EM - Escola de Minas

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Evaluation of the energy transition in the process of renewable sources expansion - a case study.
(2021) Anjos, Morjana Moreira dos; Costa, Antonella Lombardi; Pereira, Elizabeth Marques Duarte; Moura, Gustavo Nikolaus Pinto de
Considering the risks related to energy security and the challenges posed by climate change, this work presents a methodology to investigate energy alternatives to promote an adequate energy transition. Such methodology was applied to a case study, modelling the energy system of the Brazilian State of Minas Gerais to subsidize an energy transition with a view to expanding renewable energies and promoting energy efficiency at the state and municipal levels, as well as combating climate change. Projections, in the 2030-2050 horizon, were made using the tool Long-range Energy Alternatives Planning System (LEAP) to establish a model of energy transition policy for Minas Gerais State. The modelling considered key assumptions based on historical data of demographic and economic origin, which subsidized the elaboration of three scenarios, being a Reference Scenario (REF), a Moderate Energy Transition Scenario (ETM) that aims to contribute to the energy sector goals of the Brazilian NationallyDetermined Contributions – NDC, and an Advanced Energy Transition Scenario (ETA) that goes beyond of NDC's goals. The analysis has shown that current policies are not sufficient to promote the state transition to sustainable energy systems and that this process will depend on the energy policies initiated and implemented in the near future.
Using biogas produced in landfill for electricity generation in a Brazilian state to a horizon of 2050.
(2018) Ferreira, Wemerson Rocha; Costa, Antonella Lombardi; Flausino, Bruna de Fátima Pedrosa Guedes
Generally, urbanization processes occur in a disorderly way, especially in developing countries, and are characterized as one of the most aggressive human interaction with the environment. In the State of Minas Gerais, which consists of 853 municipalities organized in 17 Development Territories, approximately 85.3% of the population live in urban areas, evidencing the need for a good management of energy resources and an adequate disposal of Municipal Solid Waste (MSW). In this context, one feasible possibility is the use of biogas from landfills, which aggregates solutions for both MSW management and electricity generation, as it is being analysed in this work. The methodology proposed by the Intergovernmental Panel on Climate Change was used, which is generally based on population expansion in urban areas, as well as the rate of MSW per capita, considering the different arrangements of gravimetric composition. Next, the potential of electricity generation was presented considering the energy conversion efficiencies of four technological routes. The results showed that the use of motors as energy conversion technology presents the greatest technical feasibility for the implementation of such projects, reaching theoretical values of generation of up to 2,237.06 MWh / day in 2050.
Potential of the bagasse sugarcane to electric power generation.
(2015) Flausino, Bruna de Fátima Pedrosa Guedes; Costa, Antonella Lombardi; Pinheiro, Ricardo B.; Fortini, Angela
An important renewable sources in the Brazilian energy matrix is the biomass, which is all organic matter, either animal or vegetable origin, used to produce energy such as is the case of the sugarcane bagasse. The bagasse is the fibrous residue after the sugarcane (Saccharum officinarum) harvest and the extraction of its juice. The excess of electricity generated in industries through the sugarcane bagasse burning can be exported to the electricity grid in a process of cogeneration. This work presents the potentiality of bagasse sugarcane in such important process in Brazil.

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