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Dataset supporting publication of manuscript_GCB-B-RA-24-138

Germanium is a low-cost alternative to the highly expensive III-V semiconductors commonly used on thermophotovoltaic (TPV) devices. Despite efficiencies up to 16.5 % having been theorized in previous works, no experimental efficiencies have been reported so far for germanium-based devices. In this work, we present the first experimental germanium TPV cell efficiency measured under high view factor and high temperature irradiance conditions. Efficiencies and electric power densities up to 11.2 % and 1.43 W/cm2 have been obtained using a graphite emitter heated at 1440ºC.

This comprehensive review examines the multifaceted relationships involving demand response aggregators within the electricity sector. Focusing on interactions with stakeholders such as electricity suppliers, system operators, distributed energy resources, and flexibility-requesting parties, the paper delves into critical aspects including market dynamics, compensation models, balancing responsibilities, and contractual frameworks.

Under the Positive Energy Districts framework, cities authorities must be informed of the energy demand of districts to design tailor-made policies and strategies to promote the deployment of energy efficiency, sharing and transition actions. However, the diverse data sources and long procedures to collect data because of privacy permissions may result in a slow-down of the development of these roadmaps. To overcome these challenges, this paper is the outcome of the methodology developed under the UP2030 Project designed to estimate the energy demand and energy profile consumptions within urban areas to contribute to the stakeholders involved in decision making processes to inform them about the savings potential related with the use of energy in geographically delimitated areas. The methodology was validated in CIRCE’s headquarters, where the yearly energy estimation consumption is about 98% of the real energy consumed. The main finding of this study is obtaining a model that can estimate the energy usage for occupants’ comfort with minimal data required from the citizens’ side, which will allow stakeholders to consider global energy estimations at the district level in a fast and reliable way to design strategies in a timely manner as required by the energy transition and efficiency standards proposed by the European Union.

This study develops a multidimensional framework to assess cumulative exposure to climaterelated risks across Europe, integrating health, energy, transport, and socioeconomic conditions. By mapping risk distribution across regions and measuring dependence, we capture the interconnectedness of exposures and identify key socioeconomic drivers. Our findings reveal a substantial variation in risk distribution, with no clear geographical patterns. Unsurprisingly, household income emerges as the strongest determinant of exposure. We extend this analysis by projecting cumulative exposure to 2050, applying climate scenarios. The results suggest gradual rather than sharp change in exposure over time, with some areas exhibiting sharp rises; however, average risks are expected to rise across the entire continent.

The GRAPHERGIA project collaborated to release a new scientific publication in a journal, a contribution led by our partner ESYCOM, a laboratory attached to the Université Gustave Eiffel. This paper, "Power management technologies for triboelectric nanogenerators” was published in MRS BULLETIN | VOLUME 50 • MARCH 2025. It shares research on the GRAPHERGIA project’s Work Package 4 ‘Advanced electrical modelling and efficient power management of TENGs for energy harvesting and self-powered sensing IoT applications. GRAPHERGIA’s Scientific Paper Abstract A triboelectric nanogenerator (TENG) is a device that utilizes contact electrification and electrostatic induction to convert mechanical energy into electrical energy. It enables self-powering of electronic devices by harvesting mechanical energy from the environment. Its applications include biomedical devices, wearable electronics, and Internet-of-Things (IoT) sensors. Extracting electrical energy from TENG remains challenging due to its time-varying nature and low internal capacitance. Effective power-management techniques are essential for TENG energy-harvesting systems, yet research on dedicated integrated power-conversion methods is currently limited. Given the growing interest in TENG, a comprehensive exploration of energy-harvesting systems is critically necessary. This article synthesizes and compares current advancements in triboelectric energy-harvesting systems, emphasizing strategies to enhance output power through various power-conversion techniques. Additionally, it explores techniques employed in other energy-harvesting systems to inspire innovative approaches in TENG system design. About the authors A team of researchers from France, the Netherlands and China authored this publication. These authors are: Sijun Du (Corresponding author), Delft University of Technology, Delft, Department of Microelectronics, The Netherlands Philippe Basset, ESYCOM Lab, Univ Gustave Eiffel, CNRS, Marne‑la‑Vallée, France Hengyu Guo, Chongqing University, College of Physics, Chongqing, China Dimitri Galayko, LIP6 Laboratory, Sorbonne Université, Paris, France Armine Karami, ESYCOM Lab, UnivGustave Eiffel, CNRS, Marne‑la‑Vallée, France

This presentation belongs to a presentation that was given during the Winter School on 'Consequences of climate change addressed through SES applied to water and wastewater management for increased resiliency and efficiency, and IT solutions or current/circulation models for coastal management', held on 27-31 January 2025 in Ancona, İtaly for SMART4ENV Project. The winter school lasted for 5 days and Presentations/studies/lectures were presented on the first 2 days on "Wastewater Field", on the 3rd day on "Coastal protection and resilience under the threat of climate change", on the 4th day on "Water and Wastewater" and on the 5th day on "Coastal". The first presentation of the lectures titled "Coastal", held on the 5th day, Dr. Lorenzo Melito from UNIVPM shared about widely known numerical model for coastal dynamics (FUNWAVE-TVD) and wind wave propagation.

Vigilants de la Calor és un projecte de ciència ciutadana que estudia la calor extrema dins les llars de famílies amb infants amb l’objectiu d’informar l’acció pública i orientar les polítiques d’adaptació al canvi climàtic a les necessitats i expectatives dels infants. Durant l’estiu de 2024, 100 infants de tres escoles situades als barris del Carmel a Barcelona, Fondo a Santa Coloma de Gramenet i Collblanc-La Torrassa a l’Hospitalet de Llobregat han esdevingut Vigilants de la Calor i han recollit noves dades sobre el confort tèrmic dins les seves llars usant Diaris de la Calor, enquestes i sensors. Així mateix, els infants també han compartit les seves pràctiques i propostes per adaptar els seus espais quotidians a la calor. Aquesta jornada final té com a objectiu compartir l’experiència de la primera edició de Vigilants de la Calor, posar en comú els principals resultats i aprenentatges, i plantejar plegades les implicacions del projecte en termes d’adaptació climàtica centrant-nos en educació, habitatge, salut, i disseny urbà.

The presentation was part of the TRIQUETRA Workshop/Training course, which took place on January 8th 2025.