Thermodynamic Approach for Optimal Design of Heat and Power Plant. Relatioship between thermodynamic and economic solutions

SERGIO MUSSATI; AGUIRRE, A. P.; SCENNA, NICOLAS JOSE

Rio de Janeiro

Congreso; 2nd Mercosur Congress on Chemical Engineering. 4th Mercosur Congress on Process Systems Engineering; 2005

UFRJ

In this paper, a new procedure for the design and analysis of Heat and Power Plants is presented. In this formulation, thermodynamic solutions obtained from an optimization problem which involves a  thermodynamic objective function (efficiency of the plant) are used to find the economic design of the plant. In fact, by applying the Karush-Kuhn-Tucker conditions it is possible to relate thermodynamic and economic solutions. A formal context for the use of thermodynamic models in solving complex optimization problems that arise in the area of synthesis and design of chemical processes is introduced. The proposed methodology has been applied for two different configuration systems. Rigorous models for the equipments have been used to model the entire plants. The obtained results are presented in order to illustrate the procedure.