Process description for the F4 example simulation

The process consists of the following:

• Four sources of a multiphase flare fluid at different pressures that propagate through a set of four relief valves, a piping collection system, a knockout drum that separates the vapor and liquid, and a flare stack, which burns the gas.

• Inlet pipes are sized such that the pressure drop is less than 3% of the specified pressure in the respective relief valves to prevent relief valve chatter.

• Tail pipes and downstream flare header piping are sized to have less than 10% superimposed back pressure (for conventional valves) so that high back pressure does not reduce relieving capacity.

• A knockout drum that we connect to a level controller to regulate the flow through the drum. We also use the level controller to conduct independent dynamic studies as necessary.