286 resultados para ENERGIAS RENOVÁVEIS


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Pós-graduação em Química - IQ

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Pós-graduação em Design - FAAC

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Pós-graduação em Física - FEG

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Pós-graduação em Agronomia (Energia na Agricultura) - FCA

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Pós-graduação em Engenharia Mecânica - FEG

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Pós-graduação em Agronomia (Energia na Agricultura) - FCA

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Pós-graduação em Engenharia Mecânica - FEG

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O excessivo consumo de recursos naturais renováveis e não renováveis combinado com a ineficiência e o desperdício de seu uso geram uma problemática muito atual nos centros urbanos: a grande produção de resíduos sólidos urbanos (RSU) e sua destinação inadequada. O presente trabalho caracterizou o RSU da cidade de Salto – SP a fim de quantificar os materiais recicláveis presentes nestes sólidos, bem como mapear sua origem e o perfil social de sua fonte geradora. Foram utilizadas quinze (15) classes de recicláveis, além do lixo orgânico e rejeitos. Dentre as classes estão: latas de aço; sucatas ferrosas; papel misto; papelão ondulado; embalagens longa vida; polietileno de alta densindade – PEAD; polipropileno – PP; poliestireno (PS); PET óleo; PET refrigerante; vidro; outros plásticos – PVC, materiais compostos de mais de um tipo de plástico e PS expandido; aparas plásticas; latinhas de alumínio e outros alumínios,. Os resultados apontam para uma grande geração de materias recicláveis no RSU em bairros de maior poder aquisitivo. O porcentual total de recicláveis na cidade foi de 38,38%

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The disorded and unnplaned occupation is not recent in out territory but it concerns to a historical territorial invasion that roots the time of our country discovery. However, they have started to cause issues nowadays, as in the case of urban conurbations. Somehow these unorganized urban, industrial and agricultural occupations did not have any sort of information or indication of the appropriate situation at that time. Because of that there has been researches by several groups to induce the users of the several renewable and non renewable resources to explore them according to their natural potential capacity.The Ceramic Pole of Santa Gertrudes, the national largest producer of ceramic tile, faces this problem of disorder occupation. Among other themes, the reorganization of the physical environment, proposed by several groups of researchers and scholars of this subject, is gaining attention now.The method of Geoenvironmental Zoning results in a way of prevention from this issue. Crossing information of the physical environment and generating maps whose areas and subdivisions have similar characteristics, it is possible to manage studies and handle these areas according to their potentiality.

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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

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The discussions about the energy rationalization are gaining more and more space on the everyday of engineers and other professionals in the field of energy. A greater focus is being tied to commercial buildings, because they are one of the biggest responsible for the high energetic expenditure according to the National Energetic Balance, especially by the use of air conditioners for the people’s thermal comfort. Such finding made INMETRO to develop a building labeling procedure through th National Program of Electric Energy Conservation in Buildings; by means of this systematic, the built areas are classified by levels that go from A(the best) to E(the worst), taking into account envelopment, illumination system and air conditioning. A bonus process based on water rationalization, use of renewable energy sources, cogeneration systems or technical innovations, allows the classification to be changed up to one level. A study made exactly on a commercial building, the building of Foundation for Technological and Scientific Development located inside of the College of Engineering of Guaratinguetá, sought to identify technical/economic alternatives for the building certification and appealed to the bonus based on water rationalization. The present study is based on analysis of deploying a cogeneration system formed by internal combustion engine and an absorption refrigeration system as bonus alternative, so that the costs are analyzed regarding energy consumption and use of the motor. With the calculations and results, the viability of the building to receive a bonus from INMETRO through its National Program for Energy Conservation in Buildings is studied and concluded from this study whether or not you can get a better level of energy efficiency for the building in question... (Complete abstract click electronic access below)

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The concern with the environment preservation has done with that researchers as well as industries invest in the search for materials that come from renewable sources. Natural fibers, because they are ecologically correct and have low cost, have been studied as a possible substitute, even if partial, of synthetic fibers in the development of polymeric composites. In this context, the hybrid composites (natural/synthetic) increase considerably the range of application of natural composites. The auto industry, in its constant quest for good mechanical properties materials which are developed with sustainability, has in composites with hybrid reinforcement a very viable alternative. In the present work, the nature Crown pineapple fibers and nature Crown pineapple fibers treated with alkaline solution were studied in order to evaluate the influence of chemical treatment in its properties. For this techniques were used x-ray diffractometry, Thermogravimetry and Infrared Spectroscopy (FTIR). Composites have been developed using polypropylene, reinforced with pineapple fibers and pineapple fibers hybrids/glass fibres, both with levels of 5 and 10%. These composites were analyzed by Thermogravimetry techniques and tested by traction. The realization of this work indicated that although the chemical treatment did not affect the thermal stability of the fibers, caused an increase in crystallinity index fibers and decreased its hydrophilic. The tests performed on composite indicated that the composites process was suitable because it provided good dispersion of the polymer matrix. The addition of natural fibers from the pineapple's Crown, in a proportion of 10%, provided the greatest increase in modulus of elasticity (27%) when compared to the pure polymer