Gas turbine selection for feedwater repowering
Abstract
The paper presents the concept of using hot exhaust gases from gas turbines with different power output to heatup feedwater in a supercritical power plant unit. The gas turbine is connected to the system, bypassing a highpressure regenerative heat exchanger. The benefits of this solution are discussed and the factors to be taken intoaccount are listed. The criteria to be met by the gas turbine to ensure safe and optimal connection to the steamsystem are discussed. A reference unit model with 800 MW electric power (an existing super-critical power unit inPoland—Belchatow II) was created and presented in a previous paper by the same authors. This model was latersupplemented with a gas turbine (three different models with different levels of power production are taken intoconsideration). The system with a gas turbine enjoys greater power and efficiency over the steam cycle alone. Thepower increase is due to the extra power generated by the gas turbine and the higher output of the steam systemcaused by increasing the steam flow through the turbine (closed extraction to the "bypassed" high-pressure heatexchanger). System power is changed linearly with the steam flow and reaches the nominal point 40..50% higherthan without an added gas turbine (depending on gas turbine power and efficiency). The efficiency characteristicsof the whole system are flatter, with higher values.References
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Technologies 92 (2012) 127–134.
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and Diagnostic Software, 6th Edition (2009).
[16] J. Kotowicz, H. Łukowicz, . Bartela, S. Michalski, Validation of
a program for supercritical power plant calculations, Archives
of Thermodynamics 32 (4) (2011) 81–89.
[17] On prediction of steam turbine efficiencies - an introduction to
spencer, cotton, and cannon method, Technical University of
Berlin Institute for Energy Engineering (1998).
G. di Montenegro, A. Peretto, A parametric thermodynamic
evaluation of high performance gas turbine based power cycles,
Journal of Engineering for Gas Turbines and Power 132
(2010) Article number022001.
[2] T. Korakianitis, J. Grantstrom, P. Wassingbo, A. Massardo,
Parametric performance of combined-cogeneration power
plants with various power and efficiency enhancements, Journal
of Engineering for Gas Turbines and Power 127 (2005)
65–72.
[3] M. Santarelli, M. Cali, R. Borchiellini, Thermoeconomic analysis
of a combined cycle and an irsofc plant and carbon exergy
tax influence on advanced systems economic competitiveness,
American Society of Mechanical Engineers, Advanced
Energy Systems Division (Publication) AES 41 (2001) 611–
619.
[4] H. Brueckner, D. Bergmann, H. Termuehlen, Various concepts
for topping steam plants with gas turbines, in: Americal Power
Conference, 1992, pp. 1–14.
[5] T. Koike, Y. Noguchi, Repowering of thermal power plants as
fully-fired combined cycle generating plants, Tech. rep., Chubu
Electric Power Co & Hitachi Ltd. (1999).
[6] W. Budzianowski, Negative net co2 emissions from oxydecarbonization
of biogas to h2, International Journal of
Chemical Reactor Engineering 8 (2010) A156.
[7] J. Milewski, J. Lewandowski, A. Miller, Reducing co2 emissions
from a gas turbine power plant by using a molten carbonate
fuel cell, Chemical and Process Engineering 29 (4)
(2008) 939–954.
[8] J. Kupecki, J. Milewski, A. Szczesniak, R. Bernat, K. Motylinski,
Dynamic numerical analysis of cross-, co-, and countercurrent
flow configuration of a 1 kw-class solid oxide fuel
cell stack, International Journal of Hydrogen Energy 40 (45)
(2015) 15834–15844.
[9] J. Milewski, M. Wołowicz, Ł. Szabłowski, J. Kuta, Control strategy
for a solid oxide fuel cell fueled by natural gas operating in
distributed generation, Energy Procedia 29 (2012) 676–682.
[10] A. Miller, Turbiny gazowe i układy parowo-gazowe,
Wydawnictwa Politechniki Warszawskiej, 1984.
[11] W. C. Stenzel, D. M. Sopocy, S. E. Pace, Repowering existing
fossil steam plants, Tech. rep., SEPRIL–Generation Power
Solution (1999).
[12] J. M. Escosa, L. M. Romeo, Optimizing co2 avoided cost by
means of repowering, Applied Energy 86 (2009) 2351–2358.
[13] C. C. Maslak, L. O. Tomlinson, Ge combined-cycle experience,
Tech. rep., GE Power Generation (1994).
[14] M. Wołowicz, J. Milewski, K. Badyda, Feedwater repowering
of 800 mw supercritical steam power plant, Journal of Power
Technologies 92 (2012) 127–134.
[15] GateCycleTM – Getting Started and Installation Guide – Optimization
and Diagnostic Software, 6th Edition (2009).
[16] J. Kotowicz, H. Łukowicz, . Bartela, S. Michalski, Validation of
a program for supercritical power plant calculations, Archives
of Thermodynamics 32 (4) (2011) 81–89.
[17] On prediction of steam turbine efficiencies - an introduction to
spencer, cotton, and cannon method, Technical University of
Berlin Institute for Energy Engineering (1998).
Published
2015-12-30
How to Cite
WOLOWICZ, Marcin; BADYDA, Krzysztof.
Gas turbine selection for feedwater repowering.
Journal of Power Technologies, [S.l.], v. 95, n. 4, p. 302--308, dec. 2015.
ISSN 2083-4195.
Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/398>. Date accessed: 22 dec. 2024.
Issue
Section
Power Plant
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