Experimental investigation of the thermal conductivity of organic fluids at low temperatures

Thermal conductivity correlations for minor constituent fluids in natural gas: n-octane, n-nonane and n-decane

“…These wide-range data sets [62,65] were made with a steadystate technique and agree well with the recent transient hotwire measurements at more moderate temperatures. There is also the characteristic change in slope of the deviations with respect to temperature and density for some data sets, such as those of Brykov and Mukhamedzyanov [26] and Mallan et al [33], in the liquid phase from 300 to 320 K. This is not as distinct as it was for n-octane and n-nonane but still seems to be present.…”

“…These wide-range data sets [22,23,36] were made with steady-state techniques and agree well with the recent transient hot-wire measurements at more moderate temperatures. It is apparent in both figures that the temperature and density dependencies of measurements by various researchers differ from each other and the correlation near 320 K. The most dramatic examples are the data sets of Mukhamedzyanov et al [34,35] and Nieto de Castro et al [38,39] compared to the data sets of Brykov and Mukhamedzyanov [26], Calado et al [27], and Mallan et al [33]. It is noted that the primary dilute vapor data of Carmichael and Sage [21] have a temperature dependence that differs from that of the correlation, with a maximum deviation of 4.9%.…”

“…These measurements were made with a transient hot-wire apparatus with an estimated uncertainty of 0.5% over the temperature range 259-337 K. In addition, the atmospheric pressure, liquid-phase measurements of Brykov and Mukhamedzyanov [26], and the high pressure measurements of Menashe and Wakeham [55] were also selected as primary data. Menashe and Wakeham [55] used a transient hot-wire apparatus with estimated uncertainty of 0.7% to measure the thermal conductivity of n-nonane at pressures up to 503 MPa, but did not measure the saturation boundary.…”

Reference Correlations of the Thermal Conductivity of Cyclopentane,iso-Pentane, andn-Pentane

“…A hot-wire instrument was employed by Mukhamedzyanov et al 57 of this investigator were successfully employed in previous thermal-conductivity reference correlations, [6][7][8][9] and thus were included in the primary dataset. Finally, a concentric-cylinder instrument was employed by Naziev et al 54 at high temperatures, and by Naziev et al 55 and Brykov et al 58 at low temperatures, with uncertainties of less than 2%. Measurements of Naziev et al 54,55 were included in previous thermal-conductivity reference correlations, [6][7][8]10 while those of Brykov et al 58 were employed in the reference correlations of ethanol 9 and ethylbenzene.…”

A proposal for thermal conductivity standards with special respect to convection and radiation effects

“…The experimental data combined in Fig. 1 however have been obtained with different methods; the data of Brykov et al [3] with a steady state hot wire method, those of Ganiev and Rastorguev [4], Geller et al [5], Rastorguev et al [6], and Leidenfrost [7] with a vertical concentric cylinder device, those of Poltz and Jugel [8], Sch6del and Grigull [9], Gurenkova et al [10], and Ogiwara et al [11] with a parallel plate device and our own values with a rotating horizontal cylinder device [12]. Because of the variety of the measuring devices it is scarcely possible that the systematic increase of thermal conductivity with layer thickness, as presented in Fig.…”