Measurement and correlation of the thermal conductivities for several dense fluids and mixtures.

Abstract

A coaxial cylindrical cell was constructed for measuring thermal conductivities of nine pure fluids (argon, nitrogen, oxygen, helium, carbon dioxide, methane, ethane, ethylene and propane) at temperatures ranging from 25 to 76°C under pressures up to 17.5MPa. Thermal conductivities of two binary mixtures (argon-nitrogen and methane-ethylene) were also measured at 30.6, 50.6 and 76.6°C under pressures up to 9.8 MPa. The apparatus was calibrated with eight kinds of gases. The Stiel-Thodos and Crooks-Daubert correlations were applied to predict the effect of pressure on the thermal conductivity of pure fluids. They were also extended to the mixtures by use of the van der Waals one-fluid model. Fairly good agreement was obtained with the experimental data as well as those from the literature except in the vicinity of the critical region.

Intermolecular potential energy surface and thermophysical properties of propane

“…6, the thermal conductivity values obtained using the adjusted potential function, λ adj , are compared with those obtained using the unadjusted one, λ unadj , with a large number of experimental data sets, [63][64][65][66][67][68][69][70][71][72][73][74][75] with the zero-density part of the correlation of Marsh et al, 74 and with the recommended reference values of Younglove and Ely. 76 We extrapolated the data of Zheng et al 72 at 323.75 K and the steady-state hot-wire data of Marsh et al 74 to zero pressure. The transient hot-wire data of Marsh et al from the same paper 74 are not included in the comparison because these authors found them to be affected by large systematic errors in the dilute gas phase.…”

Reference Correlations of the Thermal Conductivity of Ethene and Propene

“…Measurements at higher temperatures were also performed by Senftleben 36, 38 and Senftleben et al 40 in a concentric–cylinder instrument with an uncertainty of 1–2%. Concentric–cylinder instruments were also employed by Zheng et al , 29 Yorizane et al , 30 and Lenoir and Comings 39 with uncertainties of 3, 3, and 1.5% respectively; thus these sets were also included in the primary data sets. The measurements of Lambert et al , 37 performed in a hot–wire apparatus have been successfully employed in previous reference correlations.…”

“…For exactly this reason, all other measurements performed in transient hot–wire or hot–wire instruments in the dilute-gas region were not included in the primary data set. The remaining investigators 29, 30, 36, 38–40 in the primary–data section of Table 1, who performed measurements with different instruments (other than THW) in the low–pressure low–density gas region, were included as primary data in the correlation. These measurements were employed together with Eqs.…”

“…Millat et al 14 (●), Zheng et al 29 (⬙), Yorizane et al 30 (⬖), Senftleben 36 ( ), Senftleben 38 (⬓), Lenoir and Comings 39 (◑), Senftleben et al 40 , Eq. (13) (––), and correlation of Holland et al 13 (- -).…”

“…(1), (5)–(9), and (13), as a function of temperature. Millat et al 14 (●), Zheng et al 29 ( ), Yorizane et al 30 (⦵), Prasad and Venart 31 (□), Vargaftik and Vanicheva 32 (⏀), Tarzimanov and Lozovoi 33 (▲), Tarzimanov and Arslanov 34 (△), Golubev et al 35 (+), Senftleben 36 (⬘), Lambert et al. 37 (⬓), Senftleben 38 (◨), Lenoir and Comings 39 (◒), Senftleben et al 40 (◧), Borovick 41 (◑), Borovick et al 42 (◓), Eucken 43 ( ).…”