Navegando por Assunto "Consumo de energia elétrica"

Agora exibindo 1 - 3 de 3

Acesso aberto (Open Access)
Abordagem CTS por meio de tema: consumo doméstico de energia elétrica
(Universidade Federal do Pará, 2014-10-23) CARVALHO, Ricardo Haroldo de; ALMEIDA, Ana Cristina Pimentel Carneiro de; http://lattes.cnpq.br/1265908866509687
As a teacher I could clearly understand, through my experience, the necessity of a Science teaching involving the real context of the learner. The reflections on my teaching practice motivated me to a teaching challenge that made a relation between the student conceptual domain and the real situations in his community . Thus, the purpose of this research is to investigate evidences of a critical attidude from the CTS teaching conception through problems presented related to electrical energy consumption. I tried to answer the researching question about how to enable critical analysis from students regarding to their own use of residential electricity. This research was conducted through a qualitative approach, the action research type. A workshop was developed using conceptual energy content, in order to integrate the topics of the teaching unit. As an analysis strategy of the collected data, I developed an interpretative analysis, the intention was to give meaning to the situations raised by the students during the classes. The information was obtained through questionnaires and records in field notes. The results presented that CTS teaching approach enabled students the critical thinking mainly about values and ethical issues, relating their social reality to the habit of excessive electrical energy consumption,considering that for some students the illegal connection is a justification for wasting energy. The research has shown the dialogic and changing potential of this educational approach as the record of some students changing attitudes in that situation. I believe that, in this sense, this project demonstrated that CTS approach in schools is possible and that citizenship needs to be developed, being the technological scientific literacy of their rights and duties important for the students good achievement in society.
Acesso aberto (Open Access)
Desenvolvimento e aplicação de metodologia para avaliação de desempenho hidroenergético de sistemas de abastecimento de água
(Universidade Federal do Pará, 2016-02-19) REGO, Augusto da Gama; PEREIRA, José Almir Rodrigues; http://lattes.cnpq.br/9918600634569244
This doctoral thesis aims developing a methodology and implementing it on software in order to evaluate a water supply system (WSS) hydro-energetic performance, as well as applying it on a real scale WSS. This paper was carried out in two stages: 1) modeling the hydro-energetic performance evaluation process, establishing of formulations to calculate hydro-energetic losses and implementing methodology on software; 2) applying the methodology at a real scale WSS, which required monitoring of hydraulic and electrical quantities and simulating this WSS at Epanet 2.0. The first stage results consisted at defined hydro-energetic losses and conceptualize hydro-energetic performance on the proposed methodology, which consists sequences of actions and mathematical formulation to calculate hydro-energetic losses at the WSS, as well as to evaluate WSS hydro-energetic performance and, finally, at methodology implementation in a software using Visual Basic for Applications (named as SADHE2A) and successfully tested at the WSS with synthetic data. The second stage results are related to methodology application at WSS of Guanabara (located at Ananindeua city, Pará, Brazil), using SADHE2A – versão Beta, in which were identified water global losses of 55.42% and electrical energy global losses of 8.31% (both classified as “bad” by the methodology), resulting in an economical deficit of 17,981.77 R$/month. This value is equivalent to 57.61% of electrical energy costs, since raw water pumping to the final water costumer. Finally, the methodology developed has met the research expectations to calculate the water losses and electricity consumed losses and to evaluate the hydro-energetic performance of the WSS in Brazil and world.
Acesso aberto (Open Access)
Uma metodologia para enquadramento tarifário eficiente, por meio de análise da demanda e do consumo de energia elétrica: um estudo de caso nas unidades da Universidade Federal do Sul e Sudeste do Pará
(Universidade Federal do Pará, 2017-01-25) SILVA, Dhonny Lima da; FRANCÊS, Carlos Renato Lisboa; http://lattes.cnpq.br/7458287841862567
In the current world context of technological advances in which society becomes increasingly dependent on electric power, an interesting fact draws attention, the waste of electric power in the institutions that generate technical and scientific knowledge, Federal Universities, a proven fact by the concern and initiative of the National Electric Energy Agency published in October 2016 through the call 01/2016 the electric power distribution concessionaires, which aim among other objectives to invest in energy efficiency and minigeration in the Federal Universities, which shows the absence of strategic energy management, lack of a culture of energy resources optimization and of public resources, and the disengagement with the sustainable use of electric power and, as a consequence, of natural resources by most Federal Universities. Thus, this work may help in the search for the minimization of waste of electric power and public resources in the Federal Universities, as it will propose an efficient methodology of tariff framework, capable of evaluating and adjusting the contracted demand (kW) and the consumption tariff modality of electricity from groups A4 and B3 to current regulations. The methodology consists of achieving energy efficiency, through the demand, tariff framework and the consumption of electric power analysis in the consumer units of the IFES, in particular the case study of the units of the Federal University of the South and Southeast of Pará, through the study of the monthly electric bills and the resolutions and norms on the types of electricity tariffs of groups A4 and B3, applied by National Electric Energy Agency, also respecting the case study that will take place in the concession area of the Electric Centrals of Pará. The methodology will also make the fine forecast of contracted demand (kW), so that one can contract the demand that is actually needed, avoiding wastes. As such, it is expected to adjust the contracted load demand (kW) of each consumer unit of the A4 group to be studied, its real necessity, avoiding unnecessary costs with contracted demand payments above or below the consumed demand, it is also aimed to adapt the tariff structure of each observed consumer unit, both in the A4 and B3 groups, according to its load demand and its electric power consumption and, finally, the cost reduction for Public Administration is sought and provide a practical way of analyzing and indicating the best tariff framework of the groups studied, and by such, achieving sustainable consumption and efficient electricity contracts.