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成果報告書詳細
管理番号20170000000186
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
委託先名国立研究開発法人産業技術総合研究所
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-FY2015) FY2015 Annual Report

We performed the evaluation examination of the master meter to carry out the standardization with the alternative gas in this fiscal year. Nitrogen gas was used as alternative gas for high-pressure test. We tried to reduce a pulsation by the buffer with rectifier, because it was confirmed that the pulsation with a liquid pump used with high-pressure nitrogen flow test facility which had the influence on the test flow. As a result, the pulsation amplitude was reduced to 1/10. The discharge coefficient characteristics of the critical nozzle which was used as the standard, was not indicated drastic change and its reproducibility was confirmed, though it could be expected that the calibration uncertainty was going to be decreased.

We also performed the characteristic evaluation tests on the discharge coefficient of the critical nozzle, due to some results of CFD analysis provided by the co-researcher. In the high pressure area, the results of discharge coefficient decreased as the upstream test pressure increased, and was deviated from "the universal curve" which was called in the ISO9300. These results were carried out using hydrogen three different high-pressure examination facilities, and enough reproducibility has been confirmed. Because it seemed to be difficult to be assumed that the flow was ideal gas, we calculated the discharge coefficient that considered a real gas effect using a method of Johnson. As a result, the decrease degree of discharge coefficient was small, however, the tendency was the same as the case that assumed ideal gas. It is considered that the thermodynamic quantities such as the compression coefficient and the critical flow function contribute to the decrease.

We carried out an deviation evaluation test of coriolis meter among three different manufacturer. As a result, it was less than 3% about a deviation for the pulse output. We are planning to more detailed tests in the next fiscal year.
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