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成果報告書詳細
管理番号20170000000282
タイトル*平成28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ステーション用低コスト機器・システム等に関する研究開発 水素ステーションにおける水素計量管理方法に関する研究開発
公開日2017/6/7
報告書年度2016 - 2016
委託先名岩谷産業株式会社
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 Low Cost Facilities and Systems for FCV and Hydrogen Infrastructure / Research and development of metrological control techniques at hydrogen supplying station (FY2013-FY2017) FY2016 Annual Report

We produced the standard critical nozzle which we could use with high pressure hydrogen and evaluated it. The increase of the theoretical Reynolds number with the increase in pressure decreased the coefficient of discharge. However, the increase of the theoretical Reynolds number with the decrease in temperature did not let the coefficient of discharge. We performed the gas temperature impact statement using a Coriolis-type flowmeter. It was the result that we could measure without influencing gas temperature. We built the examination facilities which evaluated a flowmeter using high pressure hydrogen (40MPa) newly. We can measure it for maximum flow rate to 1,000g/min.(Iwatani Co.)
Development of CFD code that can predict coefficient of discharge in the range from low to high Reynolds number accurately is important. In computations of the flow field, Redlich-Kwong equation of state (EOS) and EOS proposed by Sakoda et al. were employed to take account of real gas effects. As the results, coefficient of discharge increased with a decrease of the stagnation temperature in cases of hydrogen and helium gases. Further, coefficient of discharge for hydrogen in case of constant stagnation pressure increased with a decrease of the stagnation point temperature. A tendency of increase of Cd with a decrease of stagnation temperature did not depend on the throat diameter in case of hydrogen gas and Cd for Reynolds number < 105 did not depend on the throat diameter. On the other hand, in the high Reynolds number region (Re>105), the coefficient of discharge increased with throat diameter. (Saga Univ.)
The speed-of-sound of hydrogen at room temperature and pressures up to 20 MPa has been measured by the spherical resonator method. The speed-of-sound of nitrogen at pressures up to 0.5 MPa was also measured to confirm the reliability of the present measurement, and the obtained data are in good agreement with a reliable equation of state (EOS) within 0.1 %. The present measurement is estimated to be performed with an uncertainty less than 0.1 %. The virial EOS of hydrogen used in the CFD analysis of the sonic nozzle flow meter agrees with most of the obtained data within 0.1 %. The reliability of the virial EOS at room temperature and pressures up to 20 MPa was confirmed.(Kyushu Univ.)
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