Made available in DSpace on 2014-12-17T14:57:46Z (GMT). No. of bitstreams: 1 JohnENV.pdf: 2614116 bytes, checksum: 0c3230c680d60ac346167f3aa79669e3 (MD5) Previous issue date: 2004-06-04 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The investigation of viability to use containers for Natural Gas Vehicle (NGV) storage, with different geometries of commercial standards, come from necessity to join the ambient, financial and technological benefits offered by the gas combustion, to the convenience of not modify the original proposal of the automobile. The use of these current cylindrical models for storage in the converted vehicles is justified by the excellent behavior that this geometry presents about the imposed tensions for the high pressure that the related reservoirs are submitted. However, recent research directed toward application of adsorbent materials in the natural gas reservoirs had proven a substantial redusction of pressure and, consequently, a relief of the tensions in the reservoirs. However, this study considers alternative geometries for NGV reservoirs, searching the minimization of dimensions and weight, remaining capacity to resist the tensions imposed by the new pressure situation. The proposed reservoirs parameters are calculated through a mathematical study of the internal pressure according to Brazilian standards (NBR) for pressure vessels. Finally simulations of the new geometries behavior are carried through using a commercially avaible Finite Element Method (FEM) software package ALGOR? to verify of the reservoirs efficincy under the gas pressure load / A investiga??o da viabilidade de se utilizar recipientes para armazenamento de g?s natural veicular (GNV), com geometrias diferentes dos padr?es comerciais, parte da necessidade de se aliar os benef?cios ambientais, financeiros e tecnol?gicos oferecidos pela combust?o do g?s, ? conveni?ncia de n?o se alterar a proposta original do autom?vel. O uso dos atuais modelos cil?ndricos para estocagem nos ve?culos convertidos justifica-se pelo excelente comportamento que essa geometria apresenta diante das tens?es provocadas pela alta press?o a que os referidos reservat?rios est?o submetidos. Entretanto, recentes pesquisas, voltadas para aplica??o de materiais adsorventes nos reservat?rios de g?s natural, comprovaram uma substancial redu??o de press?o e, consequentemente, um al?vio das tens?es nos reservat?rios. Diante desse contexto, este estudo prop?e geometrias alternativas para os reservat?rios de GNV buscando a minimiza??o das dimens?es e do peso, mantendo-se, por?m, a capacidade de resistir ?s tens?es impostas pela nova situa??o de press?o. Todos os par?metros geom?tricos dos reservat?rios propostos s?o calculados realizando o estudo matem?tico das tens?es internas de trabalho tomando como base ? norma brasileira (NBR). Por ?ltimo s?o realizadas simula??es do comportamento das novas geometrias fazendo uso do software comercial ALGOR? o qual se baseia no M?todo dos Elementos Finitos (MEF), para realizar a comprova??o da efici?ncia dos reservat?rios sob a press?o imposta pelo g?s