Orientador: Dionízio Paschoareli Júnior / Resumo: Este trabalho apresenta um método que visa possibilitar a gestão do aparente impasse envolvendo três agentes do setor elétrico. A Distribuidora de Energia que visa lucros, o Regulador que impõe às Distribuidoras, metas permanentes de melhor desempenho juntamente com viés de redução das tarifas e o Consumidor que deseja qualidade de fornecimento de energia e tarifas justas. Este método possibilita identificar e priorizar com precisão qual circuito de um sistema elétrico é mais adequado para os investimentos em melhoria de desempenho, quantificar o ganho de qualidade após as melhorias e avaliar técnica e economicamente se o benefício obtido em melhoria de qualidade produzirá retorno financeiro para remunerar o investimento. Para o desenvolvimento deste método, os dados de desempenho do sistema elétrico foram tratados estatisticamente para identificar quais ocorrências podem ser mitigadas com ações da distribuidora. Foi desenvolvida uma matriz de decisão multiatributos, referenciada pelos parâmetros de desempenho do sistema elétrico, para possibilitar a ordenação das regiões elétricas prioritárias para investimentos em melhorias. As ações técnicas de melhorias consideram a utilização de redes compactas e através de medições de desempenho destas redes e a comparação com o desempenho de redes nuas, foi possível estabelecer o potencial de redução do número de ocorrências após a implantação. Foi estabelecido critérios para identificar a taxa de melhoria de desempenho, que estabelece... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: This paper presents a methodology which supports the management of this apparent impasse involving three electricity sector agents. The Utility Company which focus on profit, the Regulator that imposes on Distributors permanent goals of better performance together with tariff reduction biases, and the Consumer who seeks for quality of energy supply and fair tariffs. This method makes it possible to accurately identify and prioritize which circuit of an electrical system is most appropriate for investments in performance improvement and to technically and economically evaluate whether the benefit obtained in quality improvement will yield financial return for the investment. For the development of this method, the performance data of the electrical system was treated statistically to identify which occurrences could be mitigated by distributor actions. A multi-attribute decision matrix was developed, supported by the performance parameters of the electric system, to enable the ordering of the priority electric regions for investments in improvements. The technical actions of improvements consider the use of spacer cable system. Through performance measurements of these networks, it was possible to establish the potential of reducing the number of occurrences after the implantation. To identify the rate of performance improvement a criterion has been established which establishes the correlation between the modernized network extension and the reduction of the number of occurre... (Complete abstract click electronic access below) / Doutor

The aim of this thesis is to describe the replacement of wire cutting laser cutting for cutting inserts made of hard material. Description of current situation in the company Vydona, tender and choice of laser and the need for post-laser workshop. The next section deals with the cutting of a particular sample. The last part of the technical economic assessment are calculated hourly rates of machines and the time and cost loads of different cutting inserts.

The use of gas microturbines as a primary unit in CHP is still weak in the industrial process. It gives the driving force to the main aim of this master thesis, which is the technical and economic evaluation of the gas microturbines waste heat recovery system, which is the key factor for their economic sustainability. Assignment contains description of CHP system that was gradually built in LENP laboratory, part of NETME Centre. The author has joined the final work before start-up of the CHP system. He presents and describes results of the first experiments on this unit. The flue gas of a microturbine was used for heating water by heat exchanger flue gas–water and for direct linen drying. The case study of laundry with capacity 10 tons per shift was developed in cooperation with companies in laundry care. Results of those tests were used to process integration and utilization of this professional industrial laundry All obstacles found and opportunities of the use of microturbines are comprehensively described and tested in case studies, which are simulated in Chemstation Chemcad Software. Results of the thesis are expected to be useful these fields: the use of gas microturbines in industry & energy savings in industrial laundries.