Optimization of a liquefaction plant using genetic algorithms

This paper presents an optimization methodology for liquefaction/refrigerat ion systems in the cryogenic field. The Figure of Merit has been chosen as the evaluation index, and genetic algorithms as evaluation criteria. This m ethodology has been applied to an existing helium liquefaction system that works according to a Collins cycle. The results show the possibility of adj usting some of the thermal-pressure variables for the system in order to im prove the Figure of Merit. (C) 2000 Elsevier Science Ltd. All rights reserv ed.