A new process synthesis methodology utilizing pressure exergy in subambient processes

Abstract

Abstract A graphical representation using the concept of Attainable Region is developed to represent all possible Composite Curves for a pressurized cold stream below ambient to include the cooling effect when the stream is expanded to its target pressure. The Attainable Region is an addition to the ExPAnD methodology, a new tool for Process Synthesis extending Pinch Analysis by explicitly accounting for pressure and including Exergy calculations. The methodology shows great potential for minimizing total shaft work in subambient processes.