Modelo de dimensionamento otimizado para sistemas energéticos renováveis em ambientes rurais

Abstract

RESUMO:Este trabalho teve por objetivo o desenvolvimento de novo modelo para dimensionamento de sistemas integrados de recursos energéticos renováveis, aplicados a ambientes rurais, a partir da utilização de ferramentas de simulação e otimização desenvolvidas em MATLAB 6.0. O dimensionamento realizado apresenta custo mínimo e atende a determinado nível de confiabilidade desejado para o sistema, baseado no conceito de probabilidade de perda de fornecimento de energia à carga (LPSP) para horas consecutivas. Um modelo de otimização é apresentado e três diferentes cenários de dimensionamento são calculados e comparados, mostrando a flexibilidade na elaboração de diferentes concepções de projeto. Os resultados obtidos contemplam o dimensionamento completo dos dispositivos de conversão energética e análise de custos do sistema. PALAVRAS-CHAVE:recurso renovável, metodologia de dimensionamento, modelo de otimização. OPTIMIZED SIZING MODEL FOR RENEWABLE ENERGY SYSTEMS IN RURAL AREASABSTRACT: The purpose of this research was to develop a methodology for sizing integrated renewable energy systems, useful for rural areas, using simulation and optimization tools developed in MATLAB 6.0. The sizing model produces a system with minimum cost and high reliability level, based on the concept of loss of power supply probability (LPSP) for consecutive hours. An optimization model is presented and three different sizing scenarios are calculated and compared, showing flexibility in the elaboration of different project conceptions. The obtained results show a complete sizing of the energy conversion devices and a long-term cost evaluation.

Performance of small wind turbines: simulation of electricity supply to loads connected to the public or isolated grid

“…The option of optimized isolated wind system with batteries (without photovoltaic) was using four SWT s of 0.6kW and 7 battery of 1.92kWh each, with the COE assessed at R$1,048/kWh, 2.63 times lower than the lowest COE rated in this work (Roscoe, national wind turbine). NOGUEIRA & ZURN (2005) implemented algorithm for the design of hybrid systems for electricity generation based on the probability of supply loss. The hybrid system consists of a small hydroelectric power plant from 2.8kW to 3kW and from three to four SWT and the cost ranged from US$0.13/kWh to US$0.158/kWh, which is between 8 and 9 times lower than the cost estimated in this work (Roscoe, national wind turbine).…”

“…Given the wide applicability of SWT in various regions of the world (KUSAKUNA & VERMAAK, 2013a;KUSAKUNA & VERMAAK, 2013b;SIMIC et al, 2013;NOGUEIRA et al, 2014;AL-FATLAWI et al, 2014;NOGUEIRA & ZURN, 2005), the aim of this study was to evaluate the technical and economic feasibility of installing two small wind turbine with horizontal axis of power ratings 6kW and 5kW, considering wind resource in three different cities. The computer program Homer was used to simulate a wind system connected to the public power grid and an isolated wind system with batteries for storage, comparing the two wind turbines regarding the electric power production performance and the generation costs associated.…”

Viabilidade técnica e econômica da substituição de fontes convencionais de energia por biogás em assentamento rural do Estado de São Paulo

“…Os materiais usados na construção do biodigestor foram considerados itens depreciáveis. Como a vida útil de um biodigestor de alvenaria é bastante longa, para fins de determinação do rateio dos custos de implantação ao longo do tempo, foi considerado o valor de 20 anos, conforme indicado por NOGUEIRA & ZÜRN (2005). Dessa forma, a depreciação resulta em R$ 363,00 anuais.…”

Quali-Quantitative study of biogas production from bio-digestion of cutting poultry

“…They use it for cooking and home lighting in rural areas, including having their own biodigester model, with multiple working units installed (Nogueira and Zürn, 2005). In 1996, Brazil started studying the electric energy production using biogas and also in a more intensive way.…”