从模拟结果分析得知：当二氧化碳处于固态或者液态时其导热系数很大，而较大

从模拟结果分析得知：当二氧化碳处于固态或者液态时其导热系数很大，而较大的热传导系数是不利于管道输送的，随着压力的降低或者温度的升高，逐渐转变为气态，此时的导热系数最小，这和一般气体的性质相吻合，但是当温度高于30.95℃、压力高于7.39MPa的情况下，其导热系数与气态相比会有所增加，但是远远小于液态与固态的，虽然导热系数的增加相比气态不利于管道输送，但是气态输送的管道输送效率降低，相比之下，超临界输送还是处于有利于管道输送的选择。

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.

From the analysis of the simulation results, it is known that when carbon dioxide is in solid or liquid state, its thermal conductivity is very large, but the larger thermal conductivity is not conducive to pipeline transportation. With the decrease of pressure or the increase of temperature, it gradually changes into gas state, and the thermal conductivity is the smallest at this time, which is consistent with the properties of general gas, but when the temperature is higher than 30.95℃ and the pressure is higher than 7.39MPa, its thermal conductivity will increase compared with gas state. However, it is far less than that of liquid and solid. Although the increase of thermal conductivity is not conducive to pipeline transportation, the pipeline transportation efficiency of gaseous transportation is reduced. In contrast, supercritical transportation is still in a favorable choice for pipeline transportation.