Name: LEANDRO MUNHOZ DE AVELLAR
Type: MSc dissertation
Publication date: 30/11/2018
Advisor:
Name |
Role |
|---|---|
| JOSÉ JOAQUIM CONCEIÇÃO SOARES SANTOS | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| JOSÉ JOAQUIM CONCEIÇÃO SOARES SANTOS | Advisor * |
Summary: Some thermoeconomic methodologies use the production diagram to represent how the product of a given subsystem is distributed to be used as input in another subsystem or as a product of the plant. However, these methodologies do not evaluate physical flows, only roductive flows, although the productive flows are defined in relation to the physical flows. In addition, the subsystems are connected using productive flows and imaginary units, without considering actual physical flowsheet interconnection of the plant. On the other hand, other thermoeconomic methodologies use the physical diagram and evaluate only the internal cost of the physical flows of the components, and do not make use of fictitious subsystems. This dissertation proposes the use of a comprehensive diagram, in which the physical and productive internal flows are represented, WHERE subsystems are connected using the same physical flows presented in the flow sheet of the plant, still evaluating their cost and also of the productive flows. The comprehensive diagram presented avoids arbitrariness due to the interconnection of productive flows not being made by fictitious subsystems. In addition, this work makes use of different thermoeconomic methodologies in the most varied types of thermal systems showing how waste treatments and dissipative equipments are given. Thus showing the input and output definitions of the subsites, construction of the diagrams, applying the equations and comparing the results of exergético and monetary costs for conventional and comprehensive modeling. For the residues in the comprehensive modeling using total exergy, the treatment was similar to the one performed in the physical diagram, in the dissipative equipments showed that the models capable of defining product and input (H&S and UFS) were also applied in the comprehensive diagram obtaining the flows productive and physical. As for the arbitrariness of the interconnections it has been shown that it does not exist due to use the actual flowsheet connections. It is concluded that the comprehensive modeling is able to treat the most varied types of thermal systems, and still obtain information of productive and physical flows of the plant.
Key words: thermoeconomics, cost, physical diagram, productive diagram, comprehensive
diagram.
