Análise de modelos exergéticos em fornos rotativos industriais

Abstract

The industrial sector faces a challenge in relation to its energy demand. In view of this, it is pertinent to study how energy is used in industrial processes. From the First and Second Law of Thermodynamics it is possible to analyze these processes, using the energy and exergy balances. The exergetic analysis of a system stands out, since from it is possible to determine where energy losses occur in a process by irreversibilities, essential information to be possible to optimize the use of the available energy. However, different methodologies for the analysis of system exergy are found in the literature. In this study, a comparative analysis was performed between the different approaches for the exergetic analysis of rotary kilns used in industrial processes. This equipment demands high energy consumption. The review identified the variability between the modelings used to perform exergy analysis in rotary kilns. It was possible to observe that, in general, the exergetic efficiency of the kilns was inferior than the energetic. This allows to infer that exergetic analysis is actually a more powerful tool for the energetic study of a system.