Speeds of sound for ($C{H}_4$ + $He$) mixtures from $p$ = (0.5 to 20) MPa at $T$ = (273.16 to 375) K

Abstract

This work aims to provide accurate and wide-ranging experimental new speed of sound data $w$($p$,$T$) of two binary ($C{H}_4$ + $He$) mixtures at a nominal helium content of 5% and 10% at pressures $p$ = (0.5 up to 20) MPa and temperatures $T$ = (273.16, 300, 325, 350 and 375) K. For this purpose, the most accurate technique for determining speed of sound in gas phase has been used: the spherical acoustic resonator. Speed of sound is determined with an overall relative expanded ($k$ = 2) uncertainty of 230 parts in $10^6$ and compared to reference models for multicomponent natural gas-like mixtures: AGA8-DC92 and GERG-2008 equations of state. Relative deviations of experimental data from model estimations are outside the experimental uncertainty limit, although all points are mostly within the AGA uncertainty of 0.2% and GERG uncertainty of 0.5% and worsen as the helium content increases. Absolute average deviations are better than 0.45% for GERG and below 0.14% for AGA models in (0.95 $C{H}_4$ + 0.05 $He$) mixture and below 0.83% for GERG and within 0.22% for AGA equations in (0.90 $C{H}_4$ + 0.10 $He$) mixture.

References in corpus (2)

• Updated determination of the molar gas constant $R$ by acoustic measurements in argon at UVa-CEM
• Speeds of sound for a biogas mixture $C{H}_4$ + $N_2$ + $C{O}_2$ + $CO$ from $p$ = (1-12) MPa at $T$ = (273, 300 and 325) K measured with a spherical resonator

Cited by in corpus (4)

• Speed of sound for three binary ($C{H}_4$ + $H_2$) mixtures from $p$ = (0.5 up to 20) MPa at $T$ = (273.16 to 375) K
• Speed of sound data and acoustic virial coefficients of two binary ($N_2$ + $H_2$) mixtures at temperatures between (260 and 350) K and at pressures between (0.5 and 20) MPa
• Speed of sound and phase equilibria for ($C{O}_2$ + $C_3{H}_8$) mixtures
• Speed of sound data, derived perfect-gas heat capacities, and acoustic virial coefficients of a calibration standard natural gas mixture and a low-calorific $H_2$-enriched mixture