Estudo sobre uma turbina a gás instalada em uma refinaria de petróleo

The gas turbine (GT) is known to have: low cost of capital over the amount of energy, high flexibility, high reliability, short delivery time, commissioning and commercial operation at the beginning and quick departure. The gas turbine is also recognized for its superior environmental performance, manifested in air pollution containment and reducing greenhouse gases (Mahi, 1994). Gas turbines in simple cycle mode (SC) have long been used by utilities to limited power generation peak. In addition, manufacturing facilities use gas turbines for power generation units on site, often in combination with the process of heat production, such as hot water and steam process. In recent years, the performance of industrial gas turbines has been improved due to significant investments in research and development, in terms of fuel to electricity conversion efficiency, plant capacity, availability and reliability. The greater availability of energy resources such as natural gas (NG), the significant reduction of capital costs and the introduction of advanced cycles, have also been a success factor for the increased use of gas turbines to load applications base (Poulikas, 2004). Open Cycle Gas Turbine with a greater degree of heat to the atmosphere may alternatively be used to produce additional electricity using a steam cycle, or to compose a cogeneration process. The combined cycle (CC) uses the heat from the gas turbine exhaust gas to increase the power output and increase the overall efficiency of more than 50% second (Najjar, 2001). The initial discovery of these cycles in the commercial power generation market was possible due to the development of the gas turbine. Only from the 1970s that gas turbine inlet temperature and therefore the exhaust gas temperature was sufficiently high to allow a better efficiency in the combined cycle ... (Complete Abstract click electronic access below)

Nanoregulação: Avaliação dos cenários internacional e brasileiro

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Aços avançados de alta resistência: avaliação da microestrutura e propriedades dos aços DP 600 E DP 780

This work aims to study the Dual-Phase 600 and 780 steels, which are part of technology development project materials for the automotive industry. It is worth underscoring the antagonistic properties as the Dual-Phase steel assemble, high mechanical strength and elongation due its microstructure, ferrite and martensite. These properties are obtained by a intercritical heat treatment which facilitates the formation of a hardness metastable microstructure shaped plates of low carbon steels. The applicability of Dual Phase steel in the structure of vehicles is huge and its production is already on a commercial scale, so the study and development of this material implies lower cost in automobile manufacturing processes. The dual phase steels DP600 and DP780 underwent tensile, hardness and metallographic analysis to evaluate and comparing its properties. The results indicate that the DP780 steel has higher strength and hardness than the DP600 steel and its microstructure consists of martensite higher fraction which accounts for the higher resistance and hardness. However, the DP600 has higher conformability to DP780 steel

Políticas industriais: definição e importância (ou não) de fundamentação teórica (parte 1)

O objetivo deste artigo é fundamentar teoricamente as políticas industriais, caracterizando as razões da preferência por um referencial teórico não equilibrista e nãomaximizador. Procura-se também definir de maneira eficaz estas políticas, destacando seus resultados positivos em termos de alguns parâmetros. Este artigo será publicado em duas partes. Nesta edição define-se política industrial, analisando-se também as razões da despreocupação com uma fundamentação mais rigorosa das políticas industriais. Em seguida, apresenta-se sucintamente uma teoria capaz de embasar estas políticas, ao mesmo tempo em que se analisa se tais teorias são importantes (ou não), em termos empíricos. No quarto item, que será publicado na próxima edição deste Boletim, discute-se a possível utilidade da política industrial, enfatizando falhas de mercado, bens públicos, mercados não-competitivos, externalidades e desenvolvimento tecnológico.

Políticas industriais: definição e importância (ou não) de fundamentação teórica (parte 2)

O objetivo deste artigo é, essencialmente, fundamentar teoricamente as políticas industriais, sobretudo mostrando as razões da preferência por um referencial teórico não equilibrista e não-maximizador. Busca-se também definir de maneira eficaz estas políticas, destacando seus resultados positivos - pelo menos potencialmente - em termos de alguns parâmetros (produção, eficiência, produtividade, renda, bem-estar, etc.). Para isso define-se política industrial, analisando-se também as razões da despreocupação com uma fundamentação mais rigorosa das políticas industriais. Em seguida, apresenta-se sucintamente se uma teoria capaz de embasar estas políticas, ao mesmo tempo em que se analisa se tais teorias são importantes (ou não), em termos empíricos. Nesta segunda parte discute-se a possível utilidade da política industrial, enfatizando falhas de mercado, bens públicos, mercados não-competitivos, externalidades e desenvolvimento tecnológico.

Metas de inflação no Brasil (1999-2012): uma análise institucional

The paper shows the advantages and handicaps of implementing an inflation target (IT) regime, from post-keynesian and institutional stances. It is post-keynesian as long as it does not perceive any benefit in the mainstream split between monetary and fiscal policies. And it is institutional insofar as it shows there are several ways of implementing a policy, such that the chosen one is determined by historical factors, as illustrated by the Brazilian case. Thus, one could even support IT policies if their targets were seen just as “focusing devices” guiding economic policies, but also regarding with due attention other targets, as, in the short run, output growth and employment and, in the long run, technology and human development. Therefore, an IT is not necessary, although it can be admitted, mainly if the target is hidden from the public, in order to increase the flexibility of the central bank.

Implementing inflation targeting in Brazil: an institutional analysis

The paper shows the advantages and handicaps of implementing an inflation target (IT) regime, from a Post-Keynesian and, thus, an institutional stance. It is Post-Keynesian as long as it does not perceive any benefit in the mainstream split between monetary and fiscal policies. And it is institutional insofar as it assumes that there are several ways of implementing a policy, such that the chosen one is determined by historical factors, as it is illustrated by the Brazilian case. One could even support IT policies if their targets were seen just as “focusing devices” guiding economic policy, notwithstanding other targets, as, in the short run, output growth and employment and, in the long run, technology and human development. Nevertheless, an IT is not necessary, although it can be admitted, mainly if the target is hidden from the public, in order to increase the flexibility of the Central Bank.

Teoria crítica da sociedade: um olhar sobre a educação em tempos de sociedade tecnológica

This article aims to discuss and reflect on the contributions of the Critical Theory of Society called for the field of education in times of increasing technological development. Therefore, we look to the works of three authors exponents of Critical Theory: Walter Benjamin, Theodor W. Adorno and Herbert Marcuse, highlighting the reflections and analyzes of these authors and using them as input in the educational field. The selfreflective and self-education is conceived in its potential to overcome the conditions of domination that remain in our society increasingly technified and supposedly democratic. Thus, the educational praxis think it seems like something urgent and necessary to be broken with certain conditions that keeps our potential to barbarism.

Pesquisas em animais: uma reflexão bioética

Animal models are an important tool in scientific research. It is known that this practice must be based on bioethical principles in order to impose limits about pain and suffering, or for inspecting proceedings and research site. This study has as aim to evaluate and present current legislation ruling animal research in Brazil, comparing it with other countries, as well as fostering bioethical reflection about this issue. For this, we present current Brazilian legislation and we have carried out international literature review and discussion. The articles were searched in PubMed data base, using the key words "bioethics" and "animal welfare". Nineteen articles from 1997 to 2013 were included. It was concluded the evident contribution of animal research for scientific research in several fields. It is morally relevant for humans, as rational beings, to secure humane treatment to animals contributing to research. The safest way to follow this path is establishing clear norms and studies well designed, involving society for assigning ethical norms. Thus, animal welfare would be guarantee.

A mercantilização dos bens naturais no setor elétrico: o caso da UHE Barra Grande

Pós-graduação em Geografia - FCT

Análise do efeito de entropia em computação quântica: simulações em ambiente paralelo

Pós-graduação em Ciência da Computação - IBILCE

Lean construction como estratégia para melhorias em canteiros de obras: uma revisão sistemática na literatura nacional

Pós-graduação em Engenharia de Produção - FEB

Modelagem plana industrial do vestuário: diretrizes para a indústria do vestuário e o ensino-aprendizado

The work shows the importance of process modeling in industrial flat field fashion design. This was achieved by a qualitative study identifying vision of modelers, students and teachers about this stage of development and production clothing product in the regional center of Londrina – PR. This research allowed the development of methodological guidelines for the teaching and preparation Modeling Industrial flat clothing.

Um estudo sobre o desenho aplicado ao design

Although technological development has created several tools and techniques of graphic representation, we highlight here the importance of the manual drawing abilities for the design creative process. Freehand drawing is used to facilitate the development of projects and show them more quickly and efficiently, and is an essential technique for any designer, regardless is informational, product or fashion designer.

Educação física escolar: estado da arte e direções futuras

The aim of this paper is to characterize and discuss the School Physical Education as a profession and subarea of research in the broader academic fi eld of Physical Education and educational research. To do that, it initially defi nes the difference between research in School Physical Education from research about School Physical Education, and point out the themes and research hypotheses for this subarea. It also analyses 289 articles characterized as research in School Physical Education, published in 11 Brazilian periodicals, classifying them in the following categories: “level of schooling”, “bodily practice” and “theme”. The results indicate that the majority of studies are carried out in elementary school, in “games” and “sports”, and in descriptive and interpretative research in School Physical Education practices in several dimensions and interrelations. In conclusion, it points to the need to a focus in the research in teaching, the implementation of public curricula, and teacher education. Finally, it alerts to the need for Brazilian postgraduate programs in the academic fi eld of physical education to invest more in research in School Physical Education subarea.