Journal
APPLIED ENERGY
Volume 84, Issue 7-8, Pages 749-762Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2007.01.006
Keywords
thermoeconomic optimization; Pareto domain; fuzzy sets; cogeneration; refrigerant selection
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We have developed a new approach for thermoeconomic analysis of energy-transforming systems based on the sequential uncertainty account to make decisions that simultaneously meet thermodynamic and economic goals. Thermoeconomic optimization has been considered as a fuzzy non-linear programming problem in which local criteria: maximum energy (exergy) efficiency and minimum total cost rate as well as different constraints in an ill-structured situation can be represented by fuzzy sets. The trade-off or the Pareto domain, where the value of a thermodynamic criterion cannot be improved without the value of economic criterion being worsened, has been considered as a first step of optimization strategy. The Bellman-Zadeh model, as the intersection of all fuzzy criteria and constraints, has been used for a final decision-making. Case studies of fuzzy thermoeconomic analysis application have been presented. (c) 2007 Elsevier Ltd. All rights reserved.
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