Thermoexergetic analysis and response optimisation of selective exhaust gas recirculation with solvent-based CO<inf>2</inf> capture in a natural gas-fired combined cycle power plant

Tang, Y; Chong, CT; Ng, JH; Herraiz, L; Li, J; Ong, HC; Lam, SS; Tabatabaei, M; Chong, WWF

Thermoexergetic analysis and response optimisation of selective exhaust gas recirculation with solvent-based CO<inf>2</inf> capture in a natural gas-fired combined cycle power plant

Tang, Y Chong, CT Ng, JH Herraiz, L Li, J Ong, HC Lam, SS Tabatabaei, M Chong, WWF

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Publisher:: Springer
Publication Type:: Journal Article
Citation:: Clean Technologies and Environmental Policy, 2024, 26, (5), pp. 1643-1667
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Tang, Y
dc.contributor.author	Chong, CT
dc.contributor.author	Ng, JH
dc.contributor.author	Herraiz, L
dc.contributor.author	Li, J
dc.contributor.author	Ong, HC
dc.contributor.author	Lam, SS
dc.contributor.author	Tabatabaei, M
dc.contributor.author	Chong, WWF
dc.date.accessioned	2025-01-06T23:27:45Z
dc.date.available	2025-01-06T23:27:45Z
dc.date.issued	2024-01-01
dc.identifier.citation	Clean Technologies and Environmental Policy, 2024, 26, (5), pp. 1643-1667
dc.identifier.issn	1618-954X
dc.identifier.issn	1618-9558
dc.identifier.uri	http://hdl.handle.net/10453/183045
dc.description.abstract	The present study investigates the impact of integrating selective exhaust gas recirculation (SEGR) with a combined cycle gas turbine system (CCGT) and post-combustion capture (PCC) in a model power plant. The impacts of ambient temperature, turbine inlet temperature (TIT), and pressure ratio (PR) on the overall thermal and exergetic efficiencies at component and system levels are evaluated. Results show that the combustion chamber and absorber are the two components with the largest exergy destructions in CCGT and PCC units, with a fraction of 44.8% and 52.9%, respectively. After integrating with SEGR, CO2 concentration in flue gas rises from 3.61 to 6.08%, whereas PCC exergetic efficiency increases by 6%. A design of experiments statistical model was applied through a full factorial design to optimise the responses of minimising total exergy destruction while maximising both the thermal and exergetic efficiencies. The optimised input set for TIT of 1300 °C, PR of 15, and SEGR recycle ratio of 25% leads to the best outcome of 415.08 MW, 56.53%, and 51.04% for total exergy destruction, thermal efficiency, and exergetic efficiency, respectively. The predictor equations produced have high degrees of correlation and predictive capabilities and could be used to form empirical equations to replace thermodynamic calculations entirely. Graphical Abstract: [Figure not available: see fulltext.].
dc.language	English
dc.publisher	Springer
dc.relation.ispartof	Clean Technologies and Environmental Policy
dc.relation.isbasedon	10.1007/s10098-023-02633-w
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	05 Environmental Sciences, 06 Biological Sciences, 09 Engineering
dc.subject.classification	Environmental Sciences
dc.subject.classification	31 Biological sciences
dc.subject.classification	40 Engineering
dc.subject.classification	41 Environmental sciences
dc.title	Thermoexergetic analysis and response optimisation of selective exhaust gas recirculation with solvent-based CO<inf>2</inf> capture in a natural gas-fired combined cycle power plant
dc.type	Journal Article
utslib.citation.volume	26
utslib.for	05 Environmental Sciences
utslib.for	06 Biological Sciences
utslib.for	09 Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2025-01-06T23:27:44Z
pubs.issue	5
pubs.publication-status	Published
pubs.volume	26
utslib.citation.issue	5

Abstract:

The present study investigates the impact of integrating selective exhaust gas recirculation (SEGR) with a combined cycle gas turbine system (CCGT) and post-combustion capture (PCC) in a model power plant. The impacts of ambient temperature, turbine inlet temperature (TIT), and pressure ratio (PR) on the overall thermal and exergetic efficiencies at component and system levels are evaluated. Results show that the combustion chamber and absorber are the two components with the largest exergy destructions in CCGT and PCC units, with a fraction of 44.8% and 52.9%, respectively. After integrating with SEGR, CO2 concentration in flue gas rises from 3.61 to 6.08%, whereas PCC exergetic efficiency increases by 6%. A design of experiments statistical model was applied through a full factorial design to optimise the responses of minimising total exergy destruction while maximising both the thermal and exergetic efficiencies. The optimised input set for TIT of 1300 °C, PR of 15, and SEGR recycle ratio of 25% leads to the best outcome of 415.08 MW, 56.53%, and 51.04% for total exergy destruction, thermal efficiency, and exergetic efficiency, respectively. The predictor equations produced have high degrees of correlation and predictive capabilities and could be used to form empirical equations to replace thermodynamic calculations entirely. Graphical Abstract: [Figure not available: see fulltext.].

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http://hdl.handle.net/10453/183045