Análise Exergoeconômica de um sistema de trigeração de energia operando com um Ciclo Rankine Orgânico

Thiago de Souza Figueredo

Universidade Federal da Paraíba Brasil

João Luiz de Medeiros Neto

Adriano da Silva Marques

Carlos Antônio Cabral dos Santos

Resumo

This work presents the results of the energetic, exergetic and exergoeconomic evaluation of a trigeneration system which is composed of an Organic Rankine Cycle (ORC), a simple effect Absorption Refrigeration System (SRA) and a boiler. The proposed system is driven by the residual heat of an industrial process. A computational code was developed on the EES (Engineering Equation Solver) platform to solve the thermodynamic and exergoeconomic equation of each equipment. The SPECO method (Specific Exergy Costing) was used for the exergoeconomic evaluation. Results indicated which equipment needs optimization in order of priority. The results show that the greatest destruction of exergy occurs in the ORC steam generator (56% of the total), followed by the condenser that presented an exergy destruction of 33%. Conversely, the pump and expander performed better, with low exergy destruction values. The results of the exergoeconomic evaluation also indicate that the steam generator and condenser from ORC need to be optimized before any other equipment, as they obtained the lowest values of the exergoeconomic factor (fk) and the highest values of the specific relative cost (rk).

Palavras-chave


Exergoeconomia; SPECO; ORC; Expansor parafuso duplo; Absorção; Exergia.


Texto completo:

DOI: http://dx.doi.org/10.18265/1517-0306a2021v1n54p20-31

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