Thermodynamic Analysis of Gas Turbine Power Plant of PT PLN Belawan Generation Implementation Unit
Abstract
The low quality of the thermodynamic process in a gas turbine power plant results in the waste of potential energy and impacts the power plant's efficiency. Analysing the thermodynamic performance of a gas turbine power plant is crucial to evaluating its efficiency in converting fuel energy into useful work. This analysis helps identify opportunities for improvement and optimise the plant's design for better performance by examining the components (e.g., the compressor, combustion chamber, and turbine). This study aims to evaluate the performance of a Gas Turbine Power Plant (GTPP) through thermodynamic analysis considering the variation of cycle loads. The study was conducted based on the field survey data obtained from the GTPP PT PLN Belawan generation implementation unit. The collected operation data was used to perform a thermodynamic analysis by applying the principles of conservation of mass and energy, along with the laws of thermodynamics. The study examined five cycle load variations: 31.7 MW, 34.3 MW, 48.1 MW, 60.7 MW, and 71.7 MW. Results showed a consistent reduction in the gas turbine heat rate as the load increased, with a significant 53.3% drop in heat rate from 34.3 MW to 71.7 MW. Higher cycle loads also correlated with increased turbine and compressor work, with the turbine producing 55.8% more work than the compressor at 71.7 MW. The turbine's thermal efficiency ranged from 40% to 44%, with potential for a 5% efficiency increase.
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K. Ansar, A. Syuhada, and S. E. Sofyan, “A study of cofiring palm kernel shell on the Nagan Raya coal-fired power
plant,” Polimesin, vol. 21, no. 6, pp. 608–612, 2023,
[Online]. Available: https://ejurnal.pnl.ac.id/polimesin/article/view/4021/3500.
UNIVERSITAS STEKOM, “Daftar pembangkit listrik di
Indonesia,” 2023.
https://p2k.stekom.ac.id/ensiklopedia/Daftar_pembangkit_lis
trik_di_Indonesia (accessed Jul. 02, 2024).
M. J. Moran, H. N. Shapiro, and D. D. Boettner,
Fundamentals Of Engineering Thermodynamics, Eight.
Wiley, 2014.
Y. A. Cengel and M. A. Boles, Thermodynamics An
Engineering Approach, Fifth. McGraw-Hill, 2005.
N. Hasananto, D. B. Darmadi, and L. Yuliati, “Modelling of
load variation effect on the steam power plant heat rate and
performance using Gatecycle,” IOP Conf. Ser. Mater. Sci.
Eng., vol. 1034, no. 1, p. 012048, 2021, doi: 10.1088/1757-
x/1034/1/012048.
P. Breeze, Gas-Turbine Power Generation, 1st Editio.
Elsevier, 2016.
T. K. Ibrahim et al., “Thermal performance of gas turbine
power plant based on exergy analysis,” Appl. Therm. Eng.,
vol. 115, pp. 977–985, 2017, doi:
https://doi.org/10.1016/j.applthermaleng.2017.01.032.
M. F. Ezzat and I. Dincer, “Energy and exergy analyses of a
novel ammonia combined power plant operating with gas
turbine and solid oxide fuel cell systems,” Energy, vol. 194,
p. 116750, 2020, doi:
https://doi.org/10.1016/j.energy.2019.116750.
A. H. Ahmed, A. M. Ahmed, and Q. Y. Hamid, “Exergy and
energy analysis of 150 MW gas turbine unit: A case study,”
J. Adv. Res. Fluid Mech. Therm. Sci., vol. 67, no. 1, pp. 186–
, 2020.
H. Enayatizadeh, A. Arjomand, and M. H. Ahmadi, “Design
and multi-scenario optimization of a hybrid power system
based on a working gas turbine: Energy, Exergy,
Exergoeconomic and Environmental evaluation,” Energy
Reports, vol. 8, pp. 12916–12943, 2022, doi:
https://doi.org/10.1016/j.egyr.2022.09.105.
7 34.3 48.1 60.7 71.7
Actual work (MW)
Cycle load (MW)
Actual turbine work
Actual compressor work
7 34.3 48.1 60.7 71.7
Efficiency (%)
Cycle load (MW)
Thermal efficiency (%) Exergy efficiency (%)
Disseminating Information on the Research of Mechanical Engineering - Jurnal Polimesin Volume 22, No. 4, August 2024 409
V. Mrzljak, I. Poljak, J. Prpić-Oršić, and M. Jelić, “Exergy
analysis of marine waste heat recovery CO2 closed-cycle gas
turbine system,” Pomorstvo, vol. 34, no. 2, pp. 309–322,
, doi: 10.31217/p.34.2.12.
A. Khaliq, K. Choudhary, and I. Dincer, “Exergy analysis of
a gas turbine trigeneration system using the Brayton
refrigeration cycle for inlet air cooling,” Proc. Inst. Mech.
Eng. Part A J. Power Energy, vol. 224, no. 4, pp. 449–461,
Jan. 2010, doi: 10.1243/09576509JPE897.
A. K. Tiwari, M. Islam, and M. N. Khan, “Thermodynamic
Analysis of Combined Cycle Power Plant,” Int. J. Eng. Sci.
Technol., vol. 2, no. 4, pp. 480–491, 2010.
M. Ghazikhani, I. Khazaee, and E. Abdekhodaie, “Exergy
analysis of gas turbine with air bottoming cycle,” Energy,
vol. 72, pp. 599–607, 2014, doi:
https://doi.org/10.1016/j.energy.2014.05.085.
J. Nondy and T. K. Gogoi, “Energy and Exergy Analyses of
a Gas Turbine and Reheat-Regenerative Steam Turbine
Integrated Combined Cycle Power Plant BT - Advances in
Thermofluids and Renewable Energy,” 2022, pp. 233–248.
B. Ahmadi, A. A. Golneshan, H. Arasteh, A. Karimipour,
and Q.-V. Bach, “Energy and exergy analysis and
optimization of a gas turbine cycle coupled by a bottoming
organic Rankine cycle,” J. Therm. Anal. Calorim., vol. 141,
no. 1, pp. 495–510, 2020, doi: 10.1007/s10973-019-09088-6.
M. M. Awaludin Martin Adhy Prayitno, “Exergy Analysis of
Gas Turbine Power Plant 20 MW in Pekanbaru-Indonesia,”
Int. J. Technol., vol. 7, no. 5, pp. 291–319, 2016, doi:
http://dx.doi.org/10.14716/ijtech.v7i5.1329.
W. H. Liu et al., “Extended Electric System Cascade
Analysis (ESCA) for optimal power system targeting
considering generation flexibility and heat rate factor,”
Energy Procedia, vol. 158, pp. 4190–4197, 2019, doi:
https://doi.org/10.1016/j.egypro.2019.01.810.
R. M. Abd El-Maksoud et al., “Exergy Analysis for Gas
Turbine,” Gsj, vol. 10, no. 7, pp. 356–366, 2022, [Online].
Available: www.globalscientificjournal.com.
DOI: http://dx.doi.org/10.30811/jpl.v22i4.5365
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