Misc Sankey Diagrams Uncommented 12

Another Friday afternoon post, before I head off for the weekend: This is from a German research project ‘SFB/Transregio 96’. Three universities seem to make up this research group (Aachen, Dresden, Chemnitz) that studies thermo-energetic optimization for machining tools

These are schematic Sankey diagrams for two states (ON/OFF) of a heat exchanger.