DSpace JSPUI

This study analyzed the causes and possible solutions for failures in the transportation of metal billets in a steel industry in Minas Gerais, Brazil. The central problem identified refers to the recurrent dropping of billets during handling by overhead cranes equipped with electromagnets, an event that compromised operational safety and productive efficiency. The objective of this work was to investigate the technical causes of these failures—such as component wear, electrical instabili...

This study analyzes the technical and safety impacts resulting from the absence or inadequacy of grounding systems in residential electrical installations. The high incidence of fatal accidents related to failures in these systems justifies the research, considering the importance of grounding in protecting people and equipment. The adopted methodology consists of a bibliographic and documentary review, with a descriptive and explanatory approach, based on the ABNT NBR 5410 standards and...

The research addresses the use of home automation as a tool to improve the energy efficiency of residential air conditioning systems, highlighting the relevance of automation in controlling these systems, especially given the increase in energy consumption in homes. The general objective of the study was to investigate how automation can optimize the use of air conditioning by adjusting the operation of the units according to environmental variables, such as external temperature, occupan...

The speed regulator is a device that adjusts the electrical power generated according to the electrical energy demand requested by the SEP. Therefore, it is a device designed to regulate the power generated by the turbine rotor, controlling the rotation speed to maintain the system frequency within a range of acceptable values. Thus, it is a fundamental component in a hydroelectric plant. This research aims to carry out a bibliometric study to verify the benefits of using electronic spee...

The increasing concerns about clean and renewable energy sources have led to the emergence of various new forms of energy generation. Many of these energy generation methods are clean, reliable, and cost-effective, such as photovoltaic power plants. However, it is necessary to adapt the existing system to these new forms of energy generation. Thus, this study aims to analyze the influence of integrating photovoltaic power plants on the electrical parameters, harmonics, voltage variations...

Due to the environmental impacts caused by more conventional energy sources, interest in clean and renewable energy sources is increasing every day. Then the so-called distributed generations emerged and photovoltaic energy became popular. The result of this popularization is several on-grid photovoltaic energy systems being connected to energy distribution networks, which results in positive and negative impacts on the distribution networks, since they were not designed to receive such ...

The aim of this work is to present an innovative chemical device with a low-cost marker designed to be a tamper-evident seal when applied during activities to cut off the energy supply to defaulting consumers. The device can be used in boxes of different shapes and sizes, making it more comprehensive than the main solution currently used for the function, the so-called "hawk" device. The proposed methodology is based on systematic, standardized testing of market products and the developm...

The automation of the power distribution network has proven to be an effective strategy to improve the quality of supply and reduce response time in cases of interruptions. This work aims to present a comparative analysis between the traditional method of responding to a fuse switch in the district of Cataguarino, in Cataguases, and the use of the automated device RD ROCKET-1. The adopted methodology involved the analysis of operational data provided by the concessionaire Energisa, consi...

This work explores the importance of Operation and Maintenance (O&M) in solar plants, highlighting its relevance in the efficiency, reliability and profitability of these projects. The main objective was to analyze how effective O&M practices positively impact operational and financial performance, using an on-site case study. The methodology involved qualitative and quantitative research, collecting operational, financial and reliability data from a solar plant between January and Augus...

This study focuses on the challenges of distributed generation and its impacts on electricity distributors, given that the use of distributed generation is a rapidly growing practice in Brazil, both because it is a sustainable alternative to the use of hydroelectric plants and because it reduces a tariff for the consumer. However, for electrical power ports there are several consequences to the rapid implementation of this method, such as overvoltage, voltage and current fluctuations, ex...

This undergraduate thesis examines the evolution of railway signaling in Brazil, from the Staff system and relay interlocking to modern microprocessor-based systems, with emphasis on the Electrologixs equipment. The case study focuses on the railway section between Pindamonhangaba and Manoel Feio in the Vale do Paraíba, which operated for decades without contemporary signaling. The absence of automatic systems limited average speeds to 30 km/h, increased accident risks, and reduced logistical...

The present article describes the development of a grain mill prototype with an integrated safety system, designed in compliance with Brazilian Regulatory Standard No. 12 (NR-12), aiming to ensure the operational efficiency and the physical safety of operators. The research intended to develop and analyze an automated, safe and ergonomic equipment. Methodologically, the study was structured in four stages: the design of the mechanic and electric project, the implementation of the automat...

This study analyzes the feasibility and strategies for implementing an electric vehicle charging infrastructure along the BR-040 highway, in the section between Belo Horizonte and Rio de Janeiro. The research was developed through bibliographic review, analysis of secondary data, and mapping of existing charging stations in order to identify gaps and opportunities for network expansion. It was observed that, although the total number of charging points in Brazil has increased significantly in...

Law No. 14,300/2022 introduced a new regulatory framework for distributed photovoltaic generation in Brazil, leading to changes in the compensation and tariff structure applied to injected and compensated energy. These modifications directly affect the economic performance of photovoltaic systems connected to the distribution grid. This study aims to analyze the impacts of this legislation on electricity costs for Group A4 consumers who use distributed generation. A quantitative methodology i...

This research presents energy saving as an essential instrument for contemporary sustainable development. It introduces the key concepts, main energy sources, public policies, and technological innovations that promote energy efficiency. Based on a literature review and current data analysis, the paper examines the economic, environmental, and social benefits of energy saving, as well as the challenges to its implementation in various contexts. It concludes that efficient energy consumpt...

This study presents the importance of strategic planning in industrial maintenance, highlighting its direct influence on the reliability, efficiency, and safety of production processes. The proper operation and planned maintenance of industrial equipment are essential to ensure production continuity and reduce operational costs. The research was developed through a qualitative and descriptive approach, based on a medium to large-sized steel plant located in the state of Minas Gerais, Brazil.T...

This work aims to highlight the importance of Regulatory Standard No. 12 (NR-12) for the protection of workers involved in activities with machinery and equipment. The research discusses how the application of regulatory requirements is essential for reducing accidents and mitigating risks, and emphasizes the use of the Hazard Rating Number (HRN) calculation method as a crucial quantitative tool for this analysis. This study discusses the role of industrial automation as a strategic supp...

This study presents a comparative analysis of the energy efficiency of two HVAC systems: the VRF (Variable Refrigerant Flow) system and the Water-Cooled Chiller system, both designed to meet the thermal load of a 375 TR commercial building. The methodology included computational modeling, thermodynamic calculations using the EES software, and the evaluation of performance indicators such as COP, EER, energy consumption, and operating costs. Results showed that the Chiller achieved a sup...