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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
ORGANIC RANKINE CYCLES OPTIMIZATION FOR ELECTRICITY COGENERATION IN A CEMENT INDUSTRY
Submission Author:
Felipe Raul Ponce Arrieta , MG
Co-Authors:
Luiz Fernando Moreira, Felipe Raul Ponce Arrieta
Presenter: Felipe Raul Ponce Arrieta
doi://10.26678/ABCM.ENCIT2020.CIT20-0445
Abstract
To show the results of optimization of the electricity cogeneration with organic Rankine cycles (ORCs) in cement industry with 3.500 ton of clink daily capacity in the Brazilian energy scenario is the main purpose of this work. The thermodynamic and economic optimization’s results for four ORC configurations are presented for three organic fluid. The results were obtained using the mass, energy, entropy, exergy, and cost modelling coupled with genetic algorithm. The modelling was solve using Engineering Equation Solver (EES) software. From the thermodynamic point of view is possible to state that the R141b fluid proved to be more attractive for applications in ORC without superheating with net power generation ranging from 4,565 kW to 5,541 kW, with exergetic efficiency between 41.75% and 49.70%. In ORC with superheating, the R11 fluid was more attractive with net power generation ranging from 5,043 kW to 5,614 kW, and exergetic efficiency between 46.15% and 50.59%. From the economic point of view, the R123 fluid was more attractive with the lowest values of specific investment cost (3,516 R$/kW) and electricity generation (0.1065 R$/kWh) simple subcritical ORC with superheating. From the aforementioned results it can be affirmed that, among the studied fluids, R141b becomes the most attractive for cogeneration in the cement industry because it presents the best thermodynamic performance without losing much economic competitiveness when compared to the economic results shown by R123 and R11.
Keywords
Organic Rankine Cycle, Cogeneration system, Cement industry, genetic algorithm
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