Facultad Regional Rosario

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Author: search.filters.author.Benz, Sonia JudithSubject: search.filters.subject.NGCC power plant

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    Optimal economic strategy for the multiperiod design and long-term operation of natural gas combined cycle power plants.
    (Elsevier, 2012-08-25) Godoy, Ezequiel; Scenna, Nicolás José; Benz, Sonia Judith
    Optimal power plant designs are achieved by means of a proposed multiperiod non-linear programming formulation that utilizes the net present value as objective function, while construction, operation and dismantling of the generation facility are accounted for. In addition, optimal operative characteristics are also established for each operative time period, in a way that the system constraints are always satisfied. Based on the life cycle oriented economic optimal characteristics, a reduced model is proposed as strategy for simplifying the resolution of the rigorous multiperiod model. Trends in the system behavior are identified, enabling the reduction of the multiperiod formulation into a system of non-linear equations plus additional constraints, which allows easily computing accurate estimations of the optimal values of the design variables as well as the time-dependent operative variables.
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    An optimization model for evaluating the economic impact of availability and maintenance notions during the synthesis and design of a power plant
    (Elsevier, 2017-01-27) Godoy, Ezequiel; Benz, Sonia Judith; Scenna, Nicolás José
    In this paper, we introduce an optimization strategy in order to comprehensively quantify the impact of availability and maintenance notions during the early stages of synthesis and design of a new natural gas combined cycle power plant. A detailed state-space approach is thoroughly discussed, where influence of maintenance funds on each component’s repair rate is directly assessed. In this context, analysis of the reliability characteristics of the system is centered at two designer-adopted parameters, which largely influence the obtained results: the number of components which may fail independently at the same time, and the number of simultaneous failure/repair events. Then, optimal solutions are evaluated as the availability-related parameters and the amount of resources assigned for maintenance actions are varied across a wide range of feasible values, which enable obtaining more accurate and detailed estimations of the expected economic performance for the project when compared with traditional economic evaluation approaches.