Navegando por Assunto "Sistema fotovoltaico"

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Acesso aberto (Open Access)
Análise energética, exergética e tecnoeconômica de um sistema de condicionamento de ar baseado na regulação natural da energia solar em condições climáticas da Amazônia
(Universidade Federal do Pará, 2023-09-01) SANTOS, Elson Costa dos; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088
This work investigates the behavior of a photovoltaic air conditioning system, without batteries or connection to the electrical grid, operating according to the natural regulation of solar energy, in climatic conditions in the Amazon, a region with significant energy challenges, where in many locations, children, adolescents, adults and the elderly live without one of the main inputs for the development of productive, educational, leisure and even subsistence activities. The simulation results indicate that a system powered by a 1400 Wp photovoltaic generator can maintain thermal comfort conditions, with temperatures between 20 °C and 26 °C and relative humidity between 40% and 80%, for almost half of the operating time. and without any active control. Exergy analyses reveal variations in efficiency and irreversibility of components throughout the day, with the greatest impact on the photovoltaic system, followed by the compressor, condenser, evaporator, and expansion valve. Furthermore, the economic analysis shows that the implementation of these systems in parallel to systems powered by the conventional electrical grid can reduce grid energy consumption by 60.76%, and is strongly related to the tariff charged by the energy concessionaire. Finally, the research demonstrates the use of photovoltaic air conditioning systems as a sustainable solution for cooling, showing its effectiveness with the natural regulation of solar energy and its economic contribution to reducing the consumption of non-renewable energy
Acesso aberto (Open Access)
Gestão de armazenamento de energia integrado com fontes renováveis e intermitentes
(Universidade Federal do Pará, 2023-07-13) MORAES, Wuanda Letícia da; BEZERRA, Ubiratan Holanda; http://lattes.cnpq.br/6542769654042813
This work address the configuration of energy storage integrated to intermittent renewable sources, especially photovoltaic systems, connected to the electricity distribution network. This is the result of the Research and Development Project, “Multimodal Electric Mobility Intelligent System (R&D) Applied in the Amazon Region (SIMA)”, developed at the Amazon Energy Efficiency Center (CEAMAZON), where there is a mini electric network with photovoltaic generation, diesel generation, electric vehicles charging stations, energy storage and coupling point with the CA network of the university city Prof. Dr. José da Silveira Netto, of Federal University of Pará. The mini electric network management is accomplished by a hybrid inverter associated with a load controller, capable of informing and managing the power that is being generated by the FV arrangements, the charging state of the battery bank, which also has its own management, through the BMS (Battery Management System); and the power being injected into the AC bus. With the case study, management strategies were defined through demand-side energy management, time shift, with a 55% reduction in the total cost of the 2022 annual bill for the CEAMAZON building. In addition, an economic feasibility analysis was presented through the tip load factor (FCp) with PDE 2032 VLP , arriving at a positive and justifiable result for application. Finally, a carbon exchange analysis arrived at a sustainability equivalent of 11 trees typical of the Amazon rainforest cultivated for the total emissions avoided in 2022 in the university city; and a carbon credit 298.43 tCO2, corresponding to R$ 131,902.4 for the carbon market.