Thermodynamic analysis of irreversible closed Brayton engine cycles used in trigeneration systems

The paper presents a comparative thermodynamic analysis of irreversible closed Brayton engine cycles for two working fluids and for four imposed thermodynamic parameters. The chosen fluids are the air and the carbon dioxide. The four imposed thermodynamic constraints are the specific entropy variati...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-09, Vol.595 (1), p.12022
Main Authors: Dumitrașcu, G, Feidt, M, Namat, A R J, Grigorean, Ş, Horbaniuc, B
Format: Article
Language:English
Subjects:
Carbon dioxide
Compression ratio
Energy transfer
Engineering Sciences
Gas turbines
Heating
Parameters
Pressure drop
Working fluids
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Summary:The paper presents a comparative thermodynamic analysis of irreversible closed Brayton engine cycles for two working fluids and for four imposed thermodynamic parameters. The chosen fluids are the air and the carbon dioxide. The four imposed thermodynamic constraints are the specific entropy variation during the heating process, the specific input heat, the specific output power and the energy efficiency. The irreversibility is quantified by the isentropic efficiencies of compressor and of gas turbine, and by the pressure drops coefficient during the heating and cooling processes of the working fluid. Each imposed thermodynamic parameter allowed to evaluate all corresponding cycle parameters, i.e. temperatures and pressures, and operational parameters, i.e. energy transfer values, function of pressure compression ratio and irreversibility magnitude. The thermodynamic analysis compares the selected results for the two working fluids.
ISSN:1757-8981
1757-899X
1757-899X
DOI:10.1088/1757-899X/595/1/012022