36 resultados para Operacions i Processos de Producció


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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This paper analyses the prosodic aspects of textual-interactive strategies related to the reformulation, organization and building of the speech regarding the item assim. Results suggest: (i) the regularity of some particular prosodic marks when performing these processes; (ii) the prosodic features of the item assim in each one of them and (iii) the relevance of the prosodic features for determining the function of the item concerning the strategies we are focused on.

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Pós-graduação em Educação Matemática - IGCE

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Stricter environmental policies are shown necessary to ensure an effective pollutant emission control. It is expected for the present year of 2015, that Brazil will assume, at the 21th United Nation's Climate Change Conference (COP21), implementation of commitment to a low carbon economy. This positioning affects the industrial environment, so that is deemed necessary to search for new technologies, less aggressive to the environment, so the adequacies to the new emission policies do not cause a negative effect on production. Almost all of the processes performed in the steel industry demand burning fuel and, therefore, flue gases are sent to the atmosphere. In this present work is discussed the utilization of heat exchangers so, by recovering part of the available heat from the flue gases of certain industrial process, the combustion air is preheated. The combustion air preheat results in less energy requirement, i.e., less need of fuel consumption and, in addition, minor amount of pollutants to be emitted. Due to better fitting to the process, it is studied the utilization of spiral plate heat exchangers. The heat exchanger dimensioning is made by an iterative method implemented in the software Microsoft Excel. Subsequently are analyzed the gains in terms of process's thermal efficiency improvement and the percentage of fuel saving. The latter implies in reduction of the same percentage of greenhouse gases emission