论文部分内容阅读
Throughout the study,we calculated the experiment data for 21 pairs of vapor-liquid equilibrium which are the principal components (methane,ethane,propane,butane,pentane,nitrogen,and carbon dioxide) of natural gas by using the binary interaction parameters (BIPs) of the Peng-Robinson (PR) equation of state,which is built into HYSYS release 8.0 process simulator.We set the objective function for the bubble point pressure as the variation and compared it with the results acquired through regression analysis.In order to make the comparison,we utilized the critical temperature and critical pressure values from the HYSYS and utilized the new alpha function proposed by Twu in order to calculate the steam pressure according to temperature.Also,we calculated the AAD (absolute average deviation) % of the newly defined binary interaction parameter value and the original binary interaction parameter value from HYSYS in order to compare the accuracy of vapor-liquid equilibrium experimental data and the comparison results showed the newly defined binary interaction parameter to be more accurate than the original binary interaction parameter from HYSYS.