Page 440 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2
P. 440

404    Production

                                                            ( ) lnitlal assumptkm of
                                Enter wlth x  0,             dependent verleble
                                              P



                                   Assume vapor
                                 phase mposltlon



                                 Calculate K values
                              ’
                                  at T, P, XI.  yI



                                     and  fy,












                                  Adjust dependent                          EXiitWithY,,
                                     vdable                                  P, and T




                                 phase comp-




                              Figure 6-24.  Block diagram for  bubble point calculations.

                     As  in the bubble point calculation, several  different values  of  the  dependent
                     variable  are assumed

                                                                                   (6-21)

                     subject to  the condition that

                       IXY+’-~Y~~;E,  i=lton                                       (6-22)

                       A logical diagram for dew  point calculation sequence is  shown in Figure 625.
                     In  this case 3 is  initially &own   and must  be  assumed.  A  procedure  is  to
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