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Abstract(s)
A crescente concorrência e volatilidade entre fabricantes e mercados globais, fatores como a prototipagem rápida e virtual tornam-se indispensáveis para o sucesso de uma empresa. Esta dissertação apresenta um estudo numérico com recurso à dinâmica de fluidos computacional (CFD) numa caldeira de aquecimento doméstico a sob premissas semelhantes às do ensaio laboratorial que levou à sua certificação. O estudo é focado na transferência de calor existente, utilizando um modelo de combustão externo préexistente para a geração de calor. A integração externa do modelo de combustão permite simplificar significativamente o esforço computacional necessário para executar a simulação, atingindo os objetivos pretendidos. Os resultados dos dois ensaios são comparados para analisar a coerência entre ambos. Os principais dados analisados são a potência útil (energia absorvida para o fluido de trabalho, água) em função da potência de trabalho da caldeira (energia fornecida).
The increasing competition and volatility among manufacturers and global markets, factors such as rapid and virtual prototyping become indispensable to a company's success. This dissertation presents a numerical study using computational fluid dynamics (CFD) on a domestic pellet heating boiler under assumptions like those of the laboratory test that led to its certification. The study is focused on the existing heat transfer, using a pre-existing external combustion model for heat generation. The external integration of the combustion model allows to significantly simplify the computational effort required to run the simulation, achieving the intended goals. The results of the two tests are compared to analyze the consistency between them. The main data analyzed are the useful power (energy absorbed to the boiler coolant, water) as a function of the working boiler power (energy supplied).
The increasing competition and volatility among manufacturers and global markets, factors such as rapid and virtual prototyping become indispensable to a company's success. This dissertation presents a numerical study using computational fluid dynamics (CFD) on a domestic pellet heating boiler under assumptions like those of the laboratory test that led to its certification. The study is focused on the existing heat transfer, using a pre-existing external combustion model for heat generation. The external integration of the combustion model allows to significantly simplify the computational effort required to run the simulation, achieving the intended goals. The results of the two tests are compared to analyze the consistency between them. The main data analyzed are the useful power (energy absorbed to the boiler coolant, water) as a function of the working boiler power (energy supplied).
Description
Keywords
Biomassa Combustão Dinâmica de fluidos computacional (CFD) Equipamentos de aquecimento doméstico Modelo de eficiência térmica Prototipagem virtual Transferência de calor Biomass Combustion Computer Fluid Dynamics (CFD) Domestic Heating Equipment Thermal Efficiency Model Virtual prototyping Heat Transfer