DIERS Benchmarks

Two-phase High Viscosity Frozen Flow

The DIERS two-phase  high viscosity frozen flow involves, constant viscosity at 1000 cP, saturated water at 72.2 psia relieving pressure with 72.5 psia being a nitrogen blanket.  The flow is frozen meaning that there is no flashing of the saturated water.  The water is saturated at 725 psia.  The water will not flash but the nitrogen will expand as the pressure decrease as it flows through the inlet pipe, enters the nozzle, and exits the discharge pipe.  The physical properties are based on saturated water at 72.5, viscosity of lqiuid is a constant 1000 cP, and the nitrogen gas based on its specific volume changes as it enters inlet pipe, the relief nozzle, and exits the discharge pipe.   The saturated water properties at 72.5 psia and 305.5 o F,  remain constant throughout the flow path.  Only the nitorgen will expand.

Mach II Results for Nitorgen blanket            Downlaod

High Viscosity Frozen Flow (case 11)

                      Flow rate (lbs/hr)              Choke (psia)           Quality (x)            Inlet dP / %Pset             Outlet dP /% Pset         Piping

                            233,198                              41.2                      0.01                         ----------                           ----------                     nozzle N

                            211,309                              37.5                      0.01                         6.0 / 11.5                          2.7 / 5.2                   4 X 6  N

                            225,933                              40.0                      0.01                         2.3 / 4.4                             3.1 / 5.9                   6 X 6  N

                            227,532                              40.2                      0.01                         1.8 / 3.4                             3.2 / 6.0                   8 X 6  N

DIERS Results

RRERSP            217,450                               40.9                     0.01                              -------                                   -------                     nozzle N

RRERSP            194,717                               36.4                     0.01                          6.8 / 13.0                           2.1 / 4.0                   4 X 6   N

RRERSP            214,628                               38.0                     0.01                          1.7 / 3.2                              2.7 / 5.2                   6 X 6  N                  

RRERSP            213,764                                40.2                    0.01                           0.6 1.1                                2.7 / 5.2                   8 X 6  N    

       

                        

                                                      

                   

        

72.5 psia Nitrogen blanket 4 X 6  nozzle with inlet & outlet piping

72.5 psia Nitrogen blanket: Nozzle only Maximum Flowrate

72.5 psia Nitrogen blanket with 6 X 6 Nozzle & Piping

72.5 psia nitorgen blanket with 8 X 6 Nozzle and Piping

Physical Properties 72.5 psia Steam blanket

Steam blanket nozzle only maximum flowrate

72.5 psia Steam baanket 4 X 6 Nozzle and Piping

72.5 psia Steam blanket and 6 X 6 Nozzle and Piping

Inlet / Nozzle  and Outlet Physical Property Data

Outlet piping physical property data