Process description for the F3 example simulation

The process consists of the following:

• Three sources that contain Flare Gas (SRC1, SRC2, SRC3), which we define by molecular weight and Cp/Cv ratio, and three sources that contain a compositional fluid (SRC4, SRC5, SRC6) at different pressures and temperatures that propagate through a corresponding set of relief valves, a piping collection system, and a flare stack, which burns the gas.

• Inlet pipes that we size 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 that we size to have less than 10% superimposed back pressure (for conventional valves) so that high back pressure does not reduce relieving capacity.

• A fluid converter model that converts the compositional flare gas fluid to a molecular weight-based flare gas. The converter takes the molecular weight from a compositional source and the specific heat ratio calculated internally so that it can mix with a source that contains the Flare Gas fluid defined by those same properties.