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Abstract(s)
O presente relatório refere-se à tese realizada para obtenção do grau de Mestre em Engenharia Química, área de especialização Tecnologias de Proteção Ambiental, desenvolvida na empresa Cork Supply Portugal, SA, especificamente na unidade de rolhas naturais. O objetivo foi propor o desenvolvimento de novas metodologias de avaliação de parâmetros associados ao desempenho da rolha, nomeadamente a determinação da longevidade de rolhas em garrafa, em dois tipos de rolha produzida pela empresa, natural e microaglomerada, tendo como influência a diferente gama de gargalos existente e o tempo de uso do vedante. Para isso, investigou-se o desenvolvimento de nova metodologia de acompanhamento da recuperação elástica da rolha após extração e ferramenta para a monitorização de perfil de humidade da rolha no gargalo. O trabalho iniciou-se com testes de viabilidade do uso de ferramentas já existentes. Após ambos os testes terem mostrado serem viáveis para desenvolvimento, realizaram-se os ensaios necessários para obtenção dos métodos. Para validação destes foram realizados ensaios em simultâneo pelos métodos de referência. Relativamente à nova metodologia de acompanhamento da recuperação elástica da rolha após extração, conseguiu-se chegar à sua implementação onde, através de fotografia à rolha extraída dos 0 aos 15 minutos, e posterior processamento de imagem, se consegue obter os valores dos diâmetros da rolha sendo posteriormente calculado as respetivas recuperações diametrais ao longo do tempo. O passo final, para se obter uma metodologia digital e automática, será, futuramente, a criação de uma aplicação capaz de realizar todo o processo, desde a captação da fotografia até ao cálculo da recuperação elástica da rolha. Quanto à ferramenta para a monitorização de perfil de humidade da rolha, percebeu-se que, por meio de termogramas obtidos da rolha extraída através de câmara termográfica, é possível obter o perfil de absorção, observação demostrada pela equação matemática encontrada entre as temperaturas obtidas pelos termogramas e as respetivas absorções analisadas pelo método de referência. Concluiu-se a necessidade e o interesse na aquisição de uma câmara termográfica pela empresa, de modo a otimizar as condições e criar uma base de dados de perfis de temperatura e de absorção, obtendo uma expressão matemática final que calculará o perfil de absorção em função do perfil de temperatura.
This report refers to the thesis carried out to obtain the degree of Master’sin Chemical Engineering, area of specialization Environmental Protection Technologies, developed in cork supply Portugal, SA, specifically in the unit of natural stoppers. The objective was to propose the development of new methodologies for evaluating parameters associated with the performance of the stopper, namely the determination of the longevity of stoppers in bottle, in two types of stoppers produced by the company, natural and microcluster, having as influence the different range of bottlenecks existing and the time of use of the seal. For this, we investigated the development of a new methodology for monitoring the elastic recovery of the stopper after extraction and tool for monitoring the moisture profile of the stopper in the neck. The work began with viability tests of the use of existing tools. After both tests were shown to be viable for development, the necessary tests were performed to obtain the methods. For validation of these, tests were performed by the reference methods. About the new methodology for monitoring the elastic recovery of the stopper after extraction, it was possible to arrive at its implementation where, through a photograph of the stopper extracted from 0 to 15 minutes, and subsequent image processing, the values of the diameters of the stopper can be obtained and the respective diametral recoveries were subsequently calculated over time. The final step, to obtain a digital and automatic methodology, will be, in the future, the creation of an application capable of performing the whole process, from capturing the photograph to calculating the elastic recovery of the stopper. As for the tool for monitoring the humidity profile of the stopper, it was noticed that, by means of thermograms obtained from the stopper extracted through thermographic chamber, it is possible to obtain the absorption profile, observation shown by the mathematical equation found between the temperatures obtained by the thermograms and the respective absorptions analyzed by the reference method. It was concluded the need and interest in the acquisition of a thermographic camera by the company, to optimize the conditions and create a database of temperature and absorption profiles, obtaining a final mathematical expression that will calculate the absorption profile according to the temperature profile.
This report refers to the thesis carried out to obtain the degree of Master’sin Chemical Engineering, area of specialization Environmental Protection Technologies, developed in cork supply Portugal, SA, specifically in the unit of natural stoppers. The objective was to propose the development of new methodologies for evaluating parameters associated with the performance of the stopper, namely the determination of the longevity of stoppers in bottle, in two types of stoppers produced by the company, natural and microcluster, having as influence the different range of bottlenecks existing and the time of use of the seal. For this, we investigated the development of a new methodology for monitoring the elastic recovery of the stopper after extraction and tool for monitoring the moisture profile of the stopper in the neck. The work began with viability tests of the use of existing tools. After both tests were shown to be viable for development, the necessary tests were performed to obtain the methods. For validation of these, tests were performed by the reference methods. About the new methodology for monitoring the elastic recovery of the stopper after extraction, it was possible to arrive at its implementation where, through a photograph of the stopper extracted from 0 to 15 minutes, and subsequent image processing, the values of the diameters of the stopper can be obtained and the respective diametral recoveries were subsequently calculated over time. The final step, to obtain a digital and automatic methodology, will be, in the future, the creation of an application capable of performing the whole process, from capturing the photograph to calculating the elastic recovery of the stopper. As for the tool for monitoring the humidity profile of the stopper, it was noticed that, by means of thermograms obtained from the stopper extracted through thermographic chamber, it is possible to obtain the absorption profile, observation shown by the mathematical equation found between the temperatures obtained by the thermograms and the respective absorptions analyzed by the reference method. It was concluded the need and interest in the acquisition of a thermographic camera by the company, to optimize the conditions and create a database of temperature and absorption profiles, obtaining a final mathematical expression that will calculate the absorption profile according to the temperature profile.
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Keywords
Cortiça Rolha Gargalo Perfil de humidade Recuperação elástica Cork Stopper Bottleneck Moisture Profile Elastic Recovery