Measurements of Hydrogen Thermal Conductivity at High Pressure and High Temperature

• Published in: International journal of thermophysics Vol. 32; no. 9; pp. 1887 - 1917
• Main Authors: Moroe, S., Woodfield, P. L., Kimura, K., Kohno, M., Fukai, J., Fujii, M., Shinzato, K., Takata, Y.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.09.2011
• Subjects: Classical Mechanics; Condensed Matter Physics; Fittings; Heat transfer; Industrial Chemistry/Chemical Engineering; Least squares method; Mathematical analysis; Mathematical models; Physical Chemistry; Physics; Physics and Astronomy; Thermal conductivity; Two dimensional; Wire; Thermal conductivity; Transient short hot-wire method; High temperature; Hydrogen; High pressure
• ISSN: 0195-928X; 1572-9567
• DOI: 10.1007/s10765-011-1052-5

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  μ m. 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 %.