The sharply increasing use of carbon dioxide (CO2) in area of the trans-critical and supercritical technology urgently requires the study of thermophysical properties of CO2 near the critical point where the lack of the accuracy experimental data is very obvious. The thermal diffusivities of CO2 along six isobaric lines (p = 7.0, 7.5, 8.0 9.0 10.0 and 11.0 MPa) and in the temperatures from 293.15 to 406.15 K were measured around the critical point of CO2. The relative combined standard uncertainty in thermal diffusivity is estimated to be less than 0.01 over the whole examined p-T region. Moreover, the comparison between the experimental data and the calculated results from REFPROP 9.1 were made. The absolute average of relative deviation (AARD) between the experimental data and the calculated results is 3.51% in the investigated region of 0.980 less than T/TC less than 1.013 and 0.949 less than p/pC less than 1.503.
Compounds
#
Formula
Name
1
CO2
carbon dioxide
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
1
Thermal diffusivity, m2/s ; Fluid (supercritical or subcritical phases)
Temperature, K; Fluid (supercritical or subcritical phases)
Pressure, kPa; Fluid (supercritical or subcritical phases)