Ferenc Friedler University of Pannonia, Veszpr é m, Hungary September 17-18, 2012 Duna Palota , Budape st. Local Structures for Global Security. Outline. Introduction Recent disasters and potential risks Definitions General goals Sources of risks Security and PSE Contributions
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University of Pannonia, Veszprém, Hungary
September 17-18, 2012
Even a cultural activity can generate global disaster.
operations primarily because of design, maintenance, and operations problems.
Systematic vs. intuitive solution
Comp. Chem. Eng., 1995
* Other school’s work
Comp. Chem. Eng., 2000
** Our work (optimality guaranteed)
“The selection of the structure can typically reduce energy consumption by 50% and net-present cost by 35%” (Siirola, 1996)
Importance of the mathematical model
Kovacs, Z., F. Friedler, and L. T. Fan, Recycling in a Separation Process Structure, AIChE J., 39, 1087-1089 (1993)
For PNS problem (P,R,O) a P-graph (m,o) satisfying the following five axioms is a combinatorially feasible network.
(S2)xm, d-(x)=0 iff xR
(S4)y0o path [y0, yn] where ynP
(S5) xm, (,)o such that x()
Reduction of the search space
The five axioms reduce the
34 billion combinations of the operating units to
3,465 combinatorially feasible structures
for the industrial process synthesis problem of 35 op. units.
The optimal solution is included in the set of 3465 feasible structures.