成果報告書詳細
管理番号20150000000500
タイトル*平成26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2015/11/21
報告書年度2014 - 2014
委託先名国立大学法人九州大学
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. (FY2013-FY2017) FY2014 Annual Report.

Subtheme 3:
A new method for refueling hydrogen into a high pressure tank has been developed. The new method makes it possible that the refueling can be completed in Hydrogen Refueling Station by monitoring the temperature in tank at any time using the measured temperature and mass flow rate for supplied hydrogen, only if an information on ambient temperature and tank volume is provided before refueling.
It is found that the new method is identical to the look-up table as well as totally reproduces it. The method makes controlling of level of precooling and average pressure ramp rate becomes more flexible than those in look-up table.
A look-up table for a fuel cell bus is produced using the H2fill software after analyzing several refueling test data which had been done in JARI to understand a corresponding refueling condition.

Subtheme 4: Data Acquisition of Hydrogen Transport Property for High Precision Simulation of Hydrogen Fueling.

Accurate transport properties of hydrogen are necessary for the simulation of filling processes of high-pressure hydrogen from HRSs to FCVs. A cryostat was originally developed for measuring viscosities and thermal conductivities of hydrogen at low temperatures, and the viscosities of hydrogen were measured by the vibrating wire method from 233 K to 298 K and at pressures up to 0.7 MPa. In this method, alternating voltages with different frequencies are supplied to a curved tungsten wire in the magnetic field, and the induced voltages are measured by a lock-in amplifier. The viscosities are determined from the obtained resonant curve according to the fundamental equations based on the Stokes equation. The wire’s effective diameter and internal friction coefficient are very sensitive parameters for evaluating the viscosities, and they were precisely calibrated by measuring helium and nitrogen as reference fluids. Finally, the obtained data show good agreement with an existing correlation within 2 %.
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