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 liquid 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 nitrogen will expand.
Mach II Results for Nitrogen blanket Download
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 blanket 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
