成果報告書詳細
管理番号20100000002026
タイトル*平成21年度中間年報 水素先端科学基礎研究事業
公開日2011/6/23
報告書年度2009 - 2009
委託先名国立大学法人九州大学 独立行政法人産業技術総合研究所
プロジェクト番号P06026
部署名燃料電池・水素技術開発部
和文要約和文要約等以下本編抜粋:(1)「高圧水素物性の基礎研究」1.研究開発の内容及び成果等 平成21年度の研究成果は、実測による物性値データをもとに、PVT性質においてはビリアル状態方程式の作成に成功し、粘性係数および熱伝導率においては既存の推算法を修正し、今後得られる実測データを基にさらに精度の高い推算法を確立する基礎を築いた。そして、得られた状態方程式および推算式を水素熱物性データベースに組み込み、プロトタイプを充実した。「高圧水素物性データベース、水素物性推算ツール活用セミナー」を開催した。
英文要約Title:“Fundamental Research Project on Advanced Hydrogen Science”(FY2009-2010)FY2009 Annual Report
(1)Hydrogen Thermophysical Properties Team
Development of experimental apparatus and the measurements of some thermophysical properties have been done. A prototype of hydrogen thermophysical property database was developed. The findings are summarized as follows:
(1) The PVT characteristics measurements by the Burnett-type apparatus has been done in the range up to 100MPa and 473K(200C) . A virial type equation of state (EOS) has been developed from 220 K to 473 K and up to 100 MPa by using the measured data, which can represent PVT property data within 0.1%.
(2) After improving the apparatus, the measurement of viscosity of nitrogen and hydrogen from room temperature to 400K and up to 99MPa were measured. The data measured can represent the viscosity by REFPROP within 2%. Based on the available literature, an accurate correlation equation for hydrogen viscosity has been developed.
(3) Thermal conductivity of mixture of para- and orthohydrogen has been measured in the range of 0.3-0.7MPa and 80-300K. The dependence of thermal conductivity on the composition of para- and orthohydrogen was obtained. The thermal conductivity increases with the increase in the composition of parahydrogen and on the other hand, thermal diffusivity does not depend on the composition.
A new apparatus has been developed for high pressure region. In FY2010, thermal conductivity will be measured in the range up to 99MPa and up to 773K.
(4) Solubility and diffusivity of hydrogen in nitrile-butadiene rubber has been measured in the environment of hydrogen in pressure of 0.7MPa by NMR. The solubility is in proportion to hydrogen pressure and, on the other hand, diffusivity of hydrogen does not depend on pressure.
Solubility of hydrogen in KOH solution has been measured using a dissolved hydrogen meter for pressures below 29MPa. As the concentration of KOH increases, the solubility of hydrogen decreases.
(5) Two types of database for thermophysical properties of hydrogen have been developed and improved. A new virial equation of state by Sakoda and correlation equations for viscosity and thermal conductivity have been added to the hydrogen thermophysical property database of MS-EXCEL add-on type. For “All-in-One CD” man-machine interface has been improved by making use of CGI program.
(6) Dew point measurement system has been developed and tested up to 5MPa. The characteristics of frost formation in hydrogen with 20-150ppm water vapor as impurity were obtained and then the image analyzing process was optimized.
(7) Some possible measurement methods for specific heat capacity of hydrogen were examined and the related information was collected.
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