Flexible operation of combined cycle gas turbine power plants with supplementary firing

  • Inés Encabo Cáceres NTNU-Norwegian University of Science and Technology
  • Rubén Mocholí Montañés NTNU - Norwegian University of Science and Technology Department of Energy and Process Engineering
  • Lars Olof Nord NTNU-Norwegian University of Science and Technology


This article covers the use of supplementary firing in a gas-combined cycle power plant when high flexibility is requireddepending on the penetration of variable renewable energies and under different gas turbine loads. Process models weresimulated under different operating conditions with the software EBSILONrProfessional. Five main conditions were studiedfor the designed combined cycle: gas turbine part-load without supplementary firing, gas turbine full load with supplementaryfiring, the use of supplementary firing to overcome the effect of changing ambient conditions, part-load gas turbine performancewith supplementary firing technology and the use of supplementary firing in case of gas turbine shutdown.

Author Biography

Lars Olof Nord, NTNU-Norwegian University of Science and Technology
Associate Professor


[1] D. L. Chase, Combined-cycle development evolution and future, GE
Power Systems, GER-4206 (2001) 5–6.
[2] J. Backlund, J. Froemming, Thermal and economic analysis of supplementary
firing large combined cycle plants, Proc., Power Gen International.
[3] T. S. Kim, S. H. Hwang, Part load performance analysis of recuperated
gas turbines considering engine configuration and operation strategy,
Energy 31 (2-3) (2006) 260–277.
[4] T. Kim, Comparative analysis on the part load performance of combined
cycle plants considering design performance and power control
strategy, Energy 29 (1) (2004) 71–85.
[5] P. Dechamps, N. Pirard, P. Mathieu, Part-load operation of combined
cycle plants with and without supplementary firing, Journal of engineering
for gas turbines and power 117 (3) (1995) 475–483.
[6] B. F. Möller, M. Genrup, M. Assadi, On the off-design of a natural gasfired
combined cycle with co2 capture, Energy 32 (4) (2007) 353–359.
[7] A. G. Díaza, E. Sancheza, J. G. Santalób, J. Gibbinsa, M. Lucquiauda,
On the integration of sequential supplementary firing in natural gas
combined cycle for co2-enhanced oil recovery: A techno-economic
analysis for mexico, Energy Procedia 63 (2014) 7558–7567.
[8] H. Li, M. Ditaranto, J. Yan, Carbon capture with low energy penalty:
supplementary fired natural gas combined cycles, Applied energy 97
(2012) 164–169.
[9] N. V. Gnanapragasam, B. V. Reddy, M. A. Rosen, Optimum conditions
for a natural gas combined cycle power generation system based on
available oxygen when using biomass as supplementary fuel, Energy
34 (6) (2009) 816–826.
[10] A. Bhattacharya, D. Manna, B. Paul, A. Datta, Biomass integrated gasification
combined cycle power generation with supplementary biomass
firing: Energy and exergy based performance analysis, Energy 36 (5)
(2011) 2599–2610.
[11] E. Conte, C. Pedretti, Thermo-economic optimization of the ccpp design
with supplementary firing considering off-design performance and
operating profile, in: ASME 2011 Turbo Expo: Turbine Technical Conference
and Exposition, American Society of Mechanical Engineers,
2011, pp. 621–631.
[12] R. Kehlhofer, F. Hannemann, B. Rukes, F. Stirnimann, Combined-cycle
gas & steam turbine power plants, Pennwell Books, 2009.
[13] D. Energy & Transport, Training guide on Combined Heat & Power
Systems. 2001.
[14] J. C. Backlund, S. C. Bergmans, Value-added applications of supplementary
firing in gas turbine based cogeneration plants, in: Proc.,
ABMA Industrial Boiler Systems Conference, 1997.
[15] Steag Energy Services, EbsilonProfessional - Plant engineering and
design., (2015).
[16] O. Bolland, Thermal power generation, Compendium, Department og
Energy and Process Engineering-NTNU.
[17] H.I.H. Saravanamutto, G.F.C. Rogers, H. Cohen, P.V. Straznicky, Gas
Turbine Theory, 6th ed., Pearson Education Limited, 2009.
[18] VTU Energy, Gas Turbine Library for Ebsilon Professional, in, 2015.
[19] E.R. Følgesvold, Combined Heat and Power Plant on Offshore Oil and
Gas Installation, Master’s thesis at the Department of Energy and Process
Engineering, Norwegian University of Science and Technology,
[20] M. Boyce, Handbook for cogeneration and combined cycle power
plants, asme international (2010).
How to Cite
ENCABO CÁCERES, Inés; MONTAÑÉS, Rubén Mocholí; NORD, Lars Olof. Flexible operation of combined cycle gas turbine power plants with supplementary firing. Journal of Power Technologies, [S.l.], v. 98, n. 2, p. 188–197, july 2018. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/1056>. Date accessed: 27 feb. 2024.
Power Plant


: CCGT; duct firing; off-design performance; process simulation; flexibility

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