Open AccessEnergy, exergy, and economic analysis of a new triple-cycle power generation configuration and selection of the optimal working fluid
Author(s) -
Mohammadreza Zeinodini,
M.A. Ehyaei
Publication year - 2019
Publication title -
mechanics and industry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.256
H-Index - 18
eISSN - 2257-7777
pISSN - 2257-7750
DOI - 10.1051/meca/2019021
Subject(s) - organic rankine cycle , exergy , boiler (water heating) , working fluid , condenser (optics) , rankine cycle , evaporator , combined cycle , electricity generation , process engineering , degree rankine , thermodynamics , environmental science , waste management , exergy efficiency , nuclear engineering , engineering , power (physics) , physics , gas compressor , light source , optics
The present study investigated energy, exergy and economic analyses on a new triple-cycle power generation configuration. In this configuration, the energy of the exhaust gas and the wasted energy in the condenser of the steam cycle is recovered in the heat recovery steam generator (HRSG) and the evaporator of organic Rankine cycle (ORC), respectively. A computer code was written in MATLAB to analyze the triple-cycle configuration. Validation through this program showed that the highest errors were 5.6 and 7.1%, which occurred in gas and steam cycles, respectively. The results revealed that the highest generated entropy was associated with the combustion chamber and the evaporator in the steam cycle. The first and second laws of thermodynamics efficiencies were improved by roughly 270 and 8%, respectively, through adding each of the steam and organic Rankine cycles. The entropy generated by the cycle increased by roughly 400 and 4% by adding the steam and organic Rankine cycles, respectively. The price of the produced electricity was also reduced by roughly 60 and 70%, respectively, for these two cycles.