From the analysis of simulation res

From the analysis of simulation results, it can be concluded that when carbon dioxide is in a solid or liquid state, its thermal conductivity is very high, and a larger thermal conductivity is not conducive to pipeline transportation. As the pressure decreases or the temperature increases, it gradually transforms into a gaseous state. At this time, the thermal conductivity is the smallest, which is consistent with the properties of ordinary gases. However, when the temperature is higher than 30.95 ℃ and the pressure is higher than 7.39 MPa, Its thermal conductivity will increase compared to the gaseous state, but it is much smaller than that of liquid and solid state. Although the increase in thermal conductivity is not conducive to pipeline transportation compared to the gaseous state, the pipeline transportation efficiency of gaseous transportation decreases. In contrast, supercritical transportation is still a favorable choice for pipeline transportation.