Base de dados : LILACS
Pesquisa : N06.230.132.644 [Categoria DeCS]
Referências encontradas : 25 [refinar]
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Id: biblio-1025045
Autor: Solarte-Toro, Juan Camilo; Chacón-Pérez, Yessica; Cardona-Alzate, Carlos Ariel.
Título: Evaluation of biogas and syngas as energy vectors for heat and power generation using lignocellulosic biomass as raw material
Fonte: Electron. j. biotechnol;33:52-62, May. 2018. tab, ilus.
Idioma: en.
Projeto: Departamento Administrativo de Ciencia, Tecnología e Innovación.
Resumo: The use of nonrenewable energy sources to provide the worldwide energy needs has caused different problems such as global warming, water pollution, and smog production. In this sense, lignocellulosic biomass has been postulated as a renewable energy source able to produce energy carriers that can cover this energy demand. Biogas and syngas are two energy vectors that have been suggested to generate heat and power through their use in cogeneration systems. Therefore, the aim of this review is to develop a comparison between these energy vectors considering their main features based on literature reports. In addition, a techno-economic and energy assessment of the heat and power generation using these vectors as energy sources is performed. If lignocellulosic biomass is used as raw material, biogas is more commonly used for cogeneration purposes than syngas. However, syngas from biomass gasification has a great potential to be employed as a chemical platform in the production of value-added products. Moreover, the investment costs to generate heat and power from lignocellulosic materials using the anaerobic digestion technology are higher than those using the gasification technology. As a conclusion, it was evidenced that upgraded biogas has a higher potential to produce heat and power than syngas. Nevertheless, the implementation of both energy vectors into the energy market is important to cover the increasing worldwide energy demand.
Descritores: Biocombustíveis/análise
Lignina/metabolismo
-Centrais Elétricas
Digestão Anaeróbia
Biomassa
Energia Renovável
Temperatura Alta
Lignina/química
Metano
Tipo de Publ: Revisão
Responsável: CL1.1 - Biblioteca Central


  2 / 25 LILACS  
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Texto completo SciELO Brasil
Texto completo
Id: biblio-1285561
Autor: Pessoa, Diego Rodrigues; Colla, Débora Cristina; Costa, Bill Jorge.
Título: Potential of Alternative Sources for Electric Power Generation in the State of Paraná
Fonte: Braz. arch. biol. technol;64(spe):e21200734, 2021. tab, graf.
Idioma: en.
Resumo: Abstract The State of Paraná stands out in Brazil for its hydraulic potential for electricity generation. Furthermore, the State also shows potential for the use of other sources of energy, such as solar energy, biogas and biomass. The study traces the profile of electric energy consumption and compiles analysis of the alternative energy potentials of Paraná on the use of solar energy, the biomass of forest residues and agricultural crops, the generation of biogas through the residues of farmed animals and the urban solids residues. The work took account for the estimates, the logistical limitations for the biomass or biogas collection and the real availability of the wastes in terms of viability of exploration through distributed generation plants. The use of the business analytics software Tableau Desktop 2020.3.2® made possible the open data analysis at the municipal level. The paper provides realistic estimates about the feasibility of the use of alternative energy sources in the State of Paraná.
Descritores: Fontes Geradoras de Energia
Energia Renovável
-Brasil
Análise de Dados
Responsável: BR1.1 - BIREME


  3 / 25 LILACS  
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Texto completo
Id: biblio-1285564
Autor: Perez, Filipe; López-Salamanca, Henry Leonardo; Medeiros, Lúcio de; Schumacher, Ricardo; Fuchs, Leonardo; Roesler, Pedro Henrique; Pedretti, André.
Título: Optimal Operation of an Urban Microgrid Using Model Predictive Control Considering Power Quality Improvements
Fonte: Braz. arch. biol. technol;64(spe):e21210156, 2021. tab, graf.
Idioma: en.
Projeto: Companhia Paranaense de Energia.
Resumo: Abstract Microgrids have been widely applied to improve the energy quality parameters of a distribution system locally, in addition to ensuring the operation of the system in an isolated manner. The Model Predictive Control (MPC) is a great solution to guarantee the operation of the system considering forecasting models and also physical restrictions of the system, which ensure the optimal operation of the Microgrid. However, the construction of a control scheme following the objectives established in order to meet the connected and isolated operation of a Microgrid is still a challenge. This paper proposes the development of an MPC control scheme that assures optimal system operation in connected and islanded mode, improving power quality indexes, ensuring network requirements, and extending battery life cycle. The proposed control operation in the connected mode can attend to the needs of the Microgrid, reducing the impacts of peak demand and the intermittent variations in renewable generation, where a linear objective function is developed for this purpose. In the islanded mode, grid requirements are guaranteed through load shedding, considering improvements in continuity indicators. Forecasting models are implemented considering the MPC approach and a detailed network model is developed. Simulation results highlight the effectiveness of the proposed control strategy.
Descritores: Controle de Qualidade
Instalação Elétrica/normas
-Baterias
Energia Renovável
Responsável: BR1.1 - BIREME


  4 / 25 LILACS  
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Texto completo SciELO Brasil
Texto completo
Id: biblio-1055428
Autor: Pepplow, Luiz Amilton; Silva, Vander Luiz da; Betini, Roberto C; Pereira, Thulio C. G.
Título: Evaluation of Global Heating Reduction Potential with the Replacement of Electricity Supplied by the Local Concessionaire Via Solar Renewable Source
Fonte: Braz. arch. biol. technol;62(spe):e19190003, 2019. tab, graf.
Idioma: en.
Projeto: COPEL-DIS.
Resumo: Abstract The objective of this paper is to evaluate, through the 100-year Life Cycle Analysis, Global Warming Potential (GWP) and Global Temperature Increasing Potential (GTP) impact categories. It is proposed scenario of replacement of the energy matrix for the supply of electricity by Solar Photovoltaic, adopting as consumption base the facilities of Supermarkets, as they contribute to environmental impacts for greenhouse gas emissions such as: intensive use of electricity, occupation large areas such as the main building or parking lot sealing the ground, the movement of customers' vehicles with air and noise pollution and the use of plastic bags. Modifying the energy matrix using electricity from renewable sources enables the reduction of greenhouse gas emissions. According to proposed scenarios for the composition of the energy matrix, based on the emission values of the Concessionaire's matrix, the result of the analysis confirms the premise that the use of renewable sources contributes to the reduction of environmental impacts, and that the substitution of Concessionaire's energy matrix for Photovoltaic Solar Energy represents a reduction in terms of kgCO2-eq, over the 100-year horizon, of 85% for GTP and 86% for GWP.
Descritores: Meio Ambiente
Energia Fotovoltaica
Aquecimento Global/prevenção & controle
Energia Renovável
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


  5 / 25 LILACS  
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Texto completo
Id: biblio-1055433
Autor: Batista, Alexandre G; Betini, Roberto C; Bareta, Maria Luiza E; Sandim, Álvaro A; Pepplow, Luiz A.
Título: Public Policies to Be Implemented to Encourage the Use of Renewable Energy Sources in the Rural Area of Paraná
Fonte: Braz. arch. biol. technol;62(spe):e19190020, 2019.
Idioma: en.
Resumo: Abstract Around the world there's a rising interest in the installation of renewable energy sources due to their ecological, economical, political and social advantages. In this article is studied specifically the case of the incentive towards the installation of these sources in the state of Parana's rural area, where they wouldn't just be ecologically interesting, but also would help the improvement on the living conditions of the rural producers, promote income distribution and would cause an increase on the power supply, this way reducing the tariff. However, the problem arises in the acquisition of the energy generator, since even though they are interesting for the rural producers, these sources are majorly too expensive and end up being beyond their purchasing power. Based on that, this article brings a selection of public policies that could make the use of these sources viable in the rural area of the state, based on the experiences of other countries who face or have faced in the past similar difficulties, like China or India, and countries who have become reference in the matter, like Germany.
Descritores: Política Pública
Energia Renovável
-Brasil
Zona Rural
Eletricidade
Responsável: BR1.1 - BIREME


  6 / 25 LILACS  
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Texto completo
Id: biblio-1055441
Autor: Bareta, Maria Luiza E; Sandim, Álvaro A; Batista, Alexandre G; Betini, Roberto C; Pepplow, Luiz A.
Título: Integration of Renewable Energy Sources to Operate in Microgrids in Rural Zones in Brazil
Fonte: Braz. arch. biol. technol;62(spe):e19190019, 2019. graf.
Idioma: en.
Resumo: Abstract In a world where technology is even more essential, quality and reliability of electrical system are fundamental. In Brazil, country where most of the energy is produced thought power plants, the existing distribution network is overwhelmed and the needs for the consolidation of distributed generation is growing. Wind and Solar power generation from biomass and another renewable sources are one alternative to power plants, which requires large areas and massive investment. The renewable energy sources mentioned may be assembled in a way to generate reliable energy to properties far from the cities, such as rural zones, where often energy from power plants doesn't gets to. Distributed generation allows quick development of Brazilian farming and guarantees to the farmer independence from the energy dealerships. Microgrids assembled with renewable sources are one sustainable option and benefits Brazilian economy and society.
Descritores: Biomassa
Eletricidade
Energia Renovável
-Zona Rural
Agricultura Sustentável
Responsável: BR1.1 - BIREME


  7 / 25 LILACS  
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Id: biblio-1100925
Autor: Mariano, Juliana D'Angela; Urbanetz Junior, Jair.
Título: State of the Art of the Application of Energy Storage Systems in Photovoltaic Buildings
Fonte: Braz. arch. biol. technol;62(spe):e19190023, 2019. graf.
Idioma: en.
Projeto: COPEL-DIS.
Resumo: Abstract Photovoltaic (PV) buildings are increasingly present in urban centers and can generate their own energy becoming independent of the grid, depending on their consumption profile. However, most residential and commercial consumers show their peak demand at night, when there is no photovoltaic generation, needing the electricity grid to meet the demand of these facilities. Peak demand lead to increased costs for these consumers and end up disrupting the power quality of the grid. One possible solution for these listed problems is by applying storage systems to these buildings, which is already being done in some countries and can increase the PV generation. Aiming to seek the state of the art of these systems, this article brings a review of the literature, highlighting the possible modes of operation and a real case of application in PV buildings in the world. Also are described the storage technologies most appropriate for applications in these buildings, highlighting their advantages and disadvantages. It is expected to gain greater knowledge of these systems, in order to overcome the challenges of intermittence generated by renewable sources, enabling the reduction of energy demand costs in these customers so that it can also be applied in the Brazilian scenario.
Descritores: Abastecimento de Energia/métodos
-Consumo de Energia
Energia Fotovoltaica/métodos
Energia Renovável
Responsável: BR1.1 - BIREME


  8 / 25 LILACS  
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Id: biblio-1132153
Autor: Schreiber, Marcos; Medeiros, Lúcio de; Nadal, Zeno L. Iensen; Valente, Solivan A.
Título: Demand Manager for Energy Consumer with Local Storage and Microgeneration
Fonte: Braz. arch. biol. technol;62(spe):e19190024, 2019. graf.
Idioma: en.
Projeto: LACTEC Institutes; . COPEL Distribuição S.A..
Resumo: Abstract The current reality of the energy market requires generation, control, distribution and consumption to become more efficient. Recent arrangements with electric energy stored in accumulators appear as strategic tools in the environment where the cost of energy supplied by the concessionaires and permission holders has accumulated successive increases, indirectly enabling the control and management of applications of micro or local minigeneration, from renewable sources in general. Systems with energy storage (e.g. batteries) and local demand management (many consumer units) achieve great efficiency by allowing the optimized consumption of the available energy, both by the local power grid and by the accumulated grid. Other advantages are presented for the distributors, allowing the relief of the electricity network, remunerating the investment in reduced intervals of time. Consideration should be given to the possibility of local autonomy, even if partially, by providing energy from the storage to the local loads in eventual failures in the supply of energy by the distribution network or at times where supply has a higher cost.
Descritores: Autonomia Profissional
Fontes Geradoras de Energia
Abastecimento de Energia/métodos
Energia Renovável
Responsável: BR1.1 - BIREME


  9 / 25 LILACS  
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Texto completo
Id: biblio-1278460
Autor: Brito, Marcos Lapa; Maraes, Caetano; Santos, Luiz Carlos Lobato dos; Simonelli, George.
Título: Energy Self-Sufficiency Conditions of Ethanol Autothermal Reforming: a Simulation Study
Fonte: Braz. arch. biol. technol;64(spe):e21200045, 2021. tab, graf.
Idioma: en.
Projeto: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.
Resumo: Abstract Natural gas steam reforming is commonly used for hydrogen production. However, research has shown that ethanol autothermal reforming can produce cleaner hydrogen gas efficiently. Despite this, there is a lack of studies on the energy self-sufficiency conditions of the ethanol autothermal reform. In this paper, we use simulations and the Response Surface Methodology (RSM) for the multivariate analysis of the energy self-sufficiency conditions in this process. First, we constructed and validated an industrial flowchart. After that, RSM allowed us to assess the process variables effects. The process variables studied were temperature (0 to 1000 ºC), pressure (20 to 30 bar), steam/ethanol ratio (2 to 5 mol/mol) and O2/ethanol ratio (0 to 1.5 mol/mol). We observe that the temperature and steam/ethanol ratio increase have a positive effect on hydrogen production. On the contrary, the O2/ethanol ratio increase has a negative effect, and the pressure increase is not statistically significant on hydrogen production. Therefore, the pressure was used at its minimum level (20 bar) while the temperature and the steam/ethanol ratio at its maximum levels (1000 ºC and 5 mol/mol). We also evaluated the energy consumption for the Autothermal Reactor (ATR). The reactor consumed 477.92 kJ/mol ethanol to produce 5.12 mol H2/mol ethanol when we use 1000 ºC, 20 bar, steam/ethanol 5 mol/mol, and O2/ethanol 0 mol/mol. ATR's energy self-sufficiency is achieved by using 1000 ºC, 20 bar, steam/ethanol 5 mol/mol, and O2/ethanol 0.86 mol/mol. In these conditions, 3.95 mol H2/mol ethanol is produced with 0 kJ/mol ethanol.
Descritores: Etanol
Gás Natural
Energia Renovável
Hidrogênio
-Simulação
Modelos Anatômicos
Responsável: BR1.1 - BIREME


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Texto completo SciELO Chile
Texto completo
Id: biblio-950788
Autor: Chen, Peng; Wang, Yuxia; Yan, Lei; Wang, Yiqing; Li, Suyue; Yan, Xiaojuan; Wang, Ningbo; Liang, Ning; Li, Hongyu.
Título: Feasibility of biohydrogen production from industrial wastes using defined microbial co-culture
Fonte: Biol. Res;48:1-8, 2015. ilus, graf, tab.
Idioma: en.
Projeto: Gansu Province Science Foundation for Distinguished Young Scholars; . Longyuan Support Project for Young Creative Talents; . Technology Program of Gansu Province; . Technology Program of Lanzhou City; . NationalNaturalScience Foundation of China.
Resumo: BACKGROUND: The development of clean or novel alternative energy has become a global trend that will shape the future of energy. In the present study, 3 microbial strains with different oxygen requirements, including Clostridium acetobutylicum ATCC 824, Enterobacter cloacae ATCC 13047 and Kluyveromyces marxianus 15D, were used to construct a hydrogen production system that was composed of a mixed aerobic-facultative anaerobic-anaerobic consortium. The effects of metal ions, organic acids and carbohydrate substrates on this system were analyzed and compared using electrochemical and kinetic assays. It was then tested using small-scale experiments to evaluate its ability to convert starch in 5 L of organic wastewater into hydrogen. For the one-step biohydrogen production experiment, H1 medium (nutrient broth and potato dextrose broth) was mixed directly with GAM broth to generate H2 medium (H1 medium and GAM broth). Finally, Clostridium acetobutylicum ATCC 824, Enterobacter cloacae ATCC 13047 and Kluyveromyces marxianus 15D of three species microbial co-culture to produce hydrogen under anaerobic conditions. For the two-step biohydrogen production experiment, the H1 medium, after cultured the microbial strains Enterobacter cloacae ATCC 13047 and Kluyveromyces marxianus 15D, was centrifuged to remove the microbial cells and then mixed with GAM broth (H2 medium). Afterward, the bacterial strain Clostridium acetobutylicum ATCC 824 was inoculated into the H2 medium to produce hydrogen by anaerobic fermentation. RESULTS: The experimental results demonstrated that the optimum conditions for the small-scale fermentative hydrogen production system were at pH 7.0, 35°C, a mixed medium, including H1 medium and H2 medium with 0.50 mol/L ferrous chloride, 0.50 mol/L magnesium sulfate, 0.50 mol/L potassium chloride, 1% w/v citric acid, 5% w/v fructose and 5% w/v glucose. The overall hydrogen production efficiency in the shake flask fermentation group was 33.7 mL/h-1.L-1, and those the two-step and the one-step processes of the small-scale fermentative hydrogen production system were 41.2 mLVh-1.L-1 and 35.1 mL/h-1.L-1, respectively. CONCLUSION: Therefore, the results indicate that the hydrogen production efficiency of the two-step process is higher than that of the one-step process.
Descritores: Fermentação/fisiologia
Consórcios Microbianos/fisiologia
Hidrogênio/metabolismo
Resíduos Industriais
-Amido/metabolismo
Fatores de Tempo
Kluyveromyces/metabolismo
Ácidos Carboxílicos/metabolismo
Estudos de Viabilidade
Enterobacter cloacae/metabolismo
Técnicas de Cocultura
Clostridium acetobutylicum/metabolismo
Condutividade Elétrica
Interações Microbianas/fisiologia
Energia Renovável
Águas Residuárias/análise
Hidrogênio/análise
Íons/metabolismo
Metais/metabolismo
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: CL1.1 - Biblioteca Central



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