Comportamento dinâmico não-linear em fenômenos de colheita de energia usando dispositivos baseados em materiais piezoelétricos em estruturas aporticadas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo da aplicabilidade do sistema pultrudado de fenólica/fibras de carbono em cabos condutores

Pós-graduação em Engenharia Mecânica - FEG

Avaliação do desempenho operacional e de custos entre enfardadoras no recolhimento de palhiço de cana-de-açúcar

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo sobre a utilização de energia solar no Brasil para uso residencial

Pós-graduação em Engenharia Elétrica - FEB

Desenvolvimento de uma ferramenta de otimização para avaliar a expansão da transmissão de energia

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudos e aplicações da célula fotovoltaica DSC

The solar energy is far the largest source of energy available in earth and has attracted for milleniuns, the attention and interest for a rational use. The solar energy which strikes the Earth in one hour is bigger than the whole consume of energy in Earth in one year. Among the forms of transformation of this clean, renewable energy, the electrical conversion, photovoltaic cells, have the materials based on silicon or germanium semiconductors due to its technology and production processes involved still have a high production cost. An alternative to this solar cell is based on a synthetic dye and a semiconductor nanocrystalline TiO2, titanium dioxide, called DSC (Dye-Sensitized Cells), which have a cost of up to 80% lower than silicon cells

Seleção de motobombas para o setor sucroalcooleiro

This work has the purpose to explain how the sugar and alcohol sector works, detail all the processes which uses pumps and assist in the selection and specification of pumps attached with engines, that will make part in important industry processes in the manufacture of sugar and alcohol. A bibliographic revision about the working of sugar and alcohol sector and about pumps were made to help the analysis of a case. This case had the purpose to analyze the selected pumps that were part of a initial project of an industry which aimed a future expansion. The pumps that were selected to made part of the initial project were over dimensioned and were operating out of the best performance point, making the pumps inefficient because the expansion didn't happened. The solution was to select another pump with bigger performance and less power consumption to have a decrease in the energy consumption and in the operational costs of the industry and using the extra electric energy in the industry or selling it

Geração de energia renovável em residências: aplicação de tecnologias existentes

Due to the high value of the bill that the Brazilian has been paying, one of the most expensive in the world, is becoming increasingly attractive the option for renewable energy in form of distributed micro and minigeneration. In other words, the renewable energy sources are becoming attractive not only because of environmental concerns, but also due to economic issues. This has become even more relevant and concrete after approval of rules by National Agency of Electric Energy (ANEEL) on 4/17/2012 (Normative Resolution n ° 482/2012 of 04/17/2012) aimed at reducing barriers to installation of small distributed generation, including microgeneration, with up to 100 kW of power, and minigeneration, 100 kW to 1 MW. The Normative Resolution n ° 482/2012 creates the Energy Clearing System, which allows consumers to install small generators in its consumer unit and exchange energy with the local distributor. The rule applies to generators that use renewable sources of energy (hydro, solar, biomass, wind and cogeneration qualified). In this context, this paper presents a technical and economic analysis of installing a residential microgenerating plant composed of photovoltaic cells, solar panels and small wind turbines

Medidores inteligentes: o primeiro passo em direção as redes inteligentes

Smart grids are the focus of major study today because of the necessity of modernization in electrical systems and reduction of greenhouse gas emissions that increases global warming. Reaching the best deployment method, you must first of all know the current electrical system and how to use them for the benefit of this new technology. Preparing the action plan we should be aware of the main points of smart grids in each step of the electricity system - generation, transmission and distribution. Analyzed these topics, this work will focus on the first step in the implementation of the smart grids: the smart meters, tool which is already being implemented in Brazil. The main characteristics and applications of these devices, as well as their communication structure with the core distributors will be showed during the paper. Finally, we present a case study which will be discussed and analyzed based in the results obtained with the implementation of smart meters in the city of Vancouver, Canada, where we have a considerable savings already in the first year, with fully paying the initial investment and still have a profit

Projeto de recuperação da planta termelétrica do Laboratório de Vapor do Departamento de Energia da Faculdade de Engenharia de Guaratinguetá

Brazil is nowadays the greatest bet of investors for the future due to its stable economy growth. The country has grown side by side with the greatest demand for electrical energy. The international appeal for renewable sources is causing a change in the Brazilian energetic matrix, raising the amount of energy generated by thermoelectric power plants. The construction of new power plants, running on biomass, requires a crescent number of capacitated personnel to run them. The Faculdade de Engenharia de Guaratinguetá – UNESP – has a steam laboratory; witch is deactivated, which has a thermoelectric plant of small capacity. The laboratory reactivation and the return of its activities can be an important tool in order to graduate engineer able to operate on such units. This paper proposes four new experiments to be simulated on the Collage’s Energy Dep. Steam Lab when it gets back to its educational activities

Resistividade elétrica em aterro sanitário e relações com a produção de biogás

The landfill biogas can be an alternative energetic resource as a fuel to electrical energy generators, although, there are not too many techniques to prospect the gas. Usually, landfills receive home waste, which in most are constituted by organic matter whose degradation by anaerobic activity produces the biogas. Geophysics is an important tool in environmental studies and the electrorresistivity, an important method employed in contaminated areas by slurry or necroslurry, including a monitoring for each contaminator flow. The electrorresistivity has not too much application in finding biogas. For this work, two biogas drains in Rio Claro-SP landfill were selected: one whose waste disposition correspond to the initial activities in the landfill and another drain whose disposition started more recently. The result consists in a higher biogas production if compared to the biogas from the older drain. The present paper consists in a monitoring along one year, with dates collection in each fifteen days. These dates were tabled in Excel 2010 program and graphics of resistivity x depth were generated. Hereafter, most variable resistivity values depth were chosen, to further graphics pluviosity x resistivity generation in Grapher 8 program and the biogas output (m³/h) in monitoring period. The use of pluviosity parameter can be justified by its influence above resistivity. The results show that there is a horizon with possibly biogas accumulation. Lastly, the method was effective, although, for any application of geophysical methods, the knowledge about its limitations is necessary; in this case the influence of pluviosity and also that the measurements were made in one single point, it will not show any side variation

Sistema de iluminação inteligente através de redes de sensores wireless

The objective of this project is to collaborate with the society, working on a subject that is directly linked to issues of sustainability and environmental preservation. For this, a survey is being developed in order to make possible the creation of an intelligent mechanism, with the use of wireless solutions for the control of energy consumption in order to meet the needs of quality of life and reduce the average consumption of electrical energy. An intelligent lighting system can be explained simply, as an interconnected network of lamps in order to meet needs such as light intensity, the location of it, the moment will turn on or turn off the lights, among other possibilities. This network of lamps is controlled by algorithms implemented using microcontrollers, which may or may not have changed its characteristics. This can be automatic (pre-programmed by the administrator) or manual (controlled via a remote control, phones, etc.), and will depend upon the manager himself and also the characteristics imposed on the project. However, it is important to note that after the search is complete, decisions will be consistent with the Brazilian reality, ie, this system can only be feasible if it has all the characteristics described above, but with an affordable price so that people can acquire it

Selo PROCEL edifica - edifícios comerciais, de serviços e públicos

This paper presents a study on the labeling Procel Build, an action plan for energy efficiency in buildings which aims to build the foundations necessary to rationalize energy consumption in buildings in Brazil (PROCEL, 2009a, p. 5), ie Procel builds aims to ensure the construction of the building that has a low energy expenditure, but still provide a comfortable environment. In this research, it is also shown how the labels are obtained, which may be general or partial. The reader will find further explanation of the three aspects of a building, and they Envelopment, Lighting system and Air Conditioning System Finally, we present the advantages and challenges of system builds procel, showing the need for greater investment and disclosure of elements that contribute to the implementation of sustainable buildings in Brazil

Estudo sobre eficiência energética em uma unidade industrial

This work contemplates an opportunities study of the rational use of energy in an industrial unity from the demand analysis and electrical energy consumption. Through a guide of energy analysis it was described how to find the main problems that create energy wastes in an industry, showing the ways so the production processes avoid such wastes and start to use energy in a more sensible e efficient way. It was also studied, the technical e economical viability of possible interventions to be implemented in terms of energy conservation and of possible demand supply alternatives

Avaliação da viabilidade econômica do uso de um aquecedor solar de água de garrafas pet para aquecer o ar de uma cabine de pintura e uma estufa de secagem

Nowadays, the biggest part of the world's energy supply comes from fossil fuels and nuclear. However, the current need of the society for the preservation of the environment and wise use of natural resources, has favored the search for alternative energy sources and improvement of energy efficiency. In this new scenario, companies are beginning to mobilize in order to adapt its facilities to renewable energy. Solar, with its immense potential, not really exploited yet, can be very useful for companies that want to beat their sustainability goals. Given these facts, the aim is to evaluate the economic viability of introducing a solar water heater which uses a colorless PET bottle as one of its components in a plant. The hot water generated will heat the air of a paint booth and a warm house, reducing energy consumption, since they are heated by electric heaters