Navegando por Assunto "Energy"

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Acesso aberto (Open Access)
Ensino de ciências: uma proposta formativa para futuros professores dos anos escolares iniciais no estudo de energia
(Universidade Federal do Pará, 2022-06-09) HIRAI, Lêda Yumi; Fraiha-Martins, France; http://lattes.cnpq.br/4765567823575996; https://orcid.org/0000-0001-7933-6014
This is qualitative research in the narrative modality, based on the initial training of students of the Integrated Degree in Sciences, Mathematics and Languages for the Initial Years of Elementary Education, at the Federal University of Pará. Objective to understand the training processes experienced by future teachers in the early years when participating in a practice based on hybrid teaching, especially on the theme Energy in the rotation model by stations, in order to elaborate a proposal for the initial training of teachers to teach science in the early years. For the development of the analyzes and results, the field diary was used, the audio recording material made during the empirical research, as well as the material produced by the students in the tasks performed. And as a method of analysis, Discursive Textual Analysis was selected to understand the investigated narratives. In general, the undergraduates were interested in the practice, they had not had contact with the methodology of rotation by stations. The activities promoted reflections on the arrangement of tasks within each station, the contents and how the teacher's posture should be as a mediator of knowledge, guiding and guiding students towards knowledge. Through the results, the educational product entitled “ENERGY IN SCIENCE TEACHING: teaching practice of Station Rotation with students in the early school years” was created, considering its use by future teachers in the early school years to teach the energy theme. The material produced has three (03) units with information on the preparation of the activities script, suggestions of materials and technological tools to be used, I also present the planning of each station, containing lesson plans. In view of the training processes that were experienced by undergraduate students of the Integrated Licentiate course, I believe that the training proposal was accepted satisfactorily, being evidenced in the narratives of the undergraduates, when they point out their reflections on the theme and the material developed.
Acesso aberto (Open Access)
Estudo da viabilidade econômica para a utilização da semente da euterpe oleracea mart. (açaí) como recurso energético
(Universidade Federal do Pará, 2008-07-09) LUCZYNSKI, Miroslawa; MACHADO, Luiza Carla Girard Teixeira; http://lattes.cnpq.br/9773700229115395
This work had as objective the study of the economic viability for the Euterpe oleraceas Mart. (açaí) seed use as energy resource in the city of Belém-PA. Initially, it was realized a field survey of the sail points and quarters of biggest production of açaí, carrying through after that the assays of the termogravimetric properties of the seeds that are: Humidity text, volatile text, cinzas text, fixed carbon text and superior calorific power. The survey points made possible the creation of a data base, using the Microsoft Software Access, which supplies reports with the identification of the proprietors name, as well as the number of bags that is it processes per day, weight of bag and its energy potential. It was used still the Microsoft ARC VIEW, of easy interaction with Access that made possible the creation of an up to date map of the points for the city of Belém-PA. With those data a study of the transport routes was made in the Geographic Information System (GIS) GOOGLE EARTH. There were determined routes, through the Centroid method, which is the point of highest concentration of the variable of study, in this case, the açaís seed, for the transport of biomass to its final destination that is the UFPA, where if it finds the plant that uses the biomass as combustible to generate energy. When calculating the economic viability there were used the plant of Energy and Biomass of the Group of Energy, Biomass and Environment (EBMAs) together with the data of the consumption of electric energy of the UFPA in the period from 06/2006 to 06/2007, finally it was realized a comparison between the values gotten in the two done surveys and the confirmation of how much the UFPA would save in financial and energy terms with the biomass energy use. In conclusion the açaís seed is economically viable as energy resource for energy supply in UFPA, since the cost of supplied electric energy the concessionaire services the CELPA must exceed the cost of the renewable generation system, thus causing an economy in the final value, of the consumption of electric energy.
Acesso aberto (Open Access)
Propriedades Térmicas do (Bio)Butanol e a Fotocatálise do Grafeno com Trifenilamina Dopado com Metais para Geração de H2
(Universidade Federal do Pará, 2019-01-10) MARTINS, Marcelo Gonçalves; CHAVES NETO, Antonio Maia de Jesus; http://lattes.cnpq.br/3507474637884699
In this study, the optical properties and electronic structures of the transition metal-doped G-TPA using water as solvent were theoretically investigated in order to evaluate the efficiency in the production of photocatalytic hydrogen. in the Gaussian 09W software, using the B3LYP functional for all structures, and the base 6-31g (d) for the H, C and N atoms, and the LANL2DZ base, applying the effective potentials method for the transition metals (Ni, Pt, Pd, Fe, Os). Through the DOS of each structure an increase of accessible states in the valence layer was observed, as well as the decrease of the gap for all doping and for the structure with two and three radicals of triphenylamine. Through the UV-vis absorption spectrum, there was an improvement in absorption in the range of 490 nm to 615 nm. Another analysis carried out in the sense of energy generation was the evaluation of the thermodynamic potential of the butanol properties as complementary fuel or substitute for conventional fuels. For this, the Gaussian09W allied to the DFT was used again, but combined with the functional ones, hybrid B3LYP with the base set 6-311 ++ G (d, p) and 6-31 + G (d), G3 and G4 , in addition to the CBS / QB3 compounds. The simulations were carried out and the thermodynamic properties were found, such as: the specific molar heat at constant pressure, the enthalpy of formation and the entropy. All the properties were obtained between the temperatures 100K - 1500K and constant pressure of 1atm, in addition the enthalpies of combustion of the butanol isomers were obtained, several ternary mixtures were also proposed where it was possible to compare the enthalpy variations between the fuels: gasoline, ethanol and n-butanol.
Acesso aberto (Open Access)
A redução do consumo de energia elétrica em Manaus através de medidas de eficiência energética em climatização industrial
(Universidade Federal do Pará, 2011-02-28) SILVA, Jorge Lúcio da; BARREIROS, José Augusto Lima; http://lattes.cnpq.br/1246564618922453
The dissertation has as objective that is to evaluate the consumption of industrial electric industries in the Pole of Manaus – AM (PIM), through using the electric optimizing efficient energy with (EE), with based models comparison in the consumption of electricity consumed by the PIM. The study was based in accordance with national rules of industrial climate control technical standards established. It also measures the (EE) since it was used through replacement of the air conditioners window style of low efficiency, for equipments of high performance. The use of estimated thermal loads resulted in the application of electrical measurements, in which were obtained by evaluating the EE that allowed us to find mechanisms of linguistic variables that solved and enhance the capabilities of air conditioners, where they controlled both simultaneously the temperature, humidity, movement, and the purification of indoor air with in the Brazilian Television industry (IBT)To minimize the costs, we made analysis of programmed actions with calculation by tools through inference that provided the followings results: Control of the external sources of hot or cold, and verification of losses in the pipes and also losses in the environments, and adjust the temperature of thermal comfort, Such as environment and system utilization, and utilization control system for optimum use of equipment with thermo bank accumulation of ice or water which (EE)Measures have to be quantified of their consumption and savings to reduce electricity demand In their actual impacts of the company.Being so the results permitted a reduction of saving cost near about R$ 14.299,73 in actual eight months studied and representing a percentage of 7.32% savings for the company in its energy consumption amounting to a cost of R $ 1,787.46 a month showing real satisfactory outcome within the costs set by the IBT.