Article
Chemistry, Physical
Eduardo Coutino-Gonzalez, Mario Avila-Gutierrez, Arnold Hernandez-Palomares, Lilian Olvera, Francisco J. Rodriguez-Valadez, Fabricio Espejel-Ayala
Summary: A facile and versatile process to produce lithium metasilicate from non-conventional silicon sources was developed, and it was used as a catalyst for biodiesel production, displaying better chemical stability.
Article
Engineering, Electrical & Electronic
Hercules Araujo Oliveira, Jose Gomes de Matos, Luiz Antonio de Souza Ribeiro, Osvaldo Ronald Saavedra, Alexandre de Andrade Lorencato, Alexandre Saccol Martins, Lucas de Paula Assuncao Pinheiro
Summary: The study proposes a solution to avoid generator oversizing by using resonant filters, notch filter and a capacitive reactive compensation circuit, which has been successfully used in two real-life microgrids, reducing the installation and operation costs.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Green & Sustainable Science & Technology
Vadim A. Golubev, Viktoria A. Verbnikova, Ilia A. Lopyrev, Daria D. Voznesenskaya, Rashid N. Alimov, Olga V. Novikova, Evgenii A. Konnikov
Summary: The development of world's electric power systems has a long history, with most countries forming stable centralized systems. Renewable energy sources are rapidly expanding, but integrating them into traditional systems is resource-intensive. The purpose of this study is to create a forecasting model for the development of NCRES and form an action plan to ensure reliable supplying of consumers.
Article
Food Science & Technology
Bruna Lago Tagliapietra, Maria Herminia Ferrari Felisberto, Edgar Aparecido Sanches, Pedro Henrique Campelo, Maria Teresa Pedrosa Silva Clerici
Summary: The review on nonconventional starches reveals a variety of new sources with unique characteristics, but there is limited research on their technological applications. Traditional methodologies for commercial starches need to be adapted for these new sources.
CURRENT OPINION IN FOOD SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
Louis Polleux, Gilles Guerassimoff, Jean-Paul Marmorat, John Sandoval-Moreno, Thierry Schuhler
Summary: This study provides an overview of the challenges in reducing carbon emissions and electricity costs in industry and presents the characteristics and conceptual definition of reliability-constrained microgrids. The study reviews the challenges of accounting for the dynamical behavior of fossil equipment, PV, and storage systems, and introduces applicable control strategies.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Green & Sustainable Science & Technology
Chitaranjan Phurailatpam, Zakir Hussain Rather, Behrooz Bahrani, Suryanarayana Doolla
Summary: This paper proposes a comprehensive method to estimate non-synchronous inertia in an AC microgrid system by analyzing frequency transients, using a multi-step approach and system identification studies to improve the accuracy of the estimate.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2021)
Article
Computer Science, Artificial Intelligence
M. Talaat, M. H. Elkholy, Adel Alblawi, Taghreed Said
Summary: This paper provides a comprehensive review of the integration of renewable energy sources (RESs), including various combinations of integrated systems, integration schemes, integration requirements, microgrid communication challenges, as well as the use of artificial intelligence in the integration. It also discusses optimization techniques to reduce the total cost of integrated energy sources and up-to-date methods to improve the performance of the electrical grid. A case study demonstrates that the use of artificial intelligence improves the accuracy of operation and enables effective and accurate prediction control of the integrated system. Various optimization techniques combined with ANN are used to select the best hybrid model, with PSO showing a fast convergence rate and reaching a minimum error of 1.10% in 3367.50 seconds.
ARTIFICIAL INTELLIGENCE REVIEW
(2023)
Article
Engineering, Electrical & Electronic
Hossam Ali, Gaber Magdy, Dianguo Xu
Summary: This paper presents a virtual inertia control based on an optimal robust controller, optimized using a chaotic crow search algorithm. The study also introduces a two-area interconnected hybrid microgrid with high penetration levels of renewable energy sources.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Green & Sustainable Science & Technology
Vjatseslav Skiparev, Komeil Nosrati, Aleksei Tepljakov, Eduard Petlenkov, Yoash Levron, Juri Belikov, Josep M. Guerrero
Summary: Reducing system inertia and maintaining frequency at nominal value is crucial for the operation, stability, and resilience of today's and future power systems. We propose a variable fractional-order PID controller for virtual inertia control applications, which is tuned online using a modified neural network-based algorithm. The proposed hybrid algorithm captures all tuning knobs of the discrete type and fully tunable variable FOPID controller, combining classical and advanced techniques. Comparative analysis with standard FOPID and PID controllers demonstrates the effectiveness of the proposed controller under different scenarios involving the connection/disconnection of renewable energy sources and loads.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2023)
Article
Chemistry, Physical
Su Meyra Tatar, Handan Akulker, Hasan Sildir, Erdal Aydin
Summary: The integration of renewable energy into energy grids along with green technologies has become crucial for achieving the goal of limiting global temperature rise to 2 degrees Celsius. However, there is limited research on the optimal design and operation of integrated energy grids considering weather intermittency and demand uncertainty. This study proposes a multi-period mixed-integer linear programming model to address these challenges and comprehensively analyze the intermittent nature of renewable resources.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Energy & Fuels
Jayakumar Narayanaswamy, Srihari Mandava
Summary: The rapid growth of renewable energy and harvesting methods has led to the emergence of multiport power electronic converter circuits for reliable energy output. This paper provides a comprehensive review and analysis of non-isolated multiport converter topologies, offering guidelines for suitable selection of the system.
Article
Computer Science, Information Systems
Juan-Fernando Polanco, Alexis Esparza, Jaspreet Singh, Mario Gonzalez-Rodriguez, Jean-Michel Clairand, Robert Nutter, Peter Dauenhauer
Summary: Rural areas are heavily relying on fossil fuels due to electricity shortages, leading to ecological harm. Microgrids are proposed as a solution, and a web-based system for microgrid planning is developed to analyze optimal configurations accurately. The software tool is validated to ensure data accuracy and expected results.
Article
Chemistry, Multidisciplinary
Ricardo Andres Pardo-Martinez, Jesus M. Lopez-Lezama, Nicolas Munoz-Galeano
Summary: This paper presents a new mixed integer linear programming (MILP) formulation for the generation start-up problem in power system restoration, which integrates non-conventional renewable energy sources (NCRES) and battery energy storage systems (BESS), showing superior performance compared to traditional heuristic and enumerative approaches.
APPLIED SCIENCES-BASEL
(2021)
Review
Green & Sustainable Science & Technology
N. Bekirsky, C. E. Hoicka, M. C. Brisbois, L. Ramirez Camargo
Summary: While the complementarity achieved by combining multiple renewable energy sources (RES) is an important method to increase their shares, it is often overlooked in policy prescriptions and academic literature. This study highlights the need for further research on the involvement of multiple actors and their roles in combinations of multiple RES. Incorporating more context and perspectives can help explore the technical benefits and roles of various actors.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Computer Science, Information Systems
A. Elsawy Khalil, Tarek A. Boghdady, M. H. Alham, Doaa Khalil Ibrahim
Summary: This paper proposes a novel multi-objective tuning strategy to improve the load frequency control of isolated microgrids. The proposed approach tunes the PI and PID controllers using a multi-objective-based tuning approach and applies anti-windup to enhance their performance. The effectiveness of the proposed approach is confirmed through extensive simulations in MATLAB and Simulink.
Article
Energy & Fuels
Cesar Augusto Santana Castelo Branco, Fabricio Pereira Moraes, Hercules Araujo Oliveira, Pedro Bezerra Leite Neto, Osvaldo Ronald Saavedra, Jose Gomes de Matos, Clovis Bosco Mendonca Oliveira, Luiz Antonio de S. Ribeiro, Alexandre Cunha Oliveira, Marcelo Fernado Augusto Junior, Lucas de Paula Assuncao Pinheiro, Rogerio Moreira Cazo
Summary: This article presents the conception and design of a mission critical microgrid for the Alcantara Space Launch Center in Brazil. The study analyzes different operation scenarios and proposes a microgrid that meets the requirements of a critical infrastructure application.
Article
Energy & Fuels
Arcilan T. Assireu, Felipe M. Pimenta, Ramon M. de Freitas, Osvaldo R. Saavedra, Francisco L. A. Neto, Audalio R. Torres Junior, Clovis B. M. Oliveira, Denivaldo C. P. Lopes, Shigeaki L. de Lima, Rafael B. S. Veras, Natalia P. Saraiva, Luiz G. P. Marcondes, Denisson Q. Oliveira
Summary: The EOSOLAR project aims to investigate the structure of the atmospheric boundary layer in an equatorial coastal zone using ground-based remote sensing instruments and micrometeorological towers. This paper describes the study area, methodology, and instrumentation of the project, and presents results of the first field campaign and instrument validation.
Article
Energy & Fuels
Italo Fernandes, Felipe M. Pimenta, Osvaldo R. Saavedra, Arcilan T. Assireu
Summary: This article discusses the complementarity of remote offshore wind sites in Brazil and demonstrates that optimizing wind turbine locations can reduce grid seasonal variability. It introduces the concept of Reserve Wind Power (RWP) plants as reserve sources for energy security, which can be more cost-effective and environmentally friendly than thermal reserves.
Article
Green & Sustainable Science & Technology
Audalio R. Torres Junior, Natalia P. Saraiva, Arcilan T. Assireu, Francisco L. A. Neto, Felipe M. Pimenta, Ramon M. de Freitas, Osvaldo R. Saavedra, Clovis B. M. Oliveira, Denivaldo C. P. Lopes, Shigeaki L. de Lima, Rafael B. S. Veras, Denisson Q. Oliveira
Summary: This study compared the performance of a LIDAR and a SODAR in evaluating wind speed at different altitudes, finding that the LIDAR had slightly better performance in horizontal velocity and sampling efficiency compared to the SODAR, with both sensors showing similar performance at different locations.
Review
Green & Sustainable Science & Technology
Milad Shadman, Mateo Roldan-Carvajal, Fabian G. Pierart, Pablo Alejandro Haim, Rodrigo Alonso, Corbiniano Silva, Andres F. Osorio, Nathalie Almonacid, Griselda Carreras, Mojtaba Maali Amiri, Santiago Arango-Aramburo, Miguel Angel Rosas, Mario Pelissero, Roberto Tula, Segen F. Estefen, Marcos Lafoz Pastor, Osvaldo Ronald Saavedra
Summary: This paper discusses the current status and future development prospects of offshore renewable energy technologies in South America. It focuses on offshore wind, waves, tides, ocean currents, and thermal and salinity gradient. The potential of offshore renewable resources is evaluated based on published scientific papers. The conflicts and synergies associated with ocean space utilization are presented, along with the status of regulatory frameworks. The paper also examines the active, decommissioned, and planned projects, research groups, and laboratory infrastructures. The future perspectives on the development of offshore renewable energy sector in South America are discussed.
Article
Green & Sustainable Science & Technology
Rafael B. S. Veras, Clovis B. M. Oliveira, Shigeaki L. de Lima, Osvaldo R. Saavedra, Denisson Q. Oliveira, Felipe M. Pimenta, Denivaldo C. P. Lopes, Audalio R. Torres Junior, Francisco L. A. Neto, Ramon M. de Freitas, Arcilan T. Assireu
Summary: This study evaluates the benefits of hybridizing a power plant using an AI-based methodology to optimize the wind-solar ratio based on the Brazilian regulatory system. By collecting data and using wind profilers, sun trackers, and a Genetic Algorithm, the optimal wind-solar ratio was determined, leading to a monthly profit increase of over 39% with minimal energy curtailment.
Article
Green & Sustainable Science & Technology
Hercules Araujo Oliveira, Jose Gomes de Matos, Luiz Antonio de Souza Ribeiro, Osvaldo Ronald Saavedra, Jerson Rogerio Pinheiro Vaz
Summary: Blade Element Momentum Theory (BEMT) is widely used for designing horizontal-axis wind turbines due to its low computational cost and easy implementation. It has been shown in literature that BEMT accurately predicts output power. BEMT is applicable to turbines of different sizes.
Article
Energy & Fuels
Felipe M. M. Pimenta, Osvaldo R. R. Saavedra, Denisson Q. Q. Oliveira, Arcilan T. T. Assireu, Audalio R. Torres Junior, Ramon M. de Freitas, Francisco L. Albuquerque Neto, Denivaldo C. P. Lopes, Clovis B. M. Oliveira, Shigeaki L. L. de Lima, Joao C. de Oliveira Neto, Rafael B. S. Veras
Summary: The objective was to assess the wind resources of the east coast of Maranhao, Brazil using a combination of wind profilers, micrometeorological towers, and atmospheric reanalysis. Field campaigns recorded wind variations in the dry and wet seasons under the influence of the Intertropical Convergence Zone. The study found distinct diurnal patterns in wind speeds, with strong winds from the northeast during the dry season and decreased speeds with easterly and southeasterly components during the rainy season.
Article
Green & Sustainable Science & Technology
Diego L. S. Cosme, Rafael B. Veras, Ramiro G. R. Camacho, Osvaldo R. Saavedra, Audalio Torres, Mauro M. Andrade
Summary: Brazil's Boqueirao Channel in Sao Marcos Bay has significant tidal potential. Measurements and simulations suggest a potential tidal energy of 85.75 GWh, with an estimated Levelized Cost of Energy (LCOE) of 0.185 $kWh-1 for a projected hydrokinetic farm.
Proceedings Paper
Energy & Fuels
Yasmin Emily de Souza Oliveira, Denisson Queiroz Oliveira, Osvaldo R. Saavedra
Summary: This paper presents a survey on the main challenges to disseminating battery electric vehicles in the Brazilian power sector and conserving a sustainable position in the market. Through the study of international public policies and the Brazilian regulatory scenario, this research analyzes the advantages, challenges, and obstacles of the current context in Brazil, in light of the significant difference between the introduction of battery electric vehicles in the global market and in Brazil. This paper provides an exploratory understanding of the challenges for the spread of electromobility in Brazil.
2022 IEEE PES GENERATION, TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION - LATIN AMERICA, IEEE PES GTD LATIN AMERICA
(2022)
Proceedings Paper
Computer Science, Theory & Methods
Amiron W. Serra, Anna D. Rocha, Patricia S. Santos, Silvangela L. Barcelos, Osvaldo R. Saavedra, Rafael G. Bento
Summary: This paper presents the modeling and control strategies of the CAMPUSGRID microgrid, focusing on the operation of the photovoltaic system, battery energy storage system, and gas generator. Simulation results show that the distribution network of the microgrid meets local regulatory standards and the generation controls operate properly under steady-state and transient conditions.
2022 IEEE INTERNATIONAL AUTUMN MEETING ON POWER, ELECTRONICS AND COMPUTING (ROPEC)
(2022)
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.
