BDTD - Biblioteca Digital de Teses e Dissertações
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Doctoral Thesis Modelo de apoio à decisão para desativação ou prolongamento da vida útil de parques eólicos onshore(Universidade Federal do Rio Grande do Norte, 2024-04-25) Agra Neto, João; Gonzalez, Mário Orestes Aguirre; Andrade, Humberto Dionisio de; Almeida, Mariana Rodrigues de; http://lattes.cnpq.br/7356242205950550; Barbalho, Sanderson César Macedo; Santanna, Vanessa CristinaThe number of onshore wind farms reaching the end of their useful life in various parts of the world is on the increase and requires their owners to make a decision on whether or not to continue operating them. The present thesis aims to develop a decision-making model regarding the extension of the useful life or deactivation of onshore wind farms. The research method included four stages: 1) construction of the state of the art based on theoretical research narrative and systematic literature review, 2) systematization of the factors and variables that influence decision-making at the end of the life cycle of onshore wind farms, 3) conceptual modeling, and 4) validation of the decision-making model by means of a questionnaire survey with managers of wind farms in operation and a focus group with experts. As a result, the model presents eleven possible alternatives inserted in two scenarios: the deactivation and completion of operational activities and the extension of useful life of the farm. The factors and variables that influence the decision-making process are: external factors (national energy guidelines, public policies and regulatory aspects, logistical and infrastructural aspects, and technological development in the sector) and internal factors (economic-financial aspects, operational aspects, environmental aspects, regional aspects, and human resources). The model also includes: 1) the process for developing the technical and economic feasibility study to support the decision to decommission or extend the useful life of onshore wind farms, and 2) the relational approach to conducting the technical and economic feasibility study. It is concluded that wind farms that reach maturity of more than 12 years should be studied in order to make a decision on whether to decommission or continue their operation, taking into account the factors internal and external to the wind farm included in the model. We believe that the proposal in this thesis can serve as a reference for academic studies as well as for decision-makers at wind farms in operation.Master Thesis Identificação das políticas de incentivo ao desenvolvimento da energia eólica no Rio Grande do Norte (RN)(Universidade Federal do Rio Grande do Norte, 2015-04-23) Agra Neto, João; Queiroz, Fernanda Cristina Barbosa Pereira; Furukava, Marciano; ; http://lattes.cnpq.br/7046131809246694; ; http://lattes.cnpq.br/4742833301655917; ; http://lattes.cnpq.br/9767360404555126; Queiroz, Jamerson Viegas; ; http://lattes.cnpq.br/0037657888703116; Lima, Nilton César; ; http://lattes.cnpq.br/5091784860089845Energy is a vital resource for social and economic development. In the present scenario, the search for alternative energy sources has become fundamental, especially after the oil crises between 1973 and 1979, the Chernobyl nuclear accident in 1986 and the Kyoto Protocol in 1997. The demand for the development of new alternative energy sources aims to complement existing forms allows to meet the demand for energy consumption with greater security. Brazil, with the guideline of not dirtying the energy matrix by the fossil fuels exploitation and the recent energy crisis caused by the lack of rains, directs energy policies for the development of other renewable energy sources, complementing the hydric. This country is one of the countries that stand out for power generation capacity from the winds in several areas, especially Rio Grande do Norte (RN), which is one of the states with highest installed power and great potential to be explored. In this context arises the purpose of this work to identify the incentive to develop policies of wind energy in Rio Grande do Norte. The study was conducted by a qualitative methodology of data analysis called content analysis, oriented for towards message characteristics, its informational value, the words, arguments and ideas expressed in it, constituting a thematic analysis. To collect the data interviews were conducted with managers of major organizations related to wind energy in Brazil and in the state of Rio Grande do Norte. The identification of incentive policies was achieved in three stages: the first seeking incentives policies in national terms, which are applied to all states, the second with the questionnaire application and the third to research and data collection for the development of the installed power of the RN as compared to other states. At the end, the results demonstrated hat in Rio Grande do Norte state there is no incentive policy for the development of wind power set and consolidated, specific actions in order to optimize the bureaucratic issues related to wind farms, especially on environmental issues. The absence of this policy hinders the development of wind energy RN, considering result in reduced competitiveness and performance in recent energy auctions. Among the perceived obstacles include the lack of hand labor sufficient to achieve the reporting and analysis of environmental licenses, the lack of updating the wind Atlas of the state, a shortfall of tax incentives. Added to these difficulties excel barriers in infrastructure and logistics, with the lack of a suitable port for large loads and the need for reform, maintenance and duplication of roads and highways that are still loss-making. It is suggested as future work the relationship of the technology park of energy and the development of wind power in the state, the influence of the technology park to attract businesses and industries in the wind sector to settle in RN and a comparison of incentive policies to development of wind energy in the Brazilian states observing wind development in the same states under study.