Reliability of Lumped Thermodynamic Hydrogen Fueling Model under Slow-Fill Conditions

Taichi Kuroki, Kazunori Nagasawa, Shaun Onorato, Katherine Hurst, Naoya Sakoda, Yasuyuki Takata, Masanori Monde

Research output: Contribution to journalArticlepeer-review


This study verifies the reliability of lumped thermodynamic fuel cell electric vehicle (FCEV) tank model under considerably slow-fill conditions. Many countries put efforts into research and development of FCEVs. As part of the efforts, thermodynamic hydrogen fueling models have been developed to understand the hydrogen temperature in the onboard tanks of FCEVs during the fueling process. Most of the models treat the hydrogen inside the tanks to be a lumped system and assume the hydrogen temperature to be uniform throughout the tanks. In other words, the hydrogen temperature is treated as average bulk temperature. This study certifies whether treating the hydrogen temperature in a tank as the bulk gas temperature is suitable by evaluating the temperature distributions inside the tank by a three-dimensional computational fluid dynamics (3D CFD) model.
Original languageAmerican English
Pages (from-to)59-65
Number of pages7
JournalNetsu Bussei
Issue number2
StatePublished - 2023

NREL Publication Number

  • NREL/JA-5700-84433


  • fueling model
  • hydrogen fueling
  • temperature


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