A New Correlation Method for Estimating Thermal Conductivity of Carbon Dioxide in Liquid, Vapor and Supercritical Phases

Hossein Rostamian,Mohammad Nader Lotfollahi

doi:10.3311/ppch.12754

Hossein Rostamian, Mohammad Nader Lotfollahi

Open Access

https://doi.org/10.3311/ppch.12754

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Abstract

In this study, a new correlation for estimating thermal conductivity (TC) of carbon dioxide was developed based on 2319 data points. The data points were at the temperature ranging from 250 to 1100 K, pressure ranging from 1 to 3000 bar and density ranging from 0.3 to 1400 Kg.m-3 in different phases of liquid, vapor and supercritical. The statistical parameters including average absolute deviation (AAD%), average percent relative error (ARE%), sum of absolute residual (SAR) and the coefficient of determination (R2) have been calculated to evaluate the accuracy of present correlation. The obtained values of AAD%, ARE%, SAR and R2 were 1.98, −0.64, 3510.1 and 0.995, respectively. The predictions of proposed correlation were also compared with three widely used correlations. The results showed that the proposed correlation is able to accurately calculate thermal conductivity of carbon dioxide. In addition, the proposed model is superior to all the existing empirical models considered.

Highlights

The accurate knowledge of transport properties plays an important role in process design
The results showed that the proposed correlation is able to accurately calculate thermal conductivity of carbon dioxide
L-CO2 and SC-CO2 can be applied to L-CO2 dry cleaning systems [7], liquid carbon dioxide fracturing process [8], enhanced oil recovery (EOR) [9], friction stir welding using liquid CO2 rapid cooling [10], and other applications as a refrigerant fluid [11]

Summary

Introduction

The accurate knowledge of transport properties plays an important role in process design. Thermal conductivity (TC) is one of the crucial parameters in process design due to its effects on heat transfer capability and energy efficiency [1, 2]. Liquid carbon dioxide (L-CO2) and supercritical carbon dioxide (SC-CO2) are good candidates as an environmentally friendly extraction solvent for essential oils and other herbal distillates [5, 6]. L-CO2 and SC-CO2 can be applied to L-CO2 dry cleaning systems [7], liquid carbon dioxide fracturing process [8], enhanced oil recovery (EOR) [9], friction stir welding using liquid CO2 rapid cooling [10], and other applications as a refrigerant fluid [11]

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Results

Conclusion