FRRo - I+D+i - Publicaciones en Congresos, Conferencias y Jornadas
Permanent URI for this collectionhttp://48.217.138.120/handle/20.500.12272/1298
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Item Economic implications when considering availability in the optimal design and operation of a NGCC power plant.(2012-09) Godoy, Ezequiel; Benz, Sonia Judith; Scenna, Nicolás José- Traditionally, power plants are designed to fulfll a pre-specified external demand, usually by oversizing the existing equipment, which implies excessive capital costs and might even result in designs that cannot satisfy demands for certain situations. Therefore, in order to avoid large economic penalties if power demand is not satisfied, the design and operation of such systems need to consider the effect of reliability considerations and maintenance funds allocation on the system design and operative characteristics. In the present work, a MINLP formulation is developed to address the design and operation of power plants while considering the implications of a statespace availability modeling approach and of a comprehensive maintenance funds allocation policy. Then, the decision variables are optimized simultaneously throughout several maintenance and failure situations that configure difeerent scenarios, in order to ensure that the plant will be able to cope with them while meeting the expected requirements at minimum cost.Item Implications of a state-space approach for the economic optimal design of a NGCC power plan.(2014-10) Godoy, Ezequiel; Benz, Sonia Judith; Scenna, Nicolás JoséA detailed state-space approach is here embedded in the optimization model for the economic design of a new natural gas combined cycle (NGCC) power plant. This proposal comprehensively quantifies the impact of different adopted values for two critical parameters: the number of simultaneously and independently failed components, and the number of simultaneous events. The former depicts the maximum number of components (gas turbines, steam turbine, HRSGs, auxiliary services, etc.) that seem feasible to fail because of independent causes at the same time. The latter describes the maximum number of transitions between operating conditions, which is directly linked to the amount of available maintenance resources (personnel, parts, etc). Implications of a wide array of values for these two parameters over the economic optimal solutions are thoroughly discussed, where it is observed that more accurate and detailed estimations of the expected economic performance for the project are attained.Item Strategy for optimization of CCGT power plants by solving a simple nonlinear equations system and constraint equations.(2010-07) Godoy, Ezequiel; Benz, Sonia Judith; Scenna, Nicolás JoséA strategy for the solution of the optimization problem of minimum cost of combined cycle gas turbine power plants is presented. Specific relationships, valid at the optimal solution, among selected decision variables are used to introduce new constraints to the optimization problem. Then, the feasible region is reduced to a “single point”, and the resolution strategy becomes equivalent to solving the resultant set of non-linear equations system and constraint equations so achieved to optimize the system. This approach can also be used to achieve reduced models for real time optimization problems.Item Life cycle oriented design of a GT + 1PSH HRSG type CCGT power plant .(2009-12) Godoy, Ezequiel; Scenna, Nicolás José; Benz, Sonia JudithIn the present work, a life cycle oriented approach is used for designing power plants in a way they can satisfy the desired demand along the whole time horizon, while selected economic indicators of the project are optimized. As case study, optimal design characteristics as well as optimal values of long term operation parameters of a GT + 1PSH HRSG Type CCGT power plant (GT: gas turbine, 1PSH: 1 pressure with superheater, HSRG: heat recovery steam generator, CCGT: combined cycle gas turbine) are obtained by means of a multiperiod mathematical model, seeing that the net present value of the facility is maximized. In addition, advantages of the life cycle oriented approach are discussed when compared with a power plant design obtained by traditional methods.Item Actas del Congreso de Ingeniería de Procesos y Productos 2016(Universidad Tecnológica Nacional. Facultad Regional Rosario. Secretaría de Ciencia y Tecnología, 2016-03-30) Benz, Sonia JudithActas del Congreso de Ingeniería de Procesos y Productos 2016, realizadas en la Facultad Regional Rosario de la UTN, los días 30 y 31 de marzo y 1 de abril de 2016