A5003650181- Energy and Environment Impacts
- Photovoltaic Systems and Sustainability
- Business and Management Studies
- Silicon and Solar Cell Technologies
- Environmental Sustainability and Education
- Quantum Dots Synthesis And Properties
- solar cell performance optimization
- Rural Development and Agriculture
- Silicon Nanostructures and Photoluminescence
- Thin-Film Transistor Technologies
- Luminescence Properties of Advanced Materials
- Agricultural and Food Sciences
- Islanding Detection in Power Systems
- Microgrid Control and Optimization
- Photovoltaic System Optimization Techniques
- Advanced Semiconductor Detectors and Materials
- Transition Metal Oxide Nanomaterials
- Semiconductor Quantum Structures and Devices
- Science and Education Research
- Biodiesel Production and Applications
- Interconnection Networks and Systems
- Water-Energy-Food Nexus Studies
- Digital Economy and Work Transformation
- Perovskite Materials and Applications
- Nanotechnology research and applications
Universidade Federal do Rio Grande do Sul
2021-2024
Pontifícia Universidade Católica do Rio Grande do Sul
2009-2018
Universidad Politécnica de Madrid
2007-2010
The influence of the thickness reduction bifacial solar cells has been investigated using Czochralski (Cz) substrates with thicknesses 140 and 240 μm. Thickness increased cell performance for both illumination modes, unlike conventional structure, thin one presents higher efficiency when illuminated by n <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">+</sup> junction. good light trapping properties low rear recombination have revealed efficient...
Up-converters use radiation normally transmitted by the solar cell and converts it to radiation, which can be converted electric energy. Therefore, an up-converter should placed on rear side of a bifacial cell. This has advantage that no impairment impinging takes place. The number photons may is limited absorption range efficiency up-conversion. High transmittance required in photoluminescence materials enhances up-conversion phenomena. material absorb over wide spectral emit up- converter....
Up Converters implemented in solar cells have theoretical efficiencies of the conversion much higher than actual and a smaller production price. However, experimental results present are not approaching calculated values, because they small increase photocurrent by incorporating bifacial cell, for example. Hence, it is necessary dispose quantitative tool characterization candidate materials as up converter, which permits realize an influence sensibility analyzes certain parameters contrasts...
This paper describes a study, which enables the implementation of microinverter for grid-tied photovoltaic applications. The system consists Ćuk converter in cascade with full-bridge current source inverter. converter, working DCM, synthesizes sinusoidal waveform, absolute value, synchronized power grid. A simple square wave (SQW) full bridge inverter is connected order to obtain waveform at its output, SQW control aims minimize switching losses. connection microgeneration systems into...
Dentre as fontes alternativas de energia que apresentam crescimento no Brasil e mercado atual surge a solar fotovoltaica. Através leilões setor incentivos do governo, implantação usinas solares fotovoltaicas está tornando-se uma realidade. Entretanto existem poucos estudos nacionais referentes aos sistemas aterramento destas usinas. Assim, o presente trabalho abordará dimensionamento um sistema aterramento, com base em pesquisas internacionais, demonstrando os passos devem ser cuidados para...
The quantum efficiency measurement provides an important information of the solar cell performance. In this paper we report on extension external to near-infrared range. It is necessary characterize effect up-converter layers rear bifacial silicon cells, which can enhance performance cells as they have ability condition spectrum, thus suiting semiconductor bandgap better. main issue for that measurements signals want detect are very small, effort has been made signal-to-noise ratio by using...
Performance and emission evaluations in a diesel power generator fuelled with Brazilian commercial (petroleum 5% biodiesel), pure biodiesel (B100), addition of waste frying oil order to obtain 20%, 30%, 50%, 75% blends were performed. Biodiesel was produced by two-step transesterification process. The characterized respect methyl ester content, density flash point. Blends analyzed quantify added petroleum diesel. Electrical performance the engine-generator group (two-cylinder, 13 kVA)...
This paper proposes strategies for the improvement of technical and administrative procedures, educational community extension in order to improve school environmental performance thus provide access technologies stimulate discussion on sustainable use natural resources. The project Sustainable School proposed by evaluating State High Padre Nunes, City Gravatai, Rio Grande do Sul, preparation a report containing suggestions action management, teaching support taking decisions administration...
The connection of distributed generation systems to the power grid poses many challenges. One them is synchronization between micro inverter output voltage and utility voltage. Thus, this work proposes use a PLL algorithm, in order establish both voltages. paper addresses development microinverter, or module integrated inverter, based on Ćuk converter, operating DCM. proposed microinverter consists three stages, associated cascade: PV array, DC-DC converter; full-bridge current source (CSI)....
The waste management industry is becoming progressively important due to increasing environmental responsibility and the establishment of strict regulations. In addition, there a growing demand for electricity consequent development new technologies. These are main factors that stimulate renewable energy research. this scenario, solar photovoltaic turns out be an excellent alternative production electricity. article aims analyze industrial process used produce through modules compare impact...
O projeto “Smart Solar Energy – Sistema de monitoramento produção solar fotovoltaica” consiste em um sistema on-line, baseado na construção dispositivo capaz monitorar as situações que se encontram os módulos fotovoltaicos. Para isso, foi desenvolvido aplicativo para smartphone, possibilita o envio notificações alerta ao usuário sobre sombreamento e sujidade nos módulos. A partir da combinação uma interface hardware composta por sensores corrente contínua do tipo Hall, transformador...
No Brasil também há uma tendência de aumento da atuação das mulheres na área energia. Por exemplo, no VII Congresso Brasileiro Energia Solar (CBENS) 27% dos participantes foram mulheres. Este número é significante em comparação com outros dados desigualdade gênero exatas, porém, ainda fração pequena dentro do setor. Com o objetivo tornar visíveis líderes campo científico, tecnológico, empresarial e industrial emergia solar propor modelos alternativos aos que geralmente são divulgados mídia...
No Brasil, foi identificado um aumento de instalações sistemas fotovoltaicos no setor geração distribuída maior que 100% entre 2020 a 2022. entanto, as mulheres ocupam apenas aproximadamente 20% dos postos trabalho relacionados esta inserção. Os empregos mundiais diretos ocasionados pelas energias renováveis até 2021 são doze milhões, e 2050 acredita-se este número dobrará. Muitos os desafios à inclusão ampliação da participação feminina na energia solar. Sendo assim, o objetivo deste é...
No ensino de Física, na educação básica, é comum dar-se ênfase à história cientistas homens e ocultar a trajetória mulheres. Entre as características desejáveis um docente, espera-se que o mesmo possa contribuir formação alunos críticos. Em vista disso, este trabalho propõe uma metodologia traz discussão sobre representatividade gênero ciência junto com aprendizagem conceito físico. Pretende-se fazer uso enredo narrativo como estratégia potencial, apresentando inicialmente da cientista...
Atualmente, no Brasil, as mulheres são maioria dos concluintes nos cursosde ensino superior e estão com representação acima de 50% cursos depós-graduação. Entretanto, quando avaliada a distribuição percentual dosconcluintes graduação, por gênero, acordo grandes áreas cursos,torna-se evidente baixa representatividade das nas científicas etecnológicas. Sendo assim, o objetivo deste trabalho é analisar representatividadede estudantes bacharelado Interdisciplinar em Ciência Tecnologia(BICT)...
This paper evaluates the enhancement of up-conversion phenomena by combining rare-earth doped phosphors with PbS quantum dots (QDs). We present results on characterization two different ways adhering up-converter this fluorescent material to bifacial solar cells: dissolving powder in a spin-on oxide and it silicone gel. The improvement photocurrent detected for both alternatives when including QDs is 60% better than without them. It shown that absorption emission characteristics embedded can...