Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
COMBINED CYCLE THERMO-ECONOMIC MODELING WITH INLET AIR COOLING
Submission Author:
Fábio Rodrigues Silva , SP , Brazil
Co-Authors:
Fábio Rodrigues Silva, José Antônio Perrella Balestieri
Presenter: Fábio Rodrigues Silva
doi://10.26678/ABCM.ENCIT2018.CIT18-0133
Abstract
Power gas cycles is benefited in terms of reduced compressor power consumption by the use of inlet air cooling techniques. An exergetic analysis is necessary to determine the best form of cooling, considering irreversibility through the second law of Thermodynamics, and combining it with a thermoeconomic analysis leads to exergetic costs. In the present research it will be carried out the exergetic and thermoeconomic modeling of a combined cycle with inlet air-cooling using evaporative cooling units and absorption refrigeration system. The research will involve different configurations, being the base case without cooling, one case with evaporative cooling system (EC) and another with absorption refrigeration system (ARS) with three thermal drives (exhaust gases, live steam and process steam). The fourth case will be the combination of the two types of cooling mentioned. The Engineering Equation Solver (EES) software will be used for the detailed thermodynamic and exergetic analyses of the cycle in its different configurations, and through the obtained results it will be possible to perform the thermoeconomic analysis, reaching the value of the costs involved in each process. The aim of this study is to compare the results obtained with a view to a better design orientation of these systems. Preliminary results based on the first law states an increase in overall efficiency of 3% for EC, an average of 7% for ARS and 6% for the RE and ARS combination.
Keywords
exergy, combined cycle, Inlet air cooling, Absroption refrigeration system, evaporative cooling
