Non-dimensional Parameters for Temperature Characteristic during Rapid Refueling or Discharging Hydrogen at a High Pressure

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  • 高圧水素の急速充てん及び放出中の温度特性に関する無次元支配因子について
  • コウアツ スイソ ノ キュウソク ジュウテン オヨビ ホウシュツチュウ ノ オンド トクセイ ニ カンスル ムジゲン シハイ インシ ニ ツイテ

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A model was proposed to estimate temperature change during filling or discharging hydrogen into a tank by authors. It verifies to be a good agree-ment between the measured and estimated temperatures of hydrogen. Seven non-dimensional parameters, which govern the temperature change, are derived from the governing equations and are constituted from 14 parameters concerned with this process. One of them is a controlled one related to the pressure change or mass flow rate. Some case studies have been done based on a corresponding filling test using actual tanks. The effect of these parameters on the temperature characteristics has been clarified for the actual vessel during charging hydrogen up to 35MPa and 70MPa.

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