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Copyright of GeSec: Revista de Gestao e Secretariado is the property of Sindicato das Secretarias e Secretarios do Estado de Sao Paulo (SINSESP) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Solar irradiation is the amount of solar energy that reaches a specific surface during a given period of time. This research examines the historical behavior of solar irradiation in the period from 2012 to 2022 in the Portoviejo canton, Ecuador. The data were obtained from the Nasa Power Data database in order to calculate the average solar irradiance on university campuses and define the peak solar hours (PSH). These data were tabulated and processed using the Minitab 21 statistical program. The objective was to design a solar map that describes the irradiation potential in the canton, which will serve as a basis for the installation of photovoltaic systems. [ABSTRACT FROM AUTHOR]

El potencial solar de Ecuador fue explorado mostrandose elevado para la favorable puesta en marcha de sistemas fotovoltaicos, con un mayor enfoque en la cordillera de los Andes. En la región Costa, los niveles de irradiación global horizontal mantienen la tendencia de ser factibles para la optimización energética en establecimientos por medio de paneles fotovoltaicos. Fue desarrollada una propuesta para mejorar la eficiencia energética de la empresa informática Altura S.A. mediante el software de licencia comercial, PVsyst 7,2; mostrando resultados positivos en lo técnico y económico, produciendo un excedente energético del 14,11% con un periodo de recuperación de 15,7 años, evitandola emisión de 1,33 toneladas de CO2 anualmente. A su vez, se establecieron diversas barreras que impiden la penetración de estos sistemas como las políticas, sociales, etc, así como el gran y reforzado uso de fuentes convencionales de energía a pesar de la factibilidad mostrada en este estudio.

Introduction: The optimization of renewable energy resources is transcendental to satisfy the world energy demand and to avoid the adverse effects produced by the burning of fossil fuels. Therefore, there are several studies that seek to estimate the capacity of renewable energy sources in a geographical location. Likewise, there are several software applications that seek a balance between the investment and the installed capacity of an electric power generating plant. Objective: This work uses the results of the Random Forest algorithm to predict solar radiation from satellite images. This technique achieved a performance in R2 of 0.82 and in RMSE of 107.05. The purpose of this study is to evaluate the results of 2 models of photovoltaic systems designed for 10 different locations in the Colombian territory. Model M1 uses solar radiation data from NASA. The M2 model uses solar radiation data generated by Random Forest. Methodology: The evaluation of solar radiation from NASA and the Random Forest algorithm is based on simulations provided by the energy resource optimization tool Homer Pro. Results: The simulations of both models in Homer Pro show a difference in the capacity of the system components of between 0.0% and 47.31%. The difference between electric power generation ranges from 0.0% to 11.99%. Similarly, the difference between system costs is between 1.34% and 23.64% respectively. Conclusions: The solar radiation data estimated by Random Forest is constituted as an alternative to the solar radiation data provided by NASA, given that the differences in the capacity of system components, electric power generation and total system costs are on average at around 27%. [ABSTRACT FROM AUTHOR]

The world soybean production has doubled in the last 20 years, and Brazil was responsible for 52% of all soybeans exported worldwide in the 2021-2022 harvest. The state of Goiás accounts for 14.1 million tons of soybeans, and the Brazilian Midwest region was responsible for 46% of the 2021-2022 national harvest. Soybean production requires considerable electricity consumption. However, it is worrying that, in 2021, around 72% of the electricity used by the Brazilian agricultural sector came from non-renewable sources, such as firewood and diesel oil. In this context, the main objective of this study is to analyze the correlation between soybean production, electricity consumption, and the potential for reducing carbon dioxide emissions that can be achieved if rural producers choose to adopt photovoltaic energy systems. In evaluating this correlation, the analysis focuses on the period from 2005 to 2019, using secondary data with proven reliability. The results obtained reveal a strong correlation between soybean production and electricity consumption in rural areas. Furthermore, it is possible to identify that the introduction of photovoltaic generation systems would have avoided the emission of approximately 66 tons of CO2 during the 2020 harvest season in the southeastern region of Goiás. Given the significance of soybean cultivation in this region, these findings have significant implications for rural electrification program planning and management, as well as the development of more sustainable agricultural practices. [ABSTRACT FROM AUTHOR]

Ecuador's solar potential was explored, proving high for the favorable implementation of photovoltaic systems, with a greater focus on the Andes mountain range. In the Coastal region, global horizontal irradiation levels maintain the trend of being feasible for energy optimization in establishments through photovoltaic panels. A proposal was developed to improve the energy efficiency of the computer company Altura S.A. via commercial license software, PVsyst 7.2; showing positive technical and economic results, producing an energy surplus of 14.11% with a recovery period of 15.7 years, avoiding the emission of 1.33 tons of CO2 annually. In turn, various barriers were established that prevent the penetration of these systems such as political, social, etc., as well as the great and reinforced use of conventional energy sources despite the feasibility shown in this study. [ABSTRACT FROM AUTHOR]

Copyright of Tesla Revista Científica is the property of Puerto Madero Editorial Academica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

El presente trabajo se enfoca en la optimización del seguimiento de máxima potencia (MPPT) en sistemas fotovoltaicos mediante el empleo de un enfoque basado en regresión lineal. El objetivo principal consiste en desarrollar un algoritmo de MPPT que utilice técnicas de regresión lineal para mejorar la precisión en la identificación y seguimiento del punto de máxima potencia. El algoritmo propuesto se desarrolla en el software MATLAB/Simulink, validándose a través de pruebas experimentales. Posteriormente, se amplía la aplicación del algoritmo a una red eléctrica modelada y simulada en el entorno de la herramienta HYPERSIM, este software permitirá abordar de manera más detallada y precisa la dinámica instantánea de las variables eléctricas y de control en sistemas complejos, mediante la variación de variables como temperatura e irradiación. La contribución innovadora de este trabajo no solo se circunscribe a la mejora de los algoritmos de MPPT, sino que también aborda de manera integral la integración de energías renovables en sistemas eléctricos. La eficacia del algoritmo basado en regresión lineal representa un avance crucial para maximizar la eficiencia y respuesta del control en sistemas fotovoltaicos. La optimización de la conversión de energía solar en electricidad utilizable no solo eleva la rentabilidad y sostenibilidad de estos sistemas, sino que también destaca el papel fundamental que desempeñan en la transición hacia un suministro eléctrico más sostenible.

Los Sistemas Solares Fotovoltaicos (SSFV) forman parte de la estrategia de desarrollo del Gobierno cubano para diversificar la matriz energética disminuyendo la dependencia de combustibles fósiles e introduciendo tecnologías amigables con el medio ambiente. Su implementación a nivel residencialse ha confiado a la empresa COPEXTEL y uno de los problemas principales que enfrenta es la condición actual que presentan los sistemas eléctricos en las residencias cubanas que,en su mayoría,no poseen puesta a tierra ni protección diferencial que permita la protección ante corrientes de fuga. Otro problema, no menos importante, es el requerimiento de que el SSFV pueda ser utilizado cuando no haya conexión a la red, lo cual actualmente no es posible. Resulta necesario definir cuáles son los niveles de puesta a tierra requeridos, así como una solución que permita considerar un servicio eléctrico con alta vitalidad, aun cuando no haya alimentación desde la red eléctrica convencional.

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

En el presente artículo se presenta el estudio de la estimación de demanda de una estación de carga de vehículos eléctricos basado en el uso de simulación de Montecarlo. La modelación del sistema eléctrico se lo realiza a través del software de PowerFactory, por otra parte, para el desarrollo de las simulaciones de Montecarlo y el procesamiento de la información, se lo realiza a través del uso del software de Python. El análisis en general está enfocado en determinar el impacto de la integración de vehículos eléctricos en la red eléctrica, de forma que se generan escenarios que emulen la operación de la electrolinera, teniendo en cuenta la demanda de vehículos eléctricos dentro de sus puntos de carga, de forma que se generan escenarios aleatorios considerando el número de vehículos conectados y el porcentaje de carga de los vehículos. Otro aspecto que se considera es la integración de sistemas de generación fotovoltaica, de forma que se realiza el análisis de su impacto en la operación de la red eléctrica teniendo en cuenta la operación aleatoria de la electrolinera.

La apertura a la Generación Distribuida (GD) en Bolivia se dio con la promulgación del Decreto Supremo Nº 4477 (marzo de 2021), en este marco, las empresas distribuidoras presentan un nuevo desafío para asegurar la calidad del suministro de energía, considerando inyecciones potenciales a sus redes. Para preveer posibles impactos negativos en la red de distribución de la empresa ELFEC en Cochabamba, se estudiaron escenarios de potenciales inyecciones por parte de generadores distribuidos en la ciudad de Cochabamba, para ello se estudiaron las dos instalaciones fotovoltaicas de mayor potencia en la región, que actualmente funcionan en modo autoconsumo. Los sistemas estudiados fueron: el parqueo solar del campus Julio León Prado de la Universidad Privada Boliviana (UPB) y la instalación de ENDE (Empresa Nacional de Electricidad) Transmisión. Sobre la base de la potencia instalada y el consumo propio de cada instalación, se estudiaron los flujos inyectados y se observaron cambios en los valores de los parámetros eléctricos de trabajo como: potencia activa, reactiva y voltaje en el nodo cercano y en el transformador de la red de distribución de la empresa, observando así los posibles impactos en el suministro de energía.

Solar Photovoltaic Systems (SSFV) are part of the Cuban Government'sdevelopment strategy to diversify the energy matrix by reducing dependence on fossil fuels and introducing environmentally friendly technologies. Its implementation at the residential levelhas been entrusted to the company COPEXTEL. One of the main problems it faces is the current condition of the electrical systems in Cuban residences, most of which do not have grounding or differential protection to protect against leakage currents. Another problem, no less important, is the requirement that the SSFV can be used when there is no connection to the network, which is currently not possible. It is necessary to define the required grounding levels as well as a solution that allows considering an electrical service with high vitality, even when there is no power supply from the conventional electrical grid. [ABSTRACT FROM AUTHOR]

Copyright of Sustainability in Debate / Sustentabilidade em Debate is the property of University of Brasilia, Center for Sustainable Development and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

La instalación de Sistemas Fotovoltaicos (SFV) en Cuba es cada vez mayor, por lo que contar con herramientas que permitan simular el comportamiento de estos sistemas es de gran ayuda. A través del programa Power Factory se puede simular la influencia de los SFV en el Sistema Electroenergético Nacional (SEN) y analizar el comportamiento de todas las variables de interés. No obstante, en la configuración de los SFV en Power Factory se desconocen los modelos matemáticos que mejor describen la radiación solar para nuestro país. Es por ello que se simuló un SFV que incluye las combinaciones de modelos de radiación global y difusa para hallar la variante que más se acerca al resultado obtenido en PV*SOL con el propósito de validar la mejor combinación de modelos para la realización de futuros trabajos. Se analiza el comportamiento diario de los resultadosobtenidos y el factor de capacidad para asegurar la veracidad de los datos.

Se valoran diferentes parámetros que inciden en el planeamiento territorial con sistemas fotovoltaicos, se incluye el comportamiento del potencial solar de cada municipio, destacando los que reúnen las mejores condiciones para instalar una central fotovoltaica. Se evalúa el impacto económico y ambiental, se presenta información del potencial máximo y mínimo de cada territorio, además del comportamiento del ángulo de inclinación y el rendimiento técnico de la tecnología, se analiza la eficiencia energética, económica y ambiental en diferentes modos de conexión, se proponen los elementos técnicos que deben considerarse en el proyecto de montaje e instalación de la tecnología, además de los riesgos a que están sometidas estas instalaciones para asegurar una adecuada eficiencia de aprovechamiento del recurso solar, se valorar las pérdidas en los procesos de distribución y transportación de la electricidad, expresando los elementos que influyen y determinan los niveles de eficiencia en el aprovechamiento de la energía generada.

Changes in the availability and accessibility of alternative energy sources have been observed in recent years. This study analyzes the economic viability of the use of photovoltaic solar energy systems in equipment for the control and inspection of drinking water pipes. For this, the consumption, costs and operating times were reviewed using conventional sources and photovoltaic energy. The air conditioning system was found to be outdated and needs to be replaced with a leaner, more efficient one. However, portable electric generators should not be disabled, since they will serve as a backup on days when sunshine is the minimum necessary to recharge the batteries, with a contribution of close to 13.5% of the energy. These findings are useful for systems that are part of the jacket dipping process (rehabilitation of trenchless drainage pipes) used by municipal companies that provide home services. [ABSTRACT FROM AUTHOR]

The province of San Juan in Argentina presents significant values of solar radiation that stimulate the development of distributed solar photovoltaic generation. Moreover, National Law 27.424 proposes Net Billing as an incentive mechanism for renewable energy sources. This work analyses the profitability of photovoltaic systems in the residential sector under current electricity costs and fare conditions. The analysis allows comparing the leveled cost to generate electricity through photovoltaic generation in contrast to the price of energy consumed from the grid. The results show that, on average, the leveled cost of photovoltaic generation is 20% higher than the average value of the fares for residential users. It is necessary to apply incentive mechanisms as proposed in Law 27.424. to achieve grid parity. In this sense, the impact of the Net Billing mechanism is analyzed and compared with the impact of the Net Metering mechanism. The results show, a priori, that the Net Metering mechanism would be more profitable or economically beneficial for owners of photovoltaic systems. However, this scheme could adversely impact the utilities' incomes. Finally, discussions on incentive mechanisms are introduced to improve the profitability of photovoltaic systems and to assist the government in making decisions to promote these systems. [ABSTRACT FROM AUTHOR]

The installation of Photovoltaic Systems (SFV) in Cuba is increasing. Therefore, having tools that allow the behavior of these systems to be simulated is of great help. Through the PowerFactory 15.1 program, it is possible to simulate the influence of the SFVs in the National Electroenergetic System (SEN) and analyze the behavior of all the variables of interest to ensure its correct operation. It happens that in the configuration of the SFVs in PowerFactory the mathematical models that best describe the solar radiation for our country are unknown. Solar radiation is broken down into a global component and a diffuse component. There are several models for each component, either global or diffuse. Simulations were made in PowerFactory with all possible combinations and they were compared in the same scenario with the data obtained in PV*SOL premium 2020 to validate the results obtained in PowerFactory. [ABSTRACT FROM AUTHOR]

A 7,5 kWp rated power grid connection plant installed at the Solar Energy Research Center (SERC) in Santiago de Cuba is used to assess direct current failures and quantify in a photovoltaic generator. It is part of the mathematical model of the photovoltaic generator, then a procedure is performed to quantify the operational losses of the photovoltaic generator and the mathematical model is adjusted to the actual conditions, through a polynomial adjustment. 100% of simulated failures were detected and identified, 99,6% of observations made are within the range set for a maximum false alarm cup of 0,4%, demonstrating its efficiency. [ABSTRACT FROM AUTHOR]

La limitada autonomía de los vehículos eléctricos representa uno de los principales problemas para su comercialización. Por esta razón es importante incrementar su autonomía, generando de esta manera una alternativa de solución a estos inconvenientes. Es necesario entonces, promover la utilización de este tipo de automóviles, dado que su uso disminuye notablemente el grado de dependencia del petróleo, promoviendo así el uso de las energías renovables. La implementación de paneles solares en los automóviles eléctricos es una respuesta al incremento de su autonomía, ya que permite aprovechar una fuente inagotable de energía (solar), permitiendo de esta forma reducir la contaminación ambiental, haciendo que el vehículo eléctrico se vuelva más atractivo para los usuarios. Este artículo detalla la implementación de un panel solar de 350 W en un vehículo eléctrico Dayang CHOK-S bajo diferentes condiciones meteorológicas, obteniendo como resultado el incremento de su autonomía en hasta un 33 % con respecto a su autonomía real. Además, se encontró que este porcentaje podría incrementar bajo condiciones de radiación solar bastante altas. Los resultados demuestran que la carga de las baterías es directamente proporcional a la cantidad de radiación solar; es decir, a mayor radiación solar, mayor va a ser la carga de las baterías del automóvil.

A energia solar fotovoltaica vem ganhando destaque no cenário mundial devido ao aumento das demandas energéticas e a busca de alternativas de energia limpa. Em razão dos problemas ambientais decorrentes do consumo de energia derivada de fontes poluentes e não renováveis, surge a necessidade de diversificar as matrizes energéticas. Dentro desse contexto, alguns municípios e empresas do Ceará já buscam ações para produção de energia limpa. Este artigo tem como objetivo analisar o sistema de energia fotovoltaica do Instituto Federal de Educação, Ciência e Tecnologia do Ceará - Campus Maracanaú e sua colaboração na redução da emissão de CO2. Para o cálculo da quantificação das emissões de CO2 evitadas a partir da instalação do sistema de energia fotovoltaica no Campus foi realizado o levantamento de dados in loco e utilizada a equação fornecida pelo Ministério de Ciência, Tecnologia, Inovações e Comunicações (MCTIC). Verificou-se que, desde a sua instalação, que o sistema produziu uma potência de 48,67 MWh, gerando redução de emissões de CO2 de 20,07 toneladas de 2015 a 2020, equivalente ao que seria emitido em matrizes não renováveis. Conclui-se que o sistema contribui para uma redução significativa de CO2 no município e espera-se que este estudo seja referência para que gestores do setor público e privado invistam em alternativas que possam diversificar a matriz energética brasileira.

Purpose - The research objective is to analyze the influence of key factors contributing to consumers' purchase intention grid-connected photovoltaic systems among residential energy consumers. Design/methodology/approach - A survey based on Korcaj et al. (2014) was conducted in a major Brazilian city; 209 valid responses were obtained directly. Data was analyzed using structural equation modeling. Findings - Among significant decision influences are environmental, financial, and autarchy benefits onto perceived global benefit and perceived behavioral control construct onto purchase intention; perceived social benefits, however, were not a relevant influence as opposed to previous studies. Research limitations/implications - Weakness of the model's reliability leading to the exclusion of the perceived total cost construct, which in turn could reduce sample bias and increase the reliability of the model and regarding clarity regarding the product "solar photovoltaic energy system", as no text was used; this could have left questions unanswered due to the lack of knowledge of respondents about solar technology. Practical implications - The high purchasing power and high education level, along with favorable weather and geography, may contribute to promising perspectives for the product. Furthermore, to promote adhesion of the technology in the city there is a need to increase benefits, to reduce perceived technology costs, and to value the importance of solar energy generation among reference groups. Social implications - The analysis of factors influencing the city's residents' intentions of to adopt photovoltaic systems favors further promotion of the technology in the city. Originality/value - It contributes to the development of consumer behavior studies regarding the adoption intention of ecologically sustainable technologies, i.e., GCPSs, thus, filling a gap in the literature on consumer behavior for this product. [ABSTRACT FROM AUTHOR]

Different parameters that affect the territorial planning with photovoltaic systems are valued, the behavior of the solar potential of each municipality is included, highlighting those that meet the best conditions to install a photovoltaic power plant. The economic and environmental impact is evaluated, information on the maximum and minimum potential of each territory is presented, in addition to the behavior of the angle of inclination and the technical performance of the technology, the energy, economic and environmental efficiency in different connection modes is analyzed, the technical elements that must be considered in the project of assembly and installation of the technology are proposed, In addition to the risks to which these facilities are subjected to ensure an adequate efficiency of use of the solar resource, the losses in the processes of distribution and transportation of electricity are assessed, expressing the elements that influence and determine the levels of efficiency in the use of the energy generated. [ABSTRACT FROM AUTHOR]

Copyright of PARC Pesquisa em Arquitetura e Construção is the property of Universidade Estadual de Campinas - Portal de Periodicos Eletronicos Cientificos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Resumo A instalação de sistemas fotovoltaicos mostra-se uma alternativa promissora para a geração sustentável de energia elétrica. A realização de estudos de viabilidade de instalações fotovoltaicas é de extrema importância para se verificar a disponibilidade do recurso solar no local de instalação. Esta pesquisa tem como objetivo comparar os resultados da análise econômica de um sistema fotovoltaico com diferentes estimativas de geração de energia elétrica, utilizando diferentes bases de dados de irradiação solar. Tendo como objeto de estudo o sistema fotovoltaico do campus Floriano do IFPI, foram obtidos dados de irradiação solar a partir de diferentes bancos e softwares dedicados, e estimada a produção de energia elétrica. Esta foi comparada com os dados reais de geração, obtidos através do software de monitoramento dos inversores do sistema, e submetida a testes estatísticos. Para cada amostra foi realizado um estudo econômico, utilizando os conceitos da engenharia econômica. Os resultados mostram que a escolha da metodologia de cálculo das estimativas de geração pode influenciar diretamente nos resultados das análises de viabilidade, o que pode levar a escolhas erradas. Dependendo do tamanho do erro, problemas podem surgir durante a utilização do sistema a curto, médio e longo prazo.

Neste trabalho é apresentado um algoritmo de controle de injeção de potência reativa em uma rede de distribuição elétrica radial com geração distribuída fotovoltaica. O algoritmo proposto tem como objetivo prover um balanço entre regulação de tensão e redução de perdas elétricas. A potência reativa injetada é controlada por meio de inversores de conexão à rede, que conectam seus respectivos geradores fotovoltaicos aos barramentos da rede de distribuição. O desempenho do algoritmo foi avaliado em uma rede elétrica monofásica rural de 100 barras por meio de várias simulações computacionais. Foram utilizados quatro fatores de penetração fotovoltaica na rede, e são apresentados os perfis de tensão em cada barra, assim como as perdas na distribuição. Nos resultados, o algoritmo proposto obteve as menores perdas e o melhor perfil de tensão (mais próximo a 1 pu) nos cenários simulados em comparação com outros algoritmos propostos na literatura.

The aim of the present research work is the design of a methodology of fault diagnosis as a contribution to the improvement of indicators about efficiency, maintenance and availability of Photovoltaic Systems of Network Connection (PVSNC). The network connection inverter and the mathematical model of the Photovoltaic Generator were firstly analyzed. Afterwards, the existing operational losses of the Photovoltaic Generator were quantified, and the mathematical model was adapted to the real conditions of the System through a polynomial adjustment. A real network connection system of nominal power 7.5 kWp installed at the Research Center of Solar Energy, in the province of Santiago de Cuba, was used to assess the proposed methodology. The results obtained were validated to show that the proposed design successfully supervises the PVSNC.100% of the simulated faults were detected and identified with the designed methodology, whose usefulness was additionally shown when having a maximum rate of 0.22% of false alarm in all the tests done.

Resumo A questão energética tem um significado relevante no contexto da busca do desenvolvimento sustentável, sendo condição essencial para encontrar caminhos alternativos para substituir o uso de combustíveis fósseis. O estado do Ceará possui potencial para o uso de energias renováveis, especialmente a eólica e solar. Este artigo tem como objetivo, analisar a contribuição da geração distribuída dos sistemas fotovoltaicos, conectados à rede elétrica, que proporcionam a redução das emissões de CO2 no estado do Ceará. Foram utilizadas informações de potência instalada da Agência Nacional de Energia Elétrica (ANEEL) e estimados os dados de energia gerada e as emissões de dióxido de carbono evitadas, a partir do uso de Geração Distribuída (GD) por fonte solar fotovoltaica. Esta pesquisa possibilitou o conhecimento da GD a partir de fonte solar fotovoltaica no Ceará, gerando alternativas para subsidiar as tomadas de decisões de incentivos, através de planos e programas governamentais, para a implantação de sistemas fotovoltaicos de micro e minigeração de energia, que contribuem para a redução das emissões de Gases do Efeito Estufa (GEE) na atmosfera.

En este trabajo se analiza el potencial fotovoltaico en cuatro ciudades colombianas, gracias a la información recopilada en Bogotá, Cúcuta, Manizales y Pasto. La metodología propuesta utiliza técnicas de agrupamiento que se implementan mediante el uso del software MATLAB®. Se exponen dos algoritmos de comparación presentados: K-means y Fuzzy C-means, y uno de visualización que es el Análisis de componentes principales (PCA) que ayuda en el análisis de resultados. Este artículo muestra estudios previos relacionados con la minería de datos y se describen los algoritmos mencionados anteriormente. Por otro lado, los resultados y discusión más relevantes, que corresponden a la factibilidad de implementación de las micro-redes, se determinan mediante el cálculo del Factor de Capacidad.

Introduction. The use of renewable sources of energy, and especially photovoltaics, has become a key tool in the field of cleaner production, helping to promote sustainable development in many sectors, including agriculture, becoming an opportunity for momentum for the sector. Objective. This study evaluated the performance of a photovoltaic panel installation with two different technologies through the design and construction of an electronic data acquisition device comparing power curves. Materials and methods. Two types of panel technologies were considered (polycrystalline and amorphous) as the supply of electrical energy in the coffee processing process of the Parque Tecnológico del Café-TECNICAFÉ-SUPRACAFÉ, Cauca, Colombia. A hardware prototype with free software was designed on an Arduino board with a microcontroller capable of measuring the irradiance, power, and thermal response of each solar panel, and the energy generated with both types of installations (parallel and serial) was calculated. Voltage, electric current and temperature data were stored in the micro SD module of the card and then plotted as power delivery characteristic curves. The Results suggest the existence of a direct relationship between the power delivered by the panels and the irradiance variable. The polycrystalline panels delivered higher power than the amorphous ones, reporting a practical efficiency of 11% and 4.8% respectively. Conclusion. The design achieved in this research represents an opportunity to improve the energy performance of the coffee sector. [ABSTRACT FROM AUTHOR]

Este artigo propõe uma análise comparativa em termos da potência ativa e não-ativa processada entre dois conversores CC–CC H-bridge/push–pull configurados como reguladores série abaixadores/elevadores de tensão em sistemas fotovoltaicos (FV), os quais possibilitam a realização do processamento parcial de potência (PPP). Estes reguladores são o full-bridge phase-shift/push–pull alimentado em corrente (FBPS/CFPP) e o conversor proposto, o half-bridge simétrico/push–pull alimentado em corrente (SHB/CFPP). Para avaliar o processamento de potência, utiliza-se um procedimento baseado na teoria de Fryze das potências. Com base na faixa de regulação de tensão e na análise da potência processada, demonstra-se que o FBPS/CFPP e o SHB/CFPP adquirem a capacidade de realizar o PPP mediante a otimização da relação de espiras dos transformadores, sendo que o SHB/CFPP alcança o menor processamento ponderado de potência não-ativa, em razão de a modulação phase-shift utilizada pelo FBPS/CFPP produzir uma potência processada maior nesta aplicação FV. Para validar as abordagens, três protótipos de 2200 W foram construídos e ensaiados. Os resultados experimentais comprovam que a redução da potência ativa e não-ativa processada resulta em maiores eficiências.

La estimación de la radiación solar es fundamental para quienes participan en la planificación de granjas de energía solar, ya sean aisladas o conectadas a las redes de distribución eléctrica. Esto para el aprovechamiento de las fuentes de energía renovables, reducir el impacto producido por el cambio climático, e incrementar los índices de cobertura en el servicio eléctrico. De igual manera, el número de estaciones de medición existentes es insuficiente para cubrir toda la geografía de una región, y muchas de ellas no están capturando datos de radiación solar. Por consiguiente, es importante hacer uso de modelos matemáticos, estadísticos y de inteligencia artificial que permitan predecir la radiación solar a partir de datos meteorológicos disponibles. En este trabajo se utilizaron conjuntos de datos tomados de estaciones de medición ubicadas en las ciudades de Cali y Villavicencio, además de un conjunto de datos generado por la API World Weather Online para la ciudad de Mocoa. La razón fue realizar estimaciones de radiación solar utilizando distintas técnicas de aprendizaje automático para regresión y clasificación; el principal objetivo fue evaluar su desempeño. Aunque en la mayoría de los trabajos relacionados los investigadores utilizaron el aprendizaje profundo para la predicción de la radiación solar, este estudio demostró que, si bien las redes neuronales artificiales son la técnica más utilizada, otros algoritmos de aprendizaje automático como Random Forest, Máquinas de Soporte Vectorial y AdaBoost también proporcionan estimaciones con suficiente precisión para ser utilizados en este campo de estudio.

La vida sobre la Tierra depende de la luz solar. El sol de manera directa o indirecta es la fuente de energía de la que derivan todas las demás. La fotosíntesis es el proceso por el cual las plantas verdes y ciertas algas y bacterias toman dióxido de carbono, agua y luz y transforman todo ello en oxígeno y azúcares. De esta manera la energía solar, se convierte en energía química, fijando el carbono en compuestos orgánicos. Este proceso resulta la fuente de inspiración para la energía fotovoltaica. Los sistemas solares fotovoltaicos convierten la luz solar directamente en electricidad, sin producir emisiones ni ruidos. En estos sistemas se “usa” un recurso sin agotarlo, sin afectar su calidad ni cantidad para las generaciones futuras. Su relevancia para la tecnología de la arquitectura está dada por su alto nivel de posibilidades de integración edilicia, siendo actualmente un desafío de diseño. El ser humano desde sus inicios, basó sus innovaciones tecnológicas en la observación de la naturaleza que le ha dado tanto los recursos materiales como la inspiración para resolver sus necesidades de cobijo y protección, que con el paso del tiempo se fueron complejizando aumentando los requerimientos de confort. La biomimética, como disciplina del diseño, es una rama de la ciencia que le aporta al hombre un método para resolver problemas. Permite aprender de las formas y procesos naturales, propiciando la creación o adecuación de soluciones tecnológicas cada vez más sostenibles y ambientalmente más conscientes. Ésta es de carácter eminentemente interdisciplinaria, dado que para comprender la naturaleza el método de abordaje debe ser holístico. El presente artículo analiza la energía solar fotovoltaica como un proceso bio-inspirado y ambientalmente sustentable, que resulta un desafío para la innovación y el diseño tecnológico arquitectónico. Para ello se analizan casos de edificios que integran la energía solar fotovoltaica como mecanismo de generación de energía.

Copyright of Journal Electrical Engineering / Revista de Ingenieri´a Ele´ctrica is the property of ECORFAN-Mexico S.C. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Espacios is the property of Talleres de Impresos Oma and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article analyzes the prospects of economic viability of installing photovoltaic systems connected to the network in homes of the city of Arica (Chile). Installation would allow residents to generate an additional income source by selling electricity surpluses while saving on electricity consumption and reducing CO2 emissions. The proposed methodology is based on the characterization of the average house in the city of Arica and on the subsequent dimensioning and profitability analysis of the photovoltaic system to be installed. This includes the economic, technical, legal, and environmental aspects related to the installation of photovoltaic systems. The results show that photovoltaic systems were profitable in the Arica homes included in this study. In conclusion, the implementation of photovoltaic systems as a source of distributed power generation is a viable project in Arica homes. [ABSTRACT FROM AUTHOR]

Este artículo, muestra la implementación de una interfaz gráfica desarrollada en MATLAB para el dimensionamiento de los principales componentes de un sistema fotovoltaico, sea conectado a la red como autónomo. El primer paso consiste en el cálculo de la cantidad de paneles requeridos para cierta demanda de energía y para ciertas variaciones que dependen del sistema y de los niveles de radiación solar en la zona, seguidamente se dimensiona el banco de baterías -para el caso de los sistemas autónomos (off-grid)-, posteriormente se dimensionan los inversores y los reguladores de carga -en caso de tener banco de baterías-. Por último, la interfaz muestra una tabla de resumen con la cantidad de elementos a utilizar, así como las características eléctricas nominales de estos.

Copyright of Revista Facultad de Ingeniería - UPTC is the property of Universidad Pedagogica y Tecnologica de Colombia, Facultad de Ingenieria and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Competitividade e Sustentabilidade - ComSus is the property of Universidade Estadual do Oeste do Parana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The world is living in a new technological phase and conventional energy sources are not sufficient to maintain the ongoing process. Alternative sources are required that supplement energy matrixes. They should focus on clean production and on sustainability. Within current chaotic environmental degradation, the term sustainability becomes a keyword for the development of companies. It is more than a competitive differential factor to be incorporated to the philosophy of firms. It is actually a question of organizational survival. Northeastern Brazil is characterized by high solar incidence that generates several energy sources. The Universidade Federal do Vale do São Francisco (UNIVASF), campus Juazeiro (BA), a recently-founded institution, with several engineering courses, has become a source for regional development. It has generated employment and earning in the region of the Vale do São Francisco, and has trained highly qualified professionals in different areas. Current paper deals with a technical and economic analysis of the use of solar energy with the photovoltaic system in UNIVASF, campus Juazeiro, supplying all energy demands. Results show the technical and economic viability at medium term, with environmental, social and economic benefits for the institution and the region. [ABSTRACT FROM AUTHOR]