Operation of a gas turbine air bottoming cycle at part load

  • Daniel Czaja Instytut Maszyn i Urządzeń Energetycznych Politechnika Śląska
  • Tadeusz Chmielniak
  • Sebastian Lepszy


The purpose of this study is to analyze the performance characteristics of a gas turbine air bottoming cycle operating at part load conditions. The most effective option in terms of the energy efficiency of each installation is operating with a nominal load. Various applications have other needs. For example marine gas turbines should characterized by high value of efficiency in a wide range of load. There are many other examples of installation which spend most of time at power levels significantly lower than maximum.This paper presents two-shaft gas turbine air bottoming cycle. The gas turbine is coupled to the air part by means of an air heat exchanger. This configuration allows the gas turbine operating at nominal load while the cycle power output is regulated by air turbine part load. However, due to the fact that the mechanical power output ratio of the air turbine and the gas turbine is about 0.17-0.20 it is necessary to consider a variant where the gas turbine also operates at part load. Chosen results are summarized and compared with a standalone gas turbine unit.


[1] S. Michalski, Thermodynamic and economic analysis of hard coal fired supercritical power plant with ionic membrane for air separation, Rynek Energii 105 (2) (2013) 54–
[2] W. Farrell, Air cycle thermodynamic conversion system (1988).
[3] E. Alderson,W. Farrell, Air bottoming cycle for coal gasification plant (1988).
[4] L. Kambanis, Analysis and modeling of power transmitting systems for advanced marine vehicles, Massachusetts Institute of Technology, June 1995.
[5] O. Bolland, M. Forde, H. B., Air bottoming cycle: Use of gas turbine waste heat for power generaton, Journal of Engineering for Gas Turbines and Power 118 (2) (1996)
[6] A. Poullikkas, An overview of current and future sustainable gas turbine technologies, Renewable and Sustainable Energy Reviews 9 (2005) 409–443.
[7] S. Yousef, H. Najjar, S. Mahmoud, Zaamout, Performance analysis of gas turbine air-bottoming combined system, Energy Conversion and Management 37 (4) (1996) 399–403.
[8] T. Chmielniak, D. Czaja, S. Lepszy, Wykorzystanie układów gazowo-powietrznych w ciepłownictwie (in english: The use of gas turbine air bottoming cycle in heat engineering), Rynek Ciepła REC (2011) 341–352.
[9] T. Chmielniak, S. Lepszy, D. Czaja, The use of airbottoming cycle as a heat source for the carbon dioxide capture installation of a coal fired power unit, Archives of Thermodynamic, IMP Gdansk 32.
[10] Abb zamech gazpetro sp. z o. o. information brochure.
[11] D. Czaja, T. Chmielniak, S. Lepszy, The selection of gas
turbine air bottoming cycle for polish compressor stations, Journal of Power Technologies 93 (2) (2013) 67– 77.
[12] R. Spector, A. Miller, GE LM2500 Aircraft-Derivative Gas Turbine System, General Electric Gas Turbine Library Report GER-3431, 1983.
[13] Z. Ping, H. Saravanamuttoo, Simulation of an advanced twin-spool industrial gas turbine, Journal of Engineering for Gas Turbines and Power 114 (2) (1992) 180–186.
[14] I. Diakunchak, Performance degradation in industrial gas turbines, Journal of Engineering for. Gas Turbines and Power 114 (2) (1992) 161–168.
[15] Tech. rep., EPRI report AP-4943; Electric Power Research Institute.
[16] Gec alsthom technical review no. 9, Tech. rep. (1992).
How to Cite
CZAJA, Daniel; CHMIELNIAK, Tadeusz; LEPSZY, Sebastian. Operation of a gas turbine air bottoming cycle at part load. Journal of Power Technologies, [S.l.], v. 93, n. 5, p. 279--287, dec. 2013. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/484>. Date accessed: 05 aug. 2021.
RDPE 2013 Conference

Most read articles by the same author(s)

Obs.: This plugin requires at least one statistics/report plugin to be enabled. If your statistics plugins provide more than one metric then please also select a main metric on the admin's site settings page and/or on the journal manager's settings pages.