.ThermalSeparation.Components.Columns.StructuredPackedColumn_newStartUpShutDown.Holdup .ThermalSeparation.Components.Columns.StructuredPackedColumn_newStartUpShutDown.Holdupcalculation of holdup inside the column
model Holdup = ThermalSeparation.Holdup.StructuredPackedColumn.StichlmairStat;