成果報告書詳細
管理番号20140000000179
タイトル*平成25年度中間年報 水素利用技術研究開発事業 燃料電池自動車及び水素供給インフラの国内規制適正化、国際基準調和・国際標準化に関する研究開発 燃料電池自動車への水素充填時における過充填防止のための措置に係る技術基準の見直し等に関する研究開発
公開日2015/4/29
報告書年度2013 - 2013
委託先名国立大学法人佐賀大学
プロジェクト番号P13002
部署名新エネルギー部
和文要約
英文要約Title : Research and Development of Technology for Hydrogen Utilization/ Research and Development for Optimization of Domestic Regulation, International Harmonization and International Standardization for FCV and Hydrogen Infrastructure/ Research and Development of Technical standards Review Regarding Preventive Measures of Overfilling on Hydrogen fueling for FCV
Subtheme 3: Development of Fueling Technologies/ Validation of Fueling Technologies
(1) Development of New Fueling Protocol, Improvement of Fueling Protocol
(2) Development of Simulation on Optimization of Hydrogen Station

1-1 Comparison between measured and estimated temperatures
The measured temperature at a position of 4.2 below the exit of the precooling at Toho hydrogen station is corrected using the calibrated equation, which was proposed based on calibration experiment in Saga University in 2012. It is verified that the corrected temperature during fueling hydrogen can be surely predicted by newly developed software. A transient heat transfer occurs within a first 20 second, after which a steady one follows. After 20 second, hydrogen temperature hardly drops in flowing through an insulated pipe of 4.2 m.

1-2 Transient heat transfer in precooling equipment
When hydrogen at a temperature suddenly flows into a precooling equipment at about - 40 Celsius, a transient heat transfer occurs resulting into hydrogen temperature at the exit of the precooler much lower than that predicted by the steady state condition. A software has been newly developed by taking account into this transient effect. The new software successfully predicts the transient temperature being agreement with the measured temperature at Toho hydrogen station in 2012.

1-3 Correction of governing equation
The existing governing equation ignores a work due to an expansion of high pressure tank. However, the work due to the expansion of about 4 % brings the hydrogen temperature into about seven to eight Kelvin lower. This effect is verified by comparing the measured and simulated temperatures. In addition to this, in the case that mass flow rate is momently provided, the inlet enthalpy can be calculated during fueling and then if the heat transfer rate from hydrogen into the wall can be also calculated, then the amount of internal energy in the tank can be estimated through the governing equation, and the specific internal energy can be also calculated by dividing the amount of internal energy by the stored mass. At a result, the hydrogen temperature in the tank can be calculated from the specific internal energy and the measured pressure.
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