Open AccessFirst and Second Law Analysis of Supercritical CO2 Recompression Brayton Cycle
Author(s) -
Muhammad Sajid Khan,
Uğur Atikol
Publication year - 2020
Publication title -
nust journal of engineering sciences
Language(s) - English
Resource type - Journals
eISSN - 2411-6319
pISSN - 2070-9900
DOI - 10.24949/njes.v13i1.342
Subject(s) - brayton cycle , exergy , exergy efficiency , gas compressor , turbine , thermodynamics , supercritical fluid , overall pressure ratio , isentropic process , environmental science , materials science , nuclear engineering , engineering , physics
The present research concentrates on the energy and exergy analysis of the S-CO2 recompression Brayton cycle and the individual components irreversibilities by varying the different operating parameters. Results show that the cycle efficiencies and LTR effectiveness reduce by increasing minimum cycle temperature, but HTR increases. The effect of minimum cycle temperature is more critical on cycle performance than maximum cycle temperature. The reactor has the highest irreversibility followed by recuperators and pre-cooler. Exergy efficiency shows a downward trend as environment temperature enhances. However, the effect of turbine inlet temperature is very low on-cycle efficiency and optimum pressure ratio for lower compressor outlet pressure values, which is more significant by increasing this parameter.