Measurements of Hydrogen Thermal Conductivity at High Pressure and High Temperature

Autor: Jun Fukai, Kanei Shinzato, Koichi Kimura, Yasuyuki Takata, Shogo Moroe, Motoo Fujii, Masamichi Kohno, Peter Woodfield
Rok vydání: 2011
Předmět:
Zdroj: International Journal of Thermophysics. 32:1887-1917
ISSN: 1572-9567
0195-928X
DOI: 10.1007/s10765-011-1052-5
Popis: The thermal conductivity for normal hydrogen gas was measured in the range of temperatures from 323 K to 773 K at pressures up to 99 MPa using the transient short hot-wire method. The single-wire platinum probes had wire lengths of 10 mm to 15 mm with a nominal diameter of 10 μm. The volume-averaged transient temperature rise of the wire was calculated using a two-dimensional numerical solution to the unsteady heat conduction equation. A non-linear least-squares fitting procedure was employed to obtain the values of the thermal conductivity required for agreement between the measured temperature rise and the calculation. The experimental uncertainty in the thermal-conductivity measurements was estimated to be 2.2 % (k = 2). An existing thermal-conductivity equation of state was modified to include the expanded range of conditions covered in the present study. The new correlation is applicable from 78 K to 773 K with pressures to 100 MPa and is in agreement with the majority of the present thermal-conductivity measurements within ±2 %.
Databáze: OpenAIRE
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