The geometry of separation processes: A horse-carrot theorem for steady flow systems
Department of Mathematical and Computer Sciences, San Diego State
University San Diego, CA 92182-7720, USA
2 Mathematics Department, San Diego City College - San Diego, CA 92101, USA
Accepted: 15 April 1998
The horse-carrot theorem bounding the entropy production in processes with a fixed number of relaxations is extended to steady flow processes. The dissipation turns out to be related to a path of flows rather than states. The example of fractional distillation is presented and shows how null directions for the geometry turn out to be useful in the analysis. The implied distillation column design offers potentially significant energy savings.
PACS: 82.60.Lf – Thermodynamics of solutions / 05.70.Ln – Nonequilibrium thermodynamics, irreversible processes / 02.40.Ma – Global differential geometry
© EDP Sciences, 1998