Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
A COMPREHENSIVE THERMOECONOMIC DIAGRAM BASED ON BOTH SUBSYSTEM PRODUCTIVE PURPOSES AND PHYSICAL CONNECTIONS
Submission Author:
José Joaquim Conceição Soares Santos , ES
Co-Authors:
LEANDRO AVELLAR, Marcelo Aiolfi Barone, Dimas Jose Rua Orozco, Atilio Lourenço, José Joaquim Conceição Soares Santos
Presenter: José Joaquim Conceição Soares Santos
doi://10.26678/ABCM.ENCIT2018.CIT18-0489
Abstract
Some thermoeconomic methodologies use productive diagram to represent the productive purpose and the interconnection of the subsystems in order to assess the cost of the internal productive flows and final products, and they do not assess the costs of the physical flows, although the productive flows are defined in relation to the physical flows. Furthermore, the subsystems are connected using productive flows and fictitious components, without considering the physical interconnection presented in the flow sheet. On the other hand, other thermoeconomic methodologies use the physical diagram and assess the cost of the internal physical flows only. This paper proposes a comprehensive thermoeconomic diagram in which both physical and productive internal flows are represented, the subsystems are connected using the same physical flows presented in the flow sheet and allows the assessment of costs of both physical and productive flows. The proposed comprehensive diagram avoids the arbitrariness due to the interconnection of subsystems using productive flows and fictitious components that do not exist in the flow sheet of the plant. The comparison of the exergetic and monetary unit cost, obtained using physical, productive and comprehensive diagrams, in a combined cycle cogeneration plant, show that the unit costs of both physical and productive flows using comprehensive diagram can be the same as the ones using conventional physical and productive diagrams, respectively.
Keywords
thermoeconomics, internal flow cost, physical diagram, productive diagram, comprehensive diagram
