Dantas, Tereza Neuma de CastroCarvalho, Caline Nunes de2022-07-152022-07-152022-03-31CARVALHO, Caline Nunes de. Otimização da produção de ferramenta de perfilagem de poços de petróleo para redução da pegada de carbono. 2022. 122f. Tese (Doutorado em Engenharia Química) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2022.https://repositorio.ufrn.br/handle/123456789/48527One of the most severe issues of the current society is the global climate change caused by uncontrolled greenhouse gas (GHG) emissions. Determining the carbon footprint (CF) of any processes or products is an important step to identify activities with highest potential of GHG emissions. Industry processes represent almost 30% of the global GHG emissions. Despite the efforts to green the global economy, considerable attention must be focused to assess and characterize the environmental impact of products and processes from all different industry sectors. Heat treatment methods are often used to manufacture critical parts for petrochemical, aerospace, and automotive industries. The hydrogen furnace is an equipment that provides the controlled atmosphere required for heat treatment, producing high integrity assemblies. This research presents a proposal to quantify the CF and to define a strategy to reduce the environmental impact related to the application of hydrogen furnaces for brazing processes. Initially it was done a systematic and critical bibliometric analysis of CF reduction techniques implemented in different industry sectors along the last three decades by using the softwares StArt® and the VOSViewer®. In addition to guiding de methodology choose for this research, the framework and results of this systematic literature review can be used as a baseline for future empirical research also providing innovative directions. The proposed method is based on modifying the furnace cooling system by replacing the current water supply for a closed loop. For that, two scenarios have been proposed using the UniSim® software: one connecting the water flow from the furnace to the facility chiller system, and another one keeping the same conditions as water closed loop but changing the chiller refrigerant from R-134a to ammonia. The data obtained as a result of the simulation were essential to estimate the energy needs of each scenario. Also considering furnace manufacturing manual and datasheet, the carbon footprints were determined using the software SimaPro®. The water usage and the wastewater generation were not relevant when compared to the GHG emissions from the refrigerant and the electricity consumption. Therefore, the CF must be combined with other environment impact indicators to determine what is the best cenarium to be applied. The change on the furnace water supply for a closed loop allowed a significantly decrease of water consumption, eliminating the monthly disposal of more than 980,000 liters of that resource. Taking into consideration the furnace contiuous operation, the implementation of the proposed cenarium allowed an annual savings of $ 17,473.94 and a full payback in 15 months.Acesso AbertoGases do efeito estufaPegada de carbonoForno contínuoBrasagemRefrigeração industrialdoctoralThesis