Atmospheric Thermal Conductivities of Gases of Simple Molecular Structure.

Estimation of thermal conductivity of pure gases by using artificial neural networks

“…These correlations, in addition to temperature, critical temperature, critical pressure and molecular weight, require accurate values for the heat capacity at constant volume and also vapors viscosity which is usually not available for compounds at any temperature (e.g., carbon dioxide at 1500 K and carbon monoxide at 81.88 and 91.88 K in Table 5). Misic and Thodos [19,20] recommended two correlations for pure component, low pressure (<350 kPa) hydrocarbon gases. One of their correlations has been proposed for methane and cyclic compounds below reduced temperatures of 1.0, and the other one has been recommended for all hydrocarbons above reduced temperatures of 1.0.…”

“…The best architecture of the feedforward network, obtained by trial and 10.75 (1) Not used in the training of the proposed ANN. (2) The correlation of Misic and Thodos [19,20]. (3) The correlation of Bromley for pure non-hydrocarbon monatomic gases [21].…”

“…Misic and Thodos [19,20] For pure component, low pressure (<350 kPa) hydrocarbon gases, they recommend two correlations. One of them for methane and cyclic compounds below reduced temperatures of 1.0, and another for these hydrocarbons above reduced temperatures of 1.0 and for other hydrocarbons at any temperature.…”

Assessment of hydrofluoropropenes as insulating blowing agents for extruded polystyrene foams

“…The l s and l r are calculated based on the foam morphology as described elsewhere. 19 The thermal conductivity of the pure gas can be computed with Misic-Thodos equation, 20 and knowing the transport properties of the gas through the polymer, l g can then be calculated. The result is shown in Table 5.…”

Engineering Development of Fluid-Bed Fluoride Volatility Processes. Part 11. Off-Gas Analysis.

“…CP Equation 9 indicates that a larger Ak (as defined previously) will provide greater stability. Therefore, a carrier gas and an impurity gas of widely differing thermal conductivities are desirable.…”