The objective is to propose a tool for the computer aided design of Plate Fin Heat Exchangers (PFHE). The problem of PFHE design is stated as an optimisation problem. Then it is solved using either Successive Quadratic Programming algorithm (relaxed NLP problem) or Simulated Annealing method (initial MINLP problem). Advantages and drawbacks of both methods are discussed. An industrial example is presented. Compared with the classical design method, mathematical programming techniques allow up to 20% capital cost reduction.
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