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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
361

An energy-efficient media access control protocol for wireless sensor networks /

Chen, Shi. January 2006 (has links)
Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2006. / Includes bibliographical references (leaves 84-86). Also available in electronic version.
362

Green office guide how to incorporate "green" practices in the workplace and its benefits.

January 2007 (has links)
Includes links to web sites for additional information. / Cover title.
363

Promoting residential energy conservation through real-time consumption feedback /

Pereira de Araujo, Joao Lucas, January 2006 (has links)
Thesis (M.F.A.)--Ohio State University, 2006. / Includes bibliographical references (leaves 97-100). Available online via OhioLINK's ETD Center
364

Net energy analysis in the Energy Research and Development Administration plan

Polenske, Karen R. January 1975 (has links)
Report prepared for the M.I.T. Energy Laboratory and the Office of Technology Assessment
365

Engineering and econometric approaches to industrial energy conservation and capital formation : a reconciliation

Berndt, Ernst R., Wood, David O. January 1977 (has links)
No description available.
366

Aggregate energy, efficiency and productivity measurement

Berndt, Ernst R. January 1978 (has links)
No description available.
367

Desenvolvimento de um modelo educacional para a conservação de energia /

Dias, Rubens Alves. January 2003 (has links)
Orientador: José Antônio Perrella Balestieri / Banca: Guilherme Eugênio Filippo Fernandes Filho / Banca: Jânio Itiro Akamatsu / Banca: Jorge Isaias I. Beltran / Banca: Irlan Von Lisingen / Resumo: As iniciativas destinadas ao uso racional da energia, em virtude da característica integradora de conceitos desse tema, revelam-se tanto nas ações mais elementares, como a eliminação do desperdício, quanto nas análises mais rebuscadas, envolvendo estudos técnico-econômicos para a escolha de uma determinada intervenção. Nesse leque de opções, a educação é um elemento sempre lembrado e tido como condição de significativa importância para levar adiante a mudança de valores dos consumidores de energia em prol da economia de recursos naturais e de capital. Todavia, a abordagem educacional do uso racional da energia, apesar das iniciativas pioneiras, necessita ser focalizada no indivíduo, no que se refere aos processos afetivos e cognitivos, para posteriormente agregar as informações de caráter técnico, visandose o incentivo à ação social. Para esse desenvolvimento, além dos estudos oriundos das atividades do setor energético, agregaram-se informações de domínio da psicologia e da educação, balizando-se pela legislação vigente e pelos critérios paramétricos da educação no Brasil. A característica transversal do tema, através do ensino contextualizado, cria condições favoráveis à construção do conhecimento a respeito da energia e seu uso e, portanto, tem potencial de promover o desenvolvimento sustentável pela cidadania. O presente modelo educacional para a conservação da energia tem o objetivo de contribuir com o setor energético visando sistematizar os conteúdos nos ensinos fundamental, médio e superior a partir de ferramentas efetivas para os processos de ensino-aprendizagem, auxiliando os educadores desses segmentos no planejamento do ensino. / Abstract: The initiatives aimed to energy conservation, due to its integrating characteristics, conduct many actions, since the energy waste elimination to the most sophisticated tool of intervention, as viability studies. In this range of options, the education always is remembered, because it is an important way to get the change of human values in a favor to save natural resources and capital. However, the educational broach of rational energy use, in spite of pioneering actions, needs to be person focused, relatively to the affective and cognitive process, to aggregate subsequently the technical information, looking for the social actions. For this development, beyond studies with origin in energy sector, information of psychology and educational domain was considered, aligning with present Brazilian legislation and educational parametric criteria. The transverse characteristic of this topic, by a contextualized teaching, create favorable conditions to knowledge build in relation to energy and its consumption and, hence, it has potential to promote the sustainable development by citizenship. The present educational model to the energy conservation has the objective to contribute with energy sector, in direction to systematize the contents at fundamental, middle and superior educational levels, starting from effective tools in teaching and learning process, helping teachers in these segments at teach planning. KEYWORDS: Energy conservation, teaching for citizenship, education. / Doutor
368

Análise técnico-econômica da utilização de um gerador à gás natural em um sistema de cogeração : estudo de caso /

Costa, Adriana Aparecida dos Santos. January 2003 (has links)
Orientador: Oscar Armando Astorga Maldonado / Banca: Júlio Santan Antunes / Banca: Maria Luiza Viana Lisboa / Resumo: Neste trabalho é apresentada uma proposta de sistema de cogeração utilizando motor de combustão interna à gás natural, visando otimizar a utilização da energia primária em um estudo de caso de uma empresa produtora de chapas pré-pintadas. Este grupo moto-gerador foi adquirido para suprir a escassez de energia elétrica no ano de 2001 no Brasil, e hoje tem sua operação inviável economicamente se utilizado somente como gerador. Para isso realizou-se uma auditoria energética na empresa em questão, uma análise do mercado energético atual, da legislação vigente sobre cogeração, da viabilidade técnico-econômica da implementação do sistema proposto, das perspectivas de expansão do parque industrial da empresa e dos aspectos estratégicos no que diz respeito a diversificação na obtenção da energia elétrica. Estudou-se também as características do sistema elétrico existente e as características dos equipamentos responsáveis pela geração de energia térmica. O estudo realizado buscou propor a melhor forma de utilização do grupo moto-gerador, com o menor impacto no sistema elétrico atual e sem prejuízos para o processo de produção. Os resultados deste trabalho convergiram para um sistema de cogeração compacto que melhor se adaptou às particularidades da empresa estudada. Além da vantagem financeira que este trabalho constatou, também existem vantagens técnicas e estratégicas. Assim sendo, este trabalho proporciona o suporte técnico necessário para a tomada de decisões de como melhor aproveitar o potencial energético do equipamento adquirido pela empresa em questão e para outras empresas que apresentam um panorama semelhante. / Abstract: In this work is presented a proposal of a cogeneration system using internal combustion engine using natural gas, with the objective to improve the employment of the primary energy in the case study in a manufacturer company of pre-painted metallic sheets. This moto-generation group was acquired in 2001 in order to supply the lack of providing of the electrical energy that Brazil confronted in the same year and now its utilization is not economic feasibility. An energetic audit has been carried out in the industry, an analysis of current energy market, the rules cogeneration's legislation, a technical–economic feasibility of the cogeneration system proposed an analysis regarding the company's expansion plan and the flexibility for supplying energy of the other sources. This work also analysed the existent electrical system and the characteristics of the equipment responsible for the thermal energy generation. This work has focused on a better utilization of the moto-generation group with a minimum number of changes in the electrical system and without causing any disturbance damages for the manufacture's production process. The results of this work indicated that a compact cogeneration system is the best solution considering the characteristics of the enterprise studied. Besides the financial advantages verified, there are technical and strategic advantages. So, this work will give technical support for decisions about the best advantage the energetic potential of the equipment acquired by company in matter and for other companies that present a similar panorama. / Mestre
369

A prescriptive analytics approach for energy efficiency in datacentres

Panneerselvam, John January 2018 (has links)
Given the evolution of Cloud Computing in recent years, users and clients adopting Cloud Computing for both personal and business needs have increased at an unprecedented scale. This has naturally led to the increased deployments and implementations of Cloud datacentres across the globe. As a consequence of this increasing adoption of Cloud Computing, Cloud datacentres are witnessed to be massive energy consumers and environmental polluters. Whilst the energy implications of Cloud datacentres are being addressed from various research perspectives, predicting the future trend and behaviours of workloads at the datacentres thereby reducing the active server resources is one particular dimension of green computing gaining the interests of researchers and Cloud providers. However, this includes various practical and analytical challenges imposed by the increased dynamism of Cloud systems. The behavioural characteristics of Cloud workloads and users are still not perfectly clear which restrains the reliability of the prediction accuracy of existing research works in this context. To this end, this thesis presents a comprehensive descriptive analytics of Cloud workload and user behaviours, uncovering the cause and energy related implications of Cloud Computing. Furthermore, the characteristics of Cloud workloads and users including latency levels, job heterogeneity, user dynamicity, straggling task behaviours, energy implications of stragglers, job execution and termination patterns and the inherent periodicity among Cloud workload and user behaviours have been empirically presented. Driven by descriptive analytics, a novel user behaviour forecasting framework has been developed, aimed at a tri-fold forecast of user behaviours including the session duration of users, anticipated number of submissions and the arrival trend of the incoming workloads. Furthermore, a novel resource optimisation framework has been proposed to avail the most optimum level of resources for executing jobs with reduced server energy expenditures and job terminations. This optimisation framework encompasses a resource estimation module to predict the anticipated resource consumption level for the arrived jobs and a classification module to classify tasks based on their resource intensiveness. Both the proposed frameworks have been verified theoretically and tested experimentally based on Google Cloud trace logs. Experimental analysis demonstrates the effectiveness of the proposed framework in terms of the achieved reliability of the forecast results and in reducing the server energy expenditures spent towards executing jobs at the datacentres.
370

Avaliação do projeto de eficiência energética com utilização de chuveiros elétricos com base recuperadora de calor aplicados em populações de baixo poder aquisitivo

Sippel, Cristian 11 April 2014 (has links)
Esta dissertação apresenta o estudo para determinação da redução da potência no chuveiro elétrico quando da utilização da base recuperadora de calor. Ainda, compara os resultados de duas metodologias de avaliação dos ganhos energéticos, em acordo ao estabelecido no Protocolo Internacional de Medição e Verificação de Performance (PIMVP), para as ações de troca de chuveiros nas comunidades de baixa renda. A aplicação da proposta comprovou que os resultados de redução de potência para o conjunto chuveiro mais base recuperadora podem ser extrapolados para toda a população que recebe a ação de eficiência energética. Mostrou que as estimativas para o fator de coincidência no período da ponta, que traduzem a utilização do chuveiro, constituem elemento decisivo na determinação da potência retirada no período da ponta. Por fim, a opção de medição e verificação baseada na opção “B” do referido protocolo é mais conservativa e mais assertiva na determinação dos resultados da potência retirada no período da ponta. / Submitted by Ana Guimarães Pereira (agpereir@ucs.br) on 2015-02-11T15:49:14Z No. of bitstreams: 1 Dissertacao Cristian Sippel.pdf: 1967099 bytes, checksum: 8a9585db16bd36d5ededbad91f8cf4d7 (MD5) / Made available in DSpace on 2015-02-11T15:49:14Z (GMT). No. of bitstreams: 1 Dissertacao Cristian Sippel.pdf: 1967099 bytes, checksum: 8a9585db16bd36d5ededbad91f8cf4d7 (MD5) / This dissertation presents a study to determine the power reduction in electric shower when using the heat recovery base. Also, compare the results of two methods of assessing the energy savings in accordance to the provisions of Protocol International Performance Measurement and Verification (IPMVP) for the exchange of shares of showers in low-income communities. The implementation of the proposal showed that the results of power reduction for the whole shower over recuperative base can be extrapolated to the entire population that receives the action of energy efficiency. Showed that the estimates for the coincidence factor at the period, which reflect the use of the shower, constitute decisive factor in determining the power drawn at the period. Finally, the choice of measurement and verification based on the "B" option is more conservative and more assertive in determining the outcomes of power drawn from the period.

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