EST - Artigos de Periódicos
URI permanente para esta coleçãohttps://ri.uea.edu.br/handle/riuea/4779
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Item Estruturas flutuantes como alternativas para aproveitar a energia das correntezas na região amazônica.(Universidade do Estado do Amazonas, 2022-10-02) Coelho Neto, Eudes José; Hernández Fontes, Jassiel Vladimir; Onety, Renata da Encarnação; Hernández Fontes, Jassiel Vladimir; Hechavarría Pérez, José Ramón; Maia, Harlysson Wheiny Silva; Shadman, Milad; Maali Amiri, MojtabaFloating structures are widely used in the Amazon region to develop various activities, including fuel supply, social and health care services, food production, leisure activities, among others. Due to the need to preserve the region and reduce the consumption of fossil fuels to develop a sustainable future, the use of renewable energies using floating systems can be a viable option. The Amazon region has an immense hydrographic basin, with several rivers and their respective tributaries, making this an area with potential to take advantage of hydrokinetic energy. The present work discusses the possibilities of employing naval structures, of floating type, to harnessing energy from currents in the Amazon region. First, a brief review of shipbuilding in the Amazon and the typical floating systems of the region is presented. Subsequently, the most common technologies for harnessing energy from currents are presented. Next, it is presented a simplified concept of a regional floating structure, discussing some alternatives for harnessing renewable energies. Finally, the work discusses the barriers that such a technology can offer during implementation in the Amazon region. The research showed that the use of energy from currents using different types of floating systems can be an option to provide low energy consumption in remote regions without access to the electrical network. However, there is still a necessity of specific regulations to implement such type of technologies.Item Estudo preliminar da estabilidade transversal e da dinâmica de uma embarcação regional que naufragou na Amazônia(Universidade do Estado do Amazonas, 2024-07-16) Marinho, Hiago Francisco Andrade; Hernández Fontes, Jassiel Vladimir; Santander, Elvis Jhoarsy Osorio; Barreda del Campo, Eduardo RafaelSeveral ship accidents have occurred over the years in the Amazon region, causing negative environmental, economic and social impacts. Although there are no details of the causes of all accidents that occur in the region, some shipwrecks have detailed accounts of what may have happened, making it possible to open discussion topics based on technical evidence. The present work presents a preliminary technical study of a vessel that sank in the Amazon region, analyzing some stability and movement factors with a possible contribution to the occurrence of the accident. The first phase of the study presents the problem of accidents on regional cargo and passenger vessels, describing several cases that occurred in the Brazilian Amazon. Subsequently, a shipwreck case study was considered to carry out the technical analysis, whose first stage of study consisted in generating a three-dimensional geometry that resembled the vessel's hull. Therefore, an intact transverse stability analysis was carried out, verifying the effects of different drafts and positions of the center of gravity. Finally, a critical stability condition was selected to evaluate the vessel's roll movement when subjected to the interaction of regular waves with different amplitudes. The results obtained demonstrated that inadequate combinations of draft and weight distribution can reduce the restoration capacity in calm water conditions. In this situation, some wave conditions, even those with low amplitude, can aggravate the problem due to amplifications of the roll movement and water shipping the deck. It is suggested that in situations where vessels operate with little freeboard, which are common in the Amazon region, there is a risk of shipping water, which can flood internal spaces if there is no adequate sealing of the deck, further compromising the survivability of the vessel. It is hoped that the present study can be extended to evaluate the possible causes of other accidents with regional vessels.