Navegando por Autor "Soares, José Josimar"

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Corrosão intergranular no hélice de embarcação
(2021-08-20) Carvalho Neto, Basílio Ferreira de; Monteiro, Alberto de Castro; http://lattes.cnpq.br/8300386519703896; Monteiro, Alberto de Castro; http://lattes.cnpq.br/8300386519703896; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Takeno, Mitsuo Lopes; http://lattes.cnpq.br/1152601799191567
Considering that the propeller is the ship's propulsion element and without it working together with the engine, the ship is going nowhere and with the passage of time since its invention in 1827. It comes more and more being modernized in its manufacturing process and model, being manufactured with more suitable and resistant materials, because nowadays we have larger ships and more powerful engines and therefore the propeller needs to keep up with this evolution. in order to study more about the propagation of cracks that occur along the contours of the grains. Therefore, it is necessary to know what caused great vibrations in the main axis and hull of the ship, and to discuss an analysis, an inspection and report the failure and cause of fracture of the material. Descriptive research is then carried out. Therefore, it appears that due to damage to the propeller as a result of the impact with a supposed tree trunk during navigation on the Amazon River, then the performance recovery generated a tension in the affected area, due to this propeller performance generated in the affected area a crack that was welded to repair it and finally it resulted that the right thing to do was to have to reduce the four blades evenly to maintain the balance of the propeller and end the excessive vibration in the ship, which imposes the finding that what led to the fracture of the helix in the repaired area was an intergranular corrosion. The granular corrosion that is, the propagation of cracks that occurs along the grain boundaries, is the rupture in the propeller blade.
Eficiência de turbinas a gás: influência da temperatura no rendimento
(2021-04-08) Garcia Júnior, Newton de Leiros; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Lima, Placido Ferreira; http://lattes.cnpq.br/0865439005714077; Barros, Raimundo Mesquita
This work presents a descriptive research on how the efficiency of a gas turbine is influenced by the temperature of the inlet air. The research will analyze the operation of a turbine and show the effects of the incoming air on the machine's drop in performance. The generating engine object of this research is the GE LM6000PC aeroderivative gas turbine, located in an electric power generation park located in Manaus-Am. Based on bibliographic research, information collected in the generator park, the work developed as a descriptive research, and soon afterwards, simulations were performed using the Engineering Equation Solver (EES) thermodynamic function calculations program. The data generated in the EES were inserted in a spreadsheet and a graph of temperature vs. yield was generated in MS Excel. The graph shows, by means of variations in the parameters for decreasing the inlet air temperature, the quantification of the increase, up to 7.00%, in the efficiency of the gas turbine. Keywords: Temperature. Gas turbine. Efficiency.
Energy and exergy analysis of a adsorption chiller
(2019-10-20) Soares, José Josimar; Gomes, Joseh Emmanuel de Sousa; Gurgel, José Maurício Alves de Matos; Melo, Francisco José Araújo
This paper shows the energy and exergy analysis of a two-bed adsorption chiller. The system was developed at LES/CEAR/UFPB, and constitutes of two adsorption reactors, a condenser and an evaporator, which function independently. Cycle times and secondary flow switching control scheduling is performed using a LabVIEW® interface that allows automatically secondary flow control through the cycle management system (SGC). The experimental tests were performed with the silica gel / water adsorptive pair. The specific cooling capacity (SCP) and coefficient of performance (COP) of the two-reactor chiller were 81.4 W kg-1 and 0.52 respectively, with an exergetic efficiency of 8.2% for the best working conditions, represented by the triplet 72/30/15 ℃ and a cycle time of 35 min. The results reached the levels of recent publications of literature describing models with the same characteristics. The maximum temperature required for the operation of this system is compatible with the use of low-temperature industrial thermal waste and flat type solar collectors, which may allow its production on a commercial scale.
Um estudo bibliográfico da análise da substituição do fluido refrigerante R410A pelo fluido R32
(2021-08-20) Ramirez, John Ariel Nascimento; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653 E; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Monteiro, Alberto de Castro; http://lattes.cnpq.br/8300386519703896; Costa, José Francisco de Caldas; http://lattes.cnpq.br/5703032306296974
This bibliographical research aimed to analyze the performance coefficient of refrigerants R410A and R32 in an ideal vapor compression refrigeration cycle, assuming that the performance coefficient is of such importance in the analysis of refrigeration facilities. In the research, we selected R-410A and R32 fluids, considering that they are the most indicated to replace R-22, which should fall into total disuse in the year 2040, given its aggression to the ozone layer. What motivated us to carry out this research was the incessant search to find a fluid that had a low impact on the environment, our performance and future training in the undergraduate course in Mechanical Engineering, the performance of our activities in the area of HVAC and refrigeration. For the elaboration of this work, we carried out several searches, of scientific productions, that dealt with the evaluation of the operational parameters, that presented points such as: refrigeration capacity, power consumed by the compressor and the performance and discharge developed by the compressor. The impact on the environment was carried out by studies that used the TEWI method, performing an analysis of the performance of both refrigerants. According to the research carried out, the tests performed show a variation in the evaporation temperature between -7 and 7 °C, while the condensing temperature was maintained at 41 °C. In addition to the evaporation temperature, the compressor operating frequency was also varied from 45 to 60 Hz. The results obtained by SILVA (2018), during his research, showed that the power consumed by the compressor using R32 increased from 3 to 5% when compared to R410A. The cooling capacity of R32 was approximately 3 to 7% greater than for R410A. The COP was 2 to 8% higher using R32. The discharge temperature of the compressor operating with R32 was approximately 20 to 30 °C higher than for R410A. Considering the studies carried out, it appears that R32 has a superior performance than R410A, considering the smaller amount of fluid used in the system and the smaller GWP that this fluid presents.
Estudo de viabilidade para implantação de turbinas bulbo na microrregião do Rio Madeira
(2020-10-01) Sapucaia, Matheus Ben-Hur Ramirez; Pessoa, Cláudio Tavares; http://lattes.cnpq.br/0667003745522461 Endereço; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Rodrigues Filho, João Nery; http://lattes.cnpq.br/3860803328978892; Chagas, Sidney Assis; http://lattes.cnpq.br/1705258854443084 Endereço
Amazonas is the largest state in Brazil, with dense forests and large voluminous rivers, the 62 municipalities spread over its lands suffer from this Amazonian cost, which are major logistical and investment problems due to the large territorial area of the region. Serving this population with basic resources and electricity is challenging, as it makes the National Interconnected System (SIN) unfeasible to cross the Amazon and serve these municipalities. The state has several isolated and thermoelectric systems to serve the communities, even though the region has the largest water resources in the country for hydroelectric generation, and it is in the Amazon Forest that the largest quantity of diesel and natural gas thermoelectric plants is concentrated, damaging the sustainability of the region with the absence of renewable resources. This work will analyze the data of the micro-region of the Madeira River located in the state of Amazonas and the possibility of installing Small Hydroelectric Power Plants (SHPP) with Bulb type hydraulic turbines to serve those municipalities. The adopted methodology is characterized as bibliographic research, of a descriptive character and analyzing data provided by the national energy regulatory agencies, seeking to meet the population's energy demand in a sustainable manner. In this way, it was analyzed which regions would benefit, the demand that would need to be met for those municipalities and the positive gain that can be obtained using the technology of bulb type SHPPs, leaving aside non-renewable models or that cause great environmental impact such as the large Hydroelectric Power Plants (HEP) that are being built. The results show that there is a possibility of implantation of large HEP, however in the research for more sustainable conditions and of less impact for the region, the use of bulb turbines in SHPP becomes more viable and with less impacts.
Geração de energia elétrica a gás natural no município de Caapiranga-AM
(2021-04-05) Souza, Samanhtha Nathália da Silva; Lima, Elaine Carvalho de; http://lattes.cnpq.br/0858263572516136; Lima, Elaine Carvalho de; http://lattes.cnpq.br/0858263572516136; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Queiroga, Alberto Luiz Fernandes; http://lattes.cnpq.br/9632649964503729
Over time, man has been developing and mastering technologies at different stages of the evolution of science that has allowed various sources of energy to be developed. The northern region of Brazil in particular, the state of Amazonas (AM) has some peculiarities with regard to its regional integration with the rest of the country. Thus, the configuration itself in the midst of the Amazon biome poses a series of challenges for the state in terms of access to electricity. From this context, the present work has as objective: to elaborate a maintenance plan in the energy generating unit and to demonstrate its importance to the stability and reliability of the electrical system. In methodological terms, a qualitative approach was chosen, as it has a greater focus on understanding and explaining the facts, as well as greater familiarity with the object of study. In general, the results showed the importance of maintenance for the continuity of activities, especially in a scenario of logistical difficulties as we are faced with the reality of Amazonas.
Instalação de um sistema de ventilação e ar condicionado de uma sala de controle em uma refinaria de petróleo
(2021-04-09) Reis, Afranio Guimarães dos; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Lins, Rubevan Medeiros; Chagas, Sidney Assis; http://lattes.cnpq.br/1705258854443084
Ventilation installation and air-conditioning systems in public and collective places are highly important to guarantee simultaneously the parameters control that determine the thermal comfort of the occupants. In addition to ensuring the thermal comfort, the perfect functioning of this type of system will provide levels of air quality and purity within acceptable standarts, eliminating or minimizing the spread of deseases that might affect the human health. In Brazil there are norms and laws that define the installation criteria for air-conditioning systems. In this work, a study was carried out based on the current Brazilian standards that rule the installation of these systems, to evaluate whether the normative requirements were met in order to ensure the appropriate parameters of thermal comfort and air quality. Thus, this research aims to evaluate whether the installation of a ventilation and air conditioning system in a control room of an oil refinery presents the expected performance for which it was designed.
Melhoria da dissipação térmica em placas de processamento gráfico através da aplicação dos conceitos da transmissão de calor por condução
(2022-12-15) Silveira, Marcelo Iannuzzi da; Pinto, Camila da Costa; http://lattes.cnpq.br/5909706356694272; Pinto, Camila da Costa; http://lattes.cnpq.br/5909706356694272; Ferreira, Claudio Marcelo dos Santos; http://lattes.cnpq.br/1190883441665873; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653
The present work aimed to verify the effects of conduction heat transfer concepts in thermal dissipation projects of GPU memory chips operation stability. Conduction heat transfer concepts will be presented, describing the importance of thermal interface materials, highlighting the impact of duty cycle in the design, pointing out the effects of working temperature in electronic equipment evaluating how to improve its heat dissipation and testing a way to increase its work stability. Bibliographic research was used, in addition to the case study developed from an experiment with boards from a processing complex. Measurements were performed through the processing software itself, obtaining the simple average and presenting the percentage gains. The change allowed for an average reduction of 10% in the working temperature, 19% in the use of fans and a slight reduction of 1% in the energy consumption of the equipment in operation. Finally, the work demonstrated the efficiency of the observed solution, bringing to light relevant knowledge for the decision-making of the population in question about the decision to apply the improvement in their equipment.
Projeto de um sistema de refrigeração e climatização por adsorção que utiliza o par de trabalho carvão ativado e etanol
(2021-04-08) Silva, Francisco Mikael Alves da; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Costa, José Francisco de Caldas; http://lattes.cnpq.br/5703032306296974; Rodrigues Filho, João Nery; http://lattes.cnpq.br/3860803328978892
This project seeks to carry out the design of an alternative cooling system, where all the components of a laboratory scale prototype of an adsorption cooling system using the activated carbon and ethanol working pair will be dimensioned. The proposed system uses the principle of a four-motor engine to replace the compressor used in conventional air conditioning equipment by steam compression. Therefore, its operation does not depend on electrical energy, as it uses solar energy and uses refrigerant with low environmental impact. In the search for better performance, a new reactor will be designed, by increasing the contact area and reducing the thermal inertia of the reactor. Thus, with the making of this system, it will be possible to obtain a result compatible with the state of the art of models with the same technical characteristics and operating conditions.
Proposta corretiva em sistema de climatização no pavimento predial apresentando elevado nível de dióxido de carbono
(2022-12-21) Costa, Liliane Froz; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Pinto, Camila da Costa; http://lattes.cnpq.br/5909706356694272; Lima, Placido Ferreira; http://lattes.cnpq.br/086543900571407
This work aims at a thermodynamic approach of a pre-existing project, contemplating its inadequacy regarding the high level of carbon dioxide to point out its main causes. The methodology used for the development of the analyzes boils down ABNT standards, technical instructions from the equipment manufacturers of the object of evaluation, in view of the inspection carried out prior to this study. To do so, the types of air conditioning systems involved in the main affected parts of the system will be considered, in addition to bringing together the essential topics involved with respect to air renewal in the complex in order to obtain different observations in relation to the general foundation.
A viabilidade técnica e econômica da utilização da liga de ZAMAC reciclada em uma indústria do polo industrial de Manaus
(2021-04-05) Borges, Gleison Coelho; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Soares, José Josimar; http://lattes.cnpq.br/8049341977402653; Queiroga, Alberto Luiz Fernandes; http://lattes.cnpq.br/9632649964503729; Arruda, Gutembergue da Silva; http://lattes.cnpq.br/8833717823163756
Companies in the Brazilian industrial sector are always looking for ways to become or remain competitive in the market. For this, they need to see in their processes opportunities that set precedents for improvement. Within this context, the reduction of costs based on the reduction of waste of raw material or any other resource is a reality. Therefore, this work has as main objective to show the technical and economic feasibility of using recycled zamac alloy in an industry in Manaus / AM. Because, in line with the aspiration of most companies, this use aims precisely to make the best use of the raw material, bringing with it the other benefits. To achieve this objective, the work makes use of a case study in that company, using a methodology provided with bibliographic and documentary research. In addition, through technical visits and some tests, data were collected to analyze the use of zamac waste through recycling. The research ends the study reaching a positive conclusion, in which it is shown to be viable to use the recycled raw material in the studied company, so that the necessary adjustments can be made. As for the technical parameters that guarantee a good performance of the material, the recycled Zamac alloy meets the specifications if it is mixed with the virgin raw material in a certain proportion. As for the financial issues that need to be of benefit to the company, the use of recycled Zamac alloy represents a recovery of approximately 77% of the material that would be discarded.