relatively low deposition temperatures (180 ??C). Helium dilution of silane, instead of the more commonly approach of hydrogen dilution, has been used to promote microcrystalline growth. The effect of the applied radio frequency power (RFP) and the total gas flow on the structural, optical and electrical characteristics have been studied. As observed from the structural measurements, microcrystalline growth is favored as the applied RFP is increased and/or the total gas flow is decreased. Increasing the RFP however, brings associated an increase in the defect density in the amorphous tissue surrounding the crystalline grains and/or an increase in intra-grain defects as deduced from the structural, optical and electrical measurements. Microcrystalline growth and defect formation is rationalize in terms of the He* deexcitation process and high energy He+ ions bombardment
