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A novel triple power cycle featuring a gas turbine cycle with supercritical carbon dioxide and organic Rankine cycles: Thermoeconomic analysis and optimization.

A novel triple power cycle featuring a gas turbine cycle with supercritical carbon dioxide and organic Rankine cycles: Thermoeconomic analysis and optimization.

Authors :
Mohammadi, Kasra
Ellingwood, Kevin
Powell, Kody
Source :
Energy Conversion & Management. Sep2020, Vol. 220, pN.PAG-N.PAG. 1p.
Publication Year :
2020

Abstract

• A novel triple power cycle is proposed and evaluated using thermoeconomic analysis. • A gas turbine cycle is combined with an s-CO 2 recompression cycle and ORC. • The triple cycle is optimized using a particle swarm optimization algorithm. • The optimum efficiency and LCOE are 0.521 and $52.819/MWh, respectively. • The proposed cycle has superiority over a very efficient cycle from the literature. In this study, a novel triple power cycle is proposed where waste heat from a gas turbine cycle is utilized to drive a supercritical carbon dioxide (s-CO 2) recompression cycle and a recuperative organic Rankine cycle (ORC) in sequence. A detailed thermoeconomic model is developed and implemented in MATLAB to evaluate the performance of the proposed cycle under different operating conditions. Optimization using a particle swarm optimization (PSO) algorithm is performed to minimize the levelized cost of electricity (LCOE) and determine the optimum design conditions of the cycle. The optimization results show that for a 100 MW cycle, the overall thermal efficiency and LCOE are 0.521 and $52.819/MWh, respectively. The turbine inlet temperature of the gas turbine and s-CO 2 cycles are found as the most influential parameters on the thermoeconomic performance of the triple cycle. The proposed triple cycle shows an excellent waste energy recovery potential and superiority over a very thermodynamically efficient cycle from the literature, which included a gas turbine topping cycle and a complex cascade s-CO 2 power cycle used a bottoming cycle. The proposed triple cycle shows up to 0.9% points higher efficiency while it has fewer heat exchangers and turbomachinery than the cycle from the literature. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01968904
Volume :
220
Database :
Academic Search Index
Journal :
Energy Conversion & Management
Publication Type :
Academic Journal
Accession number :
145211449
Full Text :
https://doi.org/10.1016/j.enconman.2020.113123