Vol. 13 No. 1 (2026)

Lajer, 27a edição, Janeiro - Abril

Published: 04/30/2026

Petróleo e Gás Natural

Desidratação de gás natural com glicóis: avanços tecnológicos e desafios operacionais

Kauany de Castro Silva, Andrea Komesu

1-16
- pdf (Portuguese)
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p1-16
Analysis of the numerical simulation of a tilted heterogeneous reservoir using the black oil model

Guilherme Souza Santos, Marlon Schmidt de Souza

17-28
- pdf (Portuguese)
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p17-28

Engenharias

Diagnóstico e simulação de falha em um transformador de potencial capacitivo de 345 kV

Arthur Carolino Soares, Clainer Bravin Donadel, Alcebíades Rangel Bessa

29-48
- pdf (Portuguese)
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p29-48

Energias de Baixo Carbono

The energy recovery of organic waste through anaerobic digestion is an important strategy for reducing greenhouse gas (GHG) emissions and promoting the circular economy in institutional environments. However, the lack of standardized digital tools makes it difficult to systematically record and monitor the operation of educational biodigesters. This paper presents the development and validation of a multi-platform, open-source mobile application for managing biogas production, energy estimates and quantifying avoided emissions in public schools. The system was implemented in Python/Kivy, with a modular architecture and SQLite database for offline operation, including waste registration, automatic calculation of biogas production, monitoring of gas measurements and export of reports. The solution was used in three educational institutions, and a case study was presented in which 219.10 kg of organic waste resulted in an estimated production of 15.12 m³ of biogas and mitigation of 182.10 kg CO₂eq. The results show greater reliability, agility and traceability of operational data, as well as support for environmental management and experimental teaching. The proposed platform is low-cost, scalable and replicable, making it an effective technological tool for integrating renewable energy generation, environmental monitoring and scientific education

Luis Enrique Santacruz Alvarez, Joylan Nunes Maciel, Ricardo Morel Hartmann, Diego Moraes Flores

49-60
- pdf (Portuguese)
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p49-60
Impact of renewable intermittency on brazilian smart grids

Maria Eduarda Dantas Martins, Rafael , Renato Santos Freire Ferraz

61-70
- pdf (Portuguese)
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p61-70
Comparação do desempenho dos algoritmos XGBoost e LightGBM na previsão de potência de sistemas fotovoltaicos

José Airton Azevedo dos Santos, Dalila Natalia Costa da Luz

71-80
- pdf (Portuguese)
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p71-80
Decadal Analysis of the Efficiency and Degradation of a Photovoltaic Plant in a Semi-Arid Region

Nicolas Rubens Silva de Sena, Romênia Vieira

81-89
- pdf (Portuguese)
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p81-89
Application of the IoT concept and open-source platforms for condition monitoring of low voltage electrical panels

Matheus Damaceno, Fernando Nunes, Diogo de Souza, Danilo Augusto Santana, Roberto da Piedade, Julian David Hunt

90-109
- pdf
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p90-109

Eficiência Energética

Evaluation of the energy consumption of conventional lighting and the cost reduction with its replacement by photovoltaic systems in the parking lot of IFPB - Campus Patos.

Ayrlla Caetano do Nascimento, Lícia Isadora Pereira de Medeiros, Echiley Alves da Silva, Robenilson Alves Santos Silva, Matheus de Souza Rodrigues, Dennis Oliveira Galdino

110-120
- pdf (Portuguese)
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p110-120
Wind Energy in Brazil and Preliminary Assessment of Wind Resources in Tangara da Serra, Mato Grosso State

Jhonatan de Brito Ferreira , Tarsila Marilia de Oliveira

121-128
- pdf
DOI: https://doi.org/10.21712/lajer.2026.v13.n1.p121-128