Estudo de um tomógrafo capacitivo elétrico paralelo aplicado ao processo adsortivo

• Ano de defesa: 2009
• Autor(a) principal: Soares., Manoel Brasileiro
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraí­ba; BR; Engenharia Mecânica; Programa de Pós-Graduação em Engenharia Mecânica; UFPB
• Palavras-chave em Português: Tomografia capacitiva elétrica paralela; Simulação PSPICE; Sensor capacitivo; Processo adsortivo; Instrumentação; Parallel electrical capacitive tomography; PSPICE simulation; Capacitive sensor; Instrumentation; ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/5405

Adsorption refrigeration systems are supposed to complement or even substitute the ordinary systems based on vapour compression. This work aims to study the application of a new technique of Electrical Capacitive Tomography - a parallel approach on the visualization of the adsorption process which occurs in the sorption bed of an adsorption refrigerator. To archive this goal, a sorption bed glass prototype was developed and it allows the utilization of the Parallel ECT to map the spatial distribution of methanol into the activated charcoal inside the sorption bed and makes it feasible to optimise the process. The principles of the adsorption phenomenon are explained regarding the adsorption refrigeration cycle. The Parallel ECT system is based on a wideband electronic differentiator which is supposed to be immune to stray capacitances often encountered in ordinary ECT systems, to have a high sensitivity, good signal-to-noise ratio, accuracy, and to be faster then the serial tomography. The various components of a tomographic system are analyzed as well as the results obtained from PSPICE electronic simulations and the making process of the printed circuit boards for the modules of an ECT system is also shown.