Thermodynamic Functions of Carbon Dioxide. Joule-Thomson Coefficient, Isochoric Heat Capacity, and Isentropic Behavior at 100° to 1000° C. and 50 to 1400 Bars

Prediction of Thermodynamic Properties of CO2 by Cubic and Multiparameter Equations of State for Fluid Dynamics Applications

“…Figure illustrates the inversion curve predicted by the four equations of state (SRK, PR, HG, SP) against the experimental data from the literature (Table ). The data from Price present a slope at high temperatures and, as observed by Chacin et al, the SP EOS seems to follow this slope, unlike the other investigated EOS. Colina and Olivera-Fuentes investigate this behavior and conclude that the predictions of the SP at high temperatures are incorrect, arguing that the ability of an EOS to successfully predict the high temperature branch of the inversion curve is directly related to its second and third virial coefficients.…”

“…The Joule-Thomson coefficient on the other hand, only informs if the fluid is heated or cooled. The method is validated with experimental data from Price as discussed in the previous section. The relative deviations between the interpolated experimental data (Figure ) and the prediction by the four studied EOS against inlet temperature are summarized in Figure for several inlet pressures ( ) and pressure drop ( ) conditions.…”

“…To validate the proposed method for computing the throttling temperature and to ascertain the best EOS to predict it, experimental data from the literature are used. Price published Joule-Thomson coefficients computed from experimental measurements, according to the following equation, which is obtained from eq : The tabulated data give the Joule-Thomson coefficient for several pressure and temperature conditions, instead of the outlet temperature ( ) as a function of inlet conditions ( ) and pressure drop ( ). To ascertain the experimental value of for a given inlet condition and pressure drop, however, it is necessary to interpolate the data from Price using the algorithm proposed in Figure .…”

“…Price published Joule-Thomson coefficients computed from experimental measurements, according to the following equation, which is obtained from eq : The tabulated data give the Joule-Thomson coefficient for several pressure and temperature conditions, instead of the outlet temperature ( ) as a function of inlet conditions ( ) and pressure drop ( ). To ascertain the experimental value of for a given inlet condition and pressure drop, however, it is necessary to interpolate the data from Price using the algorithm proposed in Figure . An initial guess for assumes that it is equal to , then the Joule-Thomson coefficient at the inlet ( ) and outlet conditions ( ) are read from the experimental data .…”

“…To ascertain the experimental value of for a given inlet condition and pressure drop, however, it is necessary to interpolate the data from Price using the algorithm proposed in Figure . An initial guess for assumes that it is equal to , then the Joule-Thomson coefficient at the inlet ( ) and outlet conditions ( ) are read from the experimental data . The estimate of is updated based on the mean value of the Joule-Thomson coefficient until the value of does not change significantly between successive predictions.…”