Mechanical Engineering; Energy Engineering and Power Technology; Aerospace Engineering; Fuel Technology; Nuclear Energy and Engineering
Abstract :
[en] Abstract
The growing share of renewable energies in our electricity production, together with the still lacking storage capacity, strongly reinforces the need for more flexible electricity production units. In this context, combined cycle gas turbines (CCGTs) have a role to play, both in the current and future electricity production system due to their high efficiency, high load flexibility, and low CO2 emissions compared to other conventional thermal power plants. Nevertheless, bearing in mind our current challenges concerning climate change, the CO2 emissions of these CCGTs need to be reduced drastically. The amine-based absorption carbon capture (CC) process is currently the most mature and applicable CC technology. This process is known to require a considerable amount of thermal energy, degrading plant performance. However, to back-up renewable production, CCGTs will operate most of the time under part-load conditions. The impact of these part-load operations on the CC is still relatively unknown. Within this framework, this study aims to assess the performance of the CC process applied to a typical CCGT under part-load operation using specific simulation models. The CC plant model has been successfully validated against experimental data from a pilot-scale capture facility. Then, the CC plant has been scaled-up to the CCGT scale and the process has been optimized for each operating condition. The simulation results show that the specific reboiler duty increases for part-load operation, while the specific cooling requirements decrease. Moreover, the analysis of the yearly CCGT operation highlights a relative increase in CC energy penalty of 21% for an annual CCGT load factor of 0.5, impacting significantly plant performance. The next step will involve reducing this energy penalty.
Disciplines :
Energy
Author, co-author :
Verhaeghe, Antoine ; Université de Mons - UMONS > Faculté Polytechnique > Service de Thermique et Combustion
Dubois, Lionel ; Université de Mons - UMONS > Faculté Polytechnique > Service de Génie des Procédés chimiques et biochimiques
Bricteux, Laurent ; Université de Mons - UMONS > Faculté Polytechnique > Service des Fluides-Machines
Thomas, Diane ; Université de Mons - UMONS > Faculté Polytechnique > Service de Génie des Procédés chimiques et biochimiques
Blondeau, Julien; Thermo and Fluid Dynamics (FLOW), Brussels Institute for Thermal-Fluid Systems and Clean Energy (BRITE), Vrije Universiteit Brussel (VUB), Université Libre de Bruxelles (ULB) , Pleinlaan, 2, Brussel 1050, Belgium
De paepe, Ward ; Université de Mons - UMONS > Faculté Polytechnique > Service de Thermique et Combustion
Language :
English
Title :
Carbon Capture Performance Assessment Applied to Combined Cycle Gas Turbine Under Part-Load Operation
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