Process description for the GG5 example simulation

In this system, the process, which we represent by two drums (V1 and V2), is depressurized through a valve, XV5, in an emergency situation. Due to the high initial pressure, the fluid temperature becomes very cold while depressurizing and is further reduced due to a Joule-Thomson expansion across XV5. As a result, the metal temperature of the pipe wall cools due to heat transfer with the cold fluid. Since there is a finite holdup in the drums, the pipe does not reach a steady-state solution and the flow diminishes as the inventory in the drums depletes. We must determine which sections of the pipe require stainless steel and which sections can use carbon steel, with the use of carbon steel resulting in a significant cost savings.

The following tables show the gas source conditions, process conditions and equipment sizes.

Stream composition

Process conditions

Equipment sizes