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General model of PR thermal conductivity and its analysis of precision prediction
CHEN Shuang, GUO Xu-qiang
(College of Chemistry and Chemical Engineering in China University of Petroleum,Dongying 257061, Shandong Province,China)
Abstract:
A general model of thermal conductivity based on PR EOS was developed. It is applicable to both gas phase and liquid phase in a wide temperature range from 80 to 1400 K and pressure range from 0,1 to 350 MPa. The calculation results of 3 263 data points for pure hydrocarbons, carbon dioxide and nitrogen indicate a overall average relative error of 7.34 %. The overall average relative error of calculated thermal conductivity data for 12 binary mixtures and a ternary mixtures of 260 data points is 7. 94%. The overall average relative error of thermal conductivity for three-petroleum cut is 9,68%. The overall average relative error for polar pure substance of 810 data points is 6.86% . The overall average relative error for polar binary mixture of 439 data points is 6.03 %. Compared with the existing typical thermal conductivity correlations, significant improvement is showed in precision?
Key words:  thermal conductivity  general model  prediction