Numerical Study on Fast Filling of 70 MPA Hydrogen Vehicle Cylinder

Yong Zhi Zhao; Gesi Liu; Yanlei Liu; Jin Yang Zheng; Yuntang He

Abstract

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.

Funding source: This research is funded by the key project of national programs for fundamental research and development of China (973 program, Number: 2007CB209706), the high-technology research and development program of China (863 project, Number: 2009AA05Z118), and the Zhejiang Provincial Natural Science Foundation of China (Grant No. Y1100636).

Keywords: 70 Mpa ; Computational Fluid Dynamics ; Fast filling ; Fuelling/Refuelling ; Hydrogen Vehicles ; Numerical simulation ; Safety

Related subjects: Safety

Countries: China, People’s Republic