The mathematical formulations of two procedures for breaking down a large optimization energy problem into a hierarchy of separated but coupled subproblems were presented and discussed in the first part of this work (Ghiglino and Massardo, 1994). Here their applicability is illustrated by formulation of realistic analysis and design problems in the field of gas turbine systems, both for open and closed cycle plants. The definition of objective functions, design variables, constraints and subproblem analyses is discussed; the results obtained with the sensitivity, derivative procedure are compared with the results obtained with the linearization procedure.

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