Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1270939 | International Journal of Hydrogen Energy | 2012 | 6 Pages |
There will be significant temperature rise within hydrogen vehicle cylinder during the fast filling process. The temperature rise should be controlled under the temperature limit (85 °C) of the structure material (set by ISO/TS 15869), because it may lead to the failure of the structure. In this paper, a 2-dimensional axisymmetric computational fluid dynamics (CFD) model for fast filling of 70 MPa hydrogen vehicle cylinder is presented. The numerical simulations are based on the modified standard k − ɛ turbulence model. In addition, both the equation of state for hydrogen gas and the thermodynamic properties are calculated by National Institute of Standards and Technology (NIST) database: REFPROP 7.0. The thermodynamic responses of fast filling with different pressure-rise patterns and filling times within type III cylinder have been analyzed in detail.
► A CFD model for predicting filling process of 70 MPa cylinder is presented. ► Filling processes with different pressure-rise patterns are analyzed. ► Remarkable temperature gradient is found in interlaminar area between layers.