Modelling of hydrogen induced pressurization of internal cavities - Mines Saint-Étienne Access content directly
Journal Articles International Journal of Hydrogen Energy Year : 2017

Modelling of hydrogen induced pressurization of internal cavities

Abstract

Internal cavities can constitute a crack initiation site especially if filled with hydrogen at high pressure. A new refined equation of state based on recent NIST database has been introduced in order to model the equilibrium pressure. It is based on a thermodynamic definition of fugacity and uses the NIST data relating hydrogen density and pressure to define a new fugacity pressure quadratic dependence. The resulting Equation Of State (EOS) is compared to the standard Abel Noble EOS and it is shown that for a given fugacity, imposed by a Sievert's law, the corresponding pressure is significantly higher. This new refined EOS was introduced into a previously developed numerical model of hydrogen diffusion and desorption and applied to evaluate the kinetics of pressure build-up within a cavity and its equilibrium pressure. It has been shown that the kinetics of pressure buildup at room temperature, which reaches values close to equilibrium in some hundreds of hours, is compatible with the industrial quality control procedures. The calculated pressures are in the range 4500-8650 bars depending on hydrogen solubility, which differs between the matrix and the segregation bands, and tend to equilibrium values obtained from mass balance approach.
Fichier principal
Vignette du fichier
sezgin2017.pdf (500.03 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

emse-01578818 , version 1 (29-10-2022)

Licence

Attribution - NonCommercial

Identifiers

Cite

Jean-Gabriel Sezgin, Cédric Bosch, Aurore Montouchet, Gilles Perrin, Krzysztof Wolski. Modelling of hydrogen induced pressurization of internal cavities. International Journal of Hydrogen Energy, 2017, 42 (22), pp.15403-15414. ⟨10.1016/j.ijhydene.2017.04.106⟩. ⟨emse-01578818⟩
46 View
28 Download

Altmetric

Share

Gmail Facebook X LinkedIn More