| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 7.98 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
O presente trabalho tem como objetivo a análise do escoamento de hidrogénio gasoso, a caudal
mássico constante, em um tanque a alta pressão através de simulações numéricas. Para tal
realizou-se um estudo intensivo do estado da arte sobre abastecimento de hidrogénio e ainda de
simulações computacionais de fluidos. Através desse estudo foi possível um melhor entendimento
dos fenómenos que ocorrem durante o abastecimento bem como os parâmetros importantes para
a simulação atual. Dos resultados foi possível retirar-se que o modelo construído para a simulação
apresentava bons resultados com o artigo de base para validação. Concluiu-se também que existe
uma relação linear de aumento de temperatura em casos com o mesmo caudal mássico e não
adiabáticos. As velocidades encontradas no tubo de Inlet podem levar a drásticas mudanças na
temperatura estática do fluido nessa zona, devido ao seu efeito compressível. Tanto a consideração
de paredes adiabáticas como a escolha de um polímero para o forro do tanque levam a aumentos
de temperatura elevados. Concluiu-se ainda que o aquecimento do hidrogénio devido ao efeito
Joule-Thomson foi negligenciável.
The present work aims to analyze the flow of hydrogen gas, at constant mass flow rate, in a high pressure tank through numerical simulations. To this end, an intensive study of the state of the art on hydrogen supply and computational fluid simulations was carried out. Through this study it was possible to better understand the phenomena that occur during fueling as well as the important parameters for the current simulation. From the results it was possible to conclude that the model built for the simulation presented good results with the base article for validation. It was also concluded that there is a linear relationship of temperature increase in cases with the same mass flow rate and non-adiabatic. The velocities found in the Inlet tube can lead to drastic changes in the static temperature of the fluid in this zone, due to its compressible effect. Both the consideration of adiabatic walls and the choice of a polymer for the tank lining led to high temperature increases. It was also concluded that the heating of hydrogen due to the Joule-Thomson effect was negligible.
The present work aims to analyze the flow of hydrogen gas, at constant mass flow rate, in a high pressure tank through numerical simulations. To this end, an intensive study of the state of the art on hydrogen supply and computational fluid simulations was carried out. Through this study it was possible to better understand the phenomena that occur during fueling as well as the important parameters for the current simulation. From the results it was possible to conclude that the model built for the simulation presented good results with the base article for validation. It was also concluded that there is a linear relationship of temperature increase in cases with the same mass flow rate and non-adiabatic. The velocities found in the Inlet tube can lead to drastic changes in the static temperature of the fluid in this zone, due to its compressible effect. Both the consideration of adiabatic walls and the choice of a polymer for the tank lining led to high temperature increases. It was also concluded that the heating of hydrogen due to the Joule-Thomson effect was negligible.
Description
Keywords
Hydrogen hydrogen filling hydrogen storage CFD simulation constant mass flow rate