Results 41 to 50 of about 880,026 (250)

Potencial de produção de energia eólica em parques offshore [PDF]

open access: yes, 2013
A produção de energia eólica é essencial para o cumprimento dos objetivos europeus, no âmbito das energias renováveis. De acordo com as previsões da União Europeia (UE), a produção hidroelétrica irá manter a sua posição dominante como fonte de ...
Almeida, Tiago António de Sousa   +1 more
core   +1 more source

Ultra‐High‐Efficiency On‐Chip CO2 Conversion by Nanosecond Self‐Pulsing Micro‐Plasma Devices

open access: yesCarbon Energy, EarlyView.
A micro‐plasma chip with sub‐10‐μm electrode gaps is introduced for efficient CO2‐to‐CO conversion. The device self‐converts a DC power supply into nanosecond pulses, producing field‐emission electrons that vibrationally excite CO2, driving dissociation via the ladder‐climbing mechanism. A scaled‐up chip array achieves 30% single‐pass conversion and 50%
Guangyu Sun   +5 more
wiley   +1 more source

System RESHeat: integracja odnawialnych źródeł energii dla zrównoważonych rozwiązań energetycznych budynków

open access: yesEnergetyka Rozproszona.pl
Artykuł przedstawia system RESHeat, który łączy odnawialne źródła energii (OZE) służące do produkcji energii elektrycznej, ciepła i chłodu dla budynków wielorodzinnych, z naciskiem na zrównoważone rozwiązania energetyczne.
Paweł Ocłoń   +8 more
doaj   +1 more source

Panorama da Segurança Física de Fontes Radioativas no Brasil

open access: yesBrazilian Journal of Radiation Sciences, 2018
A ameaça de “terrorismo radiológico” foi reconhecida mundialmente após o evento de 11 de setembro de 2001. Fontes radioativas podem ser utilizadas para construção de DDR - Dispositivos de Dispersão Radiológica (“bomba suja”). Estudos demonstram que o uso
Alexandre Roza de Lima   +3 more
doaj   +1 more source

Distributed multi-generation systems: energy models and analyses [PDF]

open access: yes, 2009
Libro riguardante la caratterizzazione di sistemi per la produzione combinata di energia da sistemi di multi-generazione distribuita (Distributed Multi-Generation, DMG).
Chicco, Gianfranco   +1 more
core  

Comprehensive Analysis of the Degradation Phenomena of Proton Exchange Membrane Water Electrolyzers with Iridium on Antimony Tin Oxide Anodes

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This study examines the structural and chemical evolution of low‐loaded Ir/ATO anodes during PEM water electrolysis under realistic conditions. Iridium dissolution is largely suppressed. In the early stages, both ionomer and support degradation are detected. Morphological reorganization occurs at the interface between the anode catalyst layer (ACL) and
Sambal Shashank Ambu   +11 more
wiley   +1 more source

Energia incorporata [PDF]

open access: yes, 2014
Voce dell'Enciclopedia Wikitecnica.
Sferra, ADRIANA SCARLET
core  

Ground‐ and Excited‐State Mixed Valency in a 4,4′‐Bipyridine‐Bridged Bimetallic Di‐Ruthenium Complex

open access: yesEuropean Journal of Inorganic Chemistry, EarlyView.
Photoinduced mixed‐valence interactions across a 4,4′‐bpy bridge were studied. MLCT excited states in the bimetallic complex are longer‐lived than in the monometallic reference, thanks to metal–metal electronic coupling and hole delocalization, but are still shorter than the nanosecond timescale relevant for diffusional reactivity.
Ivana Ramírez‐Wierzbicki   +3 more
wiley   +1 more source

Energia incorporada em materiais de construção versus energia operacional [PDF]

open access: yes, 2011
O consumo de energia é um dos desafios mais importantes com que se confronta Portugal. Por um lado devido ao facto da maior parte dessa energia ser importada e por outro porque uma parte significativa da mesma é produzida em centrais termoeléctricas ...
Jalali, Said, Pacheco-Torgal, F.
core  

A Review of Overcurrent Protection in Smart Grids Under Cyber‐Physical Threats With a Cyber‐Physical Evaluation Framework

open access: yesEnergy Science &Engineering, EarlyView.
By manipulating current and voltage measurements, an assailant can induce unwanted relay action while attempting to avoid detection. Detecting advanced cyber intrusions in power protection environments requires specialised data analysis and anomaly detection methods.
Feras Alasali   +6 more
wiley   +1 more source

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