Process description for the AA2 example simulation

The process includes the following major flow paths:

• A gaseous hydrogen feed stream that we liquefy by using three plate-fin heat exchangers.

  The following table shows the specifications of the feed stream.

  Table 1: Feed stream properties

  Variable	Description	Value	UOM
  z[OH2]	Molar orthohydrogen composition	75	%
  z[PH2]	Molar parahydrogen composition	25	%
  F	Total molar flowrate	0.5	kmol/h
  		1.10	lbmol/h
  T	Temperature	298.15	K
  		77	°F
  P	Pressure	120	kPa
  		1.18	atm

• A closed refrigeration loop.

• A liquid nitrogen feed to provide additional cooling capacity to exchanger E1.