Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
COMPARATIVE TERMOECONOMIC RESULTS ANALYZING A BRAYTON – REGRIGERATION CYCLE
Submission Author:
Fernanda Machado , MG , Brazil
Co-Authors:
Fernanda Machado, Felipe Raul Ponce Arrieta
Presenter: Fernanda Machado
doi://10.26678/ABCM.ENCIT2022.CIT22-0032
Abstract
This work aims at the thermoeconomic analysis of the cogeneration system that uses a Brayton cycle turbine and R134a gas vapor compression refrigeration system to produce 3 MW of electricity and 10 TR, using natural gas as fuel. The objective of the analysis is to obtain the unit exergetic costs of the cogeneration system, from the application of different thermoeconomic models: SPECO, E, E&S, H&S, UFS and UFS+. To achieve this purpose, system simulation and evaluation of thermoeconomic models were developed using the Engineering Equation Solver (EES) software to simulate the unit exergetic costs (k*) of cogeneration. The results indicated that the unit exergetic costs of the products of the cogeneration cycle electrical power and evaporator heat were equal to 2.75 kW/kW and 5.34 kW/kW, in the analyzes carried out from the all the models under study. It was observed that the higher the level of exergy disaggregation by a model proposed, the higher the level of complexity presented.
Keywords
thermoeconomics, Exergetic cost, exergy, cogeneration, Applied Thermodynamics
