One set of nodes (horizontal bars) represents the operating units and the other (solid circles) the material streams. There is no arc between two operating units. Relations of the operating units are realized through material streams, i.e., an operating unit is connected to another if one of them consumes a material produced by the other. In P-Graph representation there are arcs from each input material (stream) to the operating unit consuming it and from each operating unit to its output materials (streams).

How to construct a P-Graph representing a flowsheet + PNS STUDIO

Conventional_graph_flow

Conventional Representation of a process structure.

P-Graph is a bipartite graph. One set of nodes (horizontal bars) represents the operating units and the other (solid circles) the material streams. There is no arc between two operating units. Relations of the operating units are realized through material streams, i.e., an operating unit is connected to another if one of them consumes a material produced by the other. In P-Graph representation there are arcs from each input material (stream) to the operating unit consuming it and from each operating unit to its output materials (streams).

P_graph_flow

P-Graph represenation of the process structure.