Uma avaliação da melhoria na precisão do diagnóstico termoeconômico por meio da desagregação da exergia e do isolamento de equipamentos dissipativos

Abstract

In this work, different thermoeconomic methodologies (E, E&S, H&S, UFS and UFS) are applied in the thermoeconomic diagnosis of different thermal systems by the fuel impact formula focusing on evaluating the accuracy and quality improvement of the results through the dissipative equipment isolation in the productive structure and physical exergy disaggregation. The analysed systems are chosen according to its dissipative equipment: a vapour power system (condenser), a heat pump (valve) and a refrigeration system (condenser and valve). The E and E&S models showed to be inadequate in all scenarios as they do not allow complete equipment isolation in the productive structure, where the latter also presents thermodynamic inconsistencies. The UFS and H&S models are considered a good option to evaluate vapour power systems quantifying the faults in all components. The UFS and UFS+ models are the only ones who allowed total equipment isolation for the heat pump and the refrigeration system. Nonetheless, the influence of the productive diagram fictitious unities does not allow an exact analysis of the anomalies impact for the last two systems.