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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.
1

An?lise de m?todos para aplica??o de ventila??o natural em projetos de edifica??es em Natal-RN

Cunha, Leonardo Jorge Brasil de Freitas 11 February 2010 (has links)
Made available in DSpace on 2014-12-17T13:57:01Z (GMT). No. of bitstreams: 1 LeonardoJBFC_DISSERT.pdf: 4968156 bytes, checksum: 1552078bbabf9200e90e9a2e93780139 (MD5) Previous issue date: 2010-02-11 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Natural ventilation is an efficient bioclimatic strategy, one that provides thermal comfort, healthful and cooling to the edification. However, the disregard for quality environment, the uncertainties involved in the phenomenon and the popularization of artificial climate systems are held as an excuse for those who neglect the benefits of passive cooling. The unfamiliarity with the concept may be lessened if ventilation is observed in every step of the project, especially in the initial phase in which decisions bear a great impact in the construction process. The tools available in order to quantify the impact of projected decisions consist basically of the renovation rate calculations or computer simulations of fluids, commonly dubbed CFD, which stands for Computational Fluid Dynamics , both somewhat apart from the project s execution and unable to adapt for use in parametric studies. Thus, we chose to verify, through computer simulation, the representativeness of the results with a method of simplified air reconditioning rate calculation, as well as making it more compatible with the questions relevant to the first phases of the project s process. The case object consists of a model resulting from the recommendations of the C?digo de Obras de Natal/ RN, customized according to the NBR 15220. The study has shown the complexity in aggregating a CFD tool to the process and the need for a method capable of generating data at the compatible rate to the flow of ideas and are discarded during the project s development. At the end of our study, we discuss the necessary concessions for the realization of simulations, the applicability and the limitations of both the tools used and the method adopted, as well as the representativeness of the results obtained / A ventila??o natural ? uma estrat?gia bioclim?tica eficaz na promo??o do conforto t?rmico, da salubridade e no arrefecimento da massa edificada. Contudo, a despreocupa??o com a qualidade ambiental, as incertezas envolvidas no fen?meno e a populariza??o dos sistemas artificiais de climatiza??o costumam servir de argumento para os que negligenciam os benef?cios do condicionamento passivo. As incertezas podem ser reduzidas quando a ventila??o ? contemplada em todas as etapas de processo projetual, principalmente nas fases iniciais, na qual as decis?es t?m grande impacto no desempenho da edifica??o. As ferramentas dispon?veis para quantificar o impacto das decis?es projetuais consistem basicamente no c?lculo da taxa de renova??o ou na simula??o computacional de fluidos, comumente denominada CFD, sigla em ingl?s para din?mica computacional de fluidos , ambas com algum distanciamento da pr?tica do projeto e carentes de adapta??o para que possam ser utilizadas em estudos param?tricos. Assim, optou-se por verificar, atrav?s da simula??o computacional, a representatividade dos resultados obtidos com o m?todo de c?lculo simplificado da taxa de renova??o do ar, bem como torn?-lo mais compat?vel com as quest?es pertinentes ?s primeiras fases do processo projetual. O objeto de estudo consiste em um modelo resultante das recomenda??es do C?digo de Obras de Natal/ RN, cujas aberturas foram dimensionadas de acordo com a NBR 15220. A pesquisa mostrou a complexidade em agregar uma ferramenta CFD ao processo e a necessidade de um m?todo capaz de gerar dados na mesma velocidade com que as id?ias surgem e s?o descartadas durante o desenvolvimento do projeto. Ao final discute-se as concess?es necess?rias para a realiza??o das simula??es, a aplicabilidade e as limita??es tanto das ferramentas utilizadas quanto do m?todo adotado e a representatividade dos resultados obtidos

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