• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 2
  • Tagged with
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 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.
1

Prospec??o tecnol?gica para gera??o de energia e?lica

Falani, Samira Yusef Ara?jo de 24 October 2014 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-01-05T19:01:21Z No. of bitstreams: 1 SamiraYusefAraujoDeFalani_DISSERT.pdf: 2393333 bytes, checksum: 99da44b14830eda42de8cdd875057803 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-01-11T21:06:30Z (GMT) No. of bitstreams: 1 SamiraYusefAraujoDeFalani_DISSERT.pdf: 2393333 bytes, checksum: 99da44b14830eda42de8cdd875057803 (MD5) / Made available in DSpace on 2016-01-11T21:06:30Z (GMT). No. of bitstreams: 1 SamiraYusefAraujoDeFalani_DISSERT.pdf: 2393333 bytes, checksum: 99da44b14830eda42de8cdd875057803 (MD5) Previous issue date: 2014-10-24 / A acelera??o das mudan?as tecnol?gicas e o processo de globaliza??o t?m intensificado a competi??o e a necessidade de novos produtos (bens e servi?os), resultando na crescente preocupa??o das organiza??es no desenvolvimento de avan?os tecnol?gicos, econ?micos e sociais. O presente trabalho objetiva apresentar um panorama global do desenvolvimento das tecnologias relacionadas ? energia e?lica e projetar suas tend?ncias. Para conduzir esta pesquisa, faz-se (i) a revis?o bibliogr?fica sobre inova??o tecnol?gica, m?todos de prospec??o tecnol?gica e fundamentos da energia e?lica; (ii) a an?lise de patentes, apresentando o panorama atual da tecnologia estudada, por meio da busca de informa??es em bancos de patentes; e (iii) a elabora??o do mapa da evolu??o tecnol?gica dos aerogeradores e constru??o da tend?ncia futura a partir de informa??es da literatura e not?cias do setor estudado. A etapa (ii) permitiu o estudo de 25.644 patentes entre os anos 2003 a 2012, no qual os EUA e China lideram o ranking de depositantes e a empresa americana General Electric e a japonesa Mitsubishi apresentam-se como os maiores detentores da tecnologia e?lica. A etapa (iii) analisou e identificou que a maioria das inova??es apresentadas na evolu??o tecnol?gica da energia e?lica s?o inova??es incrementais de produto para o mercado. A proposta de tend?ncias futuras mostra que os aerogeradores do futuro tendem a ser de eixo horizontal, s?ncrono, com a nacele mais alta que 194m e de di?metro do rotor superior a 164m, possuindo gera??o superior a 7,5MW. Os materiais utilizados nas p?s ser?o novos materiais com caracter?sticas de baixa densidade e alta resist?ncia. As torres est?o com tend?ncia h?brida de materiais, aliando o a?o ao concreto. Essa disserta??o busca cobrir a lacuna existente na academia sobre a utiliza??o de t?cnicas de prospec??o tecnol?gica para o setor de energia e?lica, por meio do reconhecimento de que utilizar-se da an?lise de patentes, an?lise de artigos cient?ficos e not?cias da ?rea, proporcionam conhecimento sobre o setor e que influencia na qualidade das decis?es de investimento em P&D e, consequentemente, a melhora da efici?ncia e efic?cia da gera??o de energia e?lica / The acceleration of technological change and the process of globalization has intensified competition and the need for new products (goods and services), resulting in growing concern for organizations in the development of technological, economic and social advances. This work presents an overview of the development of wind energy-related technologies and design trends. To conduct this research, it is (i) a literature review on technological innovation, technological forecasting methods and fundamentals of wind power; (ii) the analysis of patents, with the current technology landscape studied by means of finding information in patent databases; and (iii) the preparation of the map of technological development and construction of wind turbines of the future trend information from the literature and news from the sector studied. Step (ii) allowed the study of 25 644 patents between the years 2003-2012, in which the US and China lead the ranking of depositors and the American company General Electric and the Japanese Mitsubishi stand as the largest holder of wind technology. Step (iii) analyzed and identified that most of the innovations presented in the technological evolution of wind power are incremental product innovations to market. The proposed future trends shows that the future wind turbines tend to have a horizontal synchronous shaft, which with the highest diameter of 194m and 164m rotor nacelle top, the top having 7,5MW generation. The materials used for the blades are new materials with characteristics of low density and high strength. The towers are trend with hybrid materials, uniting the steel to the concrete. This work tries to cover the existing gap in the gym on the use of technological forecasting techniques for the wind energy industry, through the recognition that utilize the patent analysis, analysis of scientific articles and stories of the area, provide knowledge about the industry and influencing the quality of investment decisions in R & D and hence improves the efficiency and effectiveness of wind power generation
2

Prospec??o tecnol?gica de c?lulas fotovoltaicas para energia solar

Sampaio, Priscila Gon?alves Vasconcelos 31 July 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-25T21:18:31Z No. of bitstreams: 1 PriscilaGoncalvesVasconcelosSampaio_DISSERT.pdf: 3304012 bytes, checksum: 80d7aafefa3834916ac5c98b674556d8 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-27T20:10:10Z (GMT) No. of bitstreams: 1 PriscilaGoncalvesVasconcelosSampaio_DISSERT.pdf: 3304012 bytes, checksum: 80d7aafefa3834916ac5c98b674556d8 (MD5) / Made available in DSpace on 2016-04-27T20:10:10Z (GMT). No. of bitstreams: 1 PriscilaGoncalvesVasconcelosSampaio_DISSERT.pdf: 3304012 bytes, checksum: 80d7aafefa3834916ac5c98b674556d8 (MD5) Previous issue date: 2015-07-31 / A energia solar apresenta-se como uma excelente alternativa para a gera??o de energia limpa e renov?vel. Esta disserta??o tem como objetivo identificar as tend?ncias tecnol?gicas das c?lulas fotovoltaicas para energia solar. A pesquisa caracteriza-se, em rela??o ? natureza, como sendo aplicada; em rela??o ? abordagem, ? quali-quantitativa; no que tange aos objetivos, ? explorat?ria e descritiva; concernente ao procedimento metodol?gico ? considerada uma pesquisa bibliogr?fica com um estudo de caso caso no setor de energia solar fotovoltaica. O desenvolvimento desta pesquisa iniciou-se com uma revis?o bibliogr?fica sobre energia solar fotovoltaica e prospec??o tecnol?gica. Em seguida, conduziu-se o mapeamento tecnol?gico das c?lulas fotovoltaicas para energia solar por meio da an?lise de artigos e de patentes. Posteriormente foi realizada a prospec??o tecnol?gica das c?lulas fotovoltaicas para energia solar atrav?s do M?todo Delphi, bem como a constru??o do mapa atual e futuro das tecnologias das c?lulas fotovoltaicas, para os cen?rios atual, ano 2020 e ano 2025. Os resultados desta pesquisa apontam que as tecnologias consideradas maduras (sil?cio mono e multicristalino) continuar?o sendo vi?vel t?cnica-comercialmente dentro do per?odo prospectado (2020 - 2025). Outras tecnologias que atualmente s?o vi?veis (sil?cio amorfo, telureto de c?dmio e seleneto de cobre ?ndio/Cobre, ?ndio e g?lio-disseleneto), poder?o n?o apresentar esta mesma condi??o em 2025. J? as c?lulas de nanofios de sil?cio, sensibilizadas por corante e as baseadas em nanoestrutura de carbono, que nos dias atuais n?o s?o vi?vel t?cnica-comercialmente, poder?o fazer parte do mapa futuro das tecnologias fotovoltaicas para energia solar. / Solar energy presents itself as an excellent alternative for the generation of clean, renewable energy. This work aims to identify technological trends of photovoltaic cells for solar energy. The research is characterized, in relation to nature, to be applied; regarding the approach is qualitative and quantitative; with respect to the objectives, it is exploratory and descriptive; concerning the methodological procedure is considered a bibliographic research with a case study in the case of solar photovoltaic sector. The development of this research began with a literature review on photovoltaic solar energy and technology foresight. Then it led to the technology mapping of photovoltaic solar cells through the analysis of articles and patents. It was later performed the technological prospecting of photovoltaic cells for solar energy through the Delphi method, as well as the construction of the current plan and future technology of photovoltaic cells for the current scenario, 2020 and 2025. The results of this research show that the considered mature technologies (silicon mono and multicrystalline) will continue to be commercially viable within the prospected period (2020-2025). Other technologies that are currently viable (amorphous silicon, cadmium telluride and copper indium selenide / Copper indium gallium diselenide-), may not submit the same condition in 2025. Since the cells of silicon nanowires, dye-sensitized and based on carbon nanostructure, which nowadays are not commercially viable, may be part of the future map of photovoltaic technologies for solar energy.

Page generated in 0.1544 seconds