Thermodynamic Analysis of Effects of the Inlet Air Cooling on Cycle Performance in Combined Brayton-Diesel Cycle

Abstract

In the present study, the effects of inlet air cooling on compound cycle performance in a diesel gas turbine engine system where waste heat is used in the composite power system in the sustainable energy system were investigated thermodynamically. The effects of the inlet air cooling the system that enhances power production and the resulting thermal efficiency values were analyzed based on various operational variables (gas turbine pressure ratio, diesel engine compression ratio, gas turbine inlet and fresh air inlet temperatures, etc.). The energy losses in each system component were determined and the second law efficiency of the system was determined based on the introduced operational parameters. The gas turbine unit in the model included a gas generator with two compressors and a high-pressure turbine, and a low-pressure power turbine running on a separate shaft. The diesel engine and gas-generator exhaust gases were mixed and expanded in a low-pressure turbine, leading to the production of power with the waste energy. In the cycle, an intake air cooler, an intercooler and a recuperative air pre-heater were used. In the intake air cooling cycle, the power increase was around 15% when the pressure rate of the low-pressure compressor was 3.5. Natural gas was used as fuel in the thermodynamic model. The cycle irreversibilitywas used in the calculations based onthe thermodynamic concepts.

Keywords:

Brayton-diesel cycle, Combined power system, Energy, Exergy.

DOI: 10.17350/HJSE19030000166

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References

1. Khana MN, Tlilib I. New advancement of high performance
for a combined cycle power plant: Thermodynamic analysis.
Case Studies in Thermal Engineering 12 (2018) 166-175.

2. Descombes G, Boudigues S. Modelling of waste heat
recovery for combined heat and power applications.
Applied Thermal Engineering Elsevier 29, 13 (2009) 2610.
10.1016/j.applthermaleng.2008.09.019.

3. El-Awad MM, Siraj MA. A Combined Diesel-Engine
Gas-TurbineSystem for Distributed Power Generation.
International Conference on Chemical, Biological and
Medical Sciences (ICCBMS), Kuala Lumpur Malaysia, 2012

4. Altosole M, Benvenuto G, Campora U, Laviola M, Trucco A.
Waste Heat Recovery from Marine Gas Turbines and Diesel
Engines, Energies. 10 (2017) 1-24.

5. Dzida M, Mucharski J. On the possible increasing of
efficiency of ship power plant with the system combined
of marine diesel engine, gas turbine and steam turbine in
case of main engine cooperation with the gas turbine fed in
parallel and the steam turbine. Polish maritime research. 16
(2009) 40-44.

6. Durmusoglu Y, Kocak G. Exergetic efficiency analysis of
a combined power plant of a container ship. Journal of
Thermal Engineering, 5 (2019) 1-13.

7. Dzida M. Possible efficiency increasing of ship propulsion
and marine power plant with the system combined of
marine diesel engine, gas turbine and steam turbine.
Advances in Gas Turbine Technology. (2011) pp. 45-68.
DOI:10.5772/24018.

8. Al Madani H. Gas turbine performance enhancement by
intake air cooling. International Journal of Exergy, 3 (2006)
164-173.

9. Ibrahim TK, Rahman MM, A Abdalla N. Improvement of gas
turbine performance based on inlet air cooling systems: A
technical review. International Journal of Physical Sciences.
6 (2011) 620-627.

10. Kumar A., Sanjay M. and Prasad L. Parametric analysis of
cooled gas turbine cycle with evaporative inlet air cooling.
International Journal of Scientific & Engineering Research.
3 (2012) 3, 1-8.

11. Zaki GM, Jassim RK, Alhazmy MM. Energy, exergy and
thermoeconomics analysis of water chiller cooler for gas
turbines intake air cooling. Smart Grid and Renewable
Energy. 2 (2011) 190-205.

12. Stone R. Introduction to Internal Combustion Engines. The
Mac Millan Press LMTD. 1992.

13. Çengel YA, Boles BA. Thermodynamics and Engineering
Approach. McGraw Hill-Science, 6th edition. 2001.

14. Mohammadkhani F, Khalilarya SH, Mirzaee I. 2012. Energetic
and Exergetic Analysis of Internal Combustion Engine
Cogeneration System. The Journal of Energy: Engineering
& Management. 2 (2012) 4 24-31.

15. Reddy S.S.K., Pandurangadu V. and S.P.A. Hussai S.P.A.
Effect of turbo charging on volumetric efficiency in
an insulated diesel engine for improved performance.
International Journal of Modern Engineering Research
(IJMER). 3, (2013) 2 674-677.

16. Ebrahimi R. Thermodynamic modelling of performance of
an irreversible Diesel cycle with engine speed, ature and
Science. 7 (2009) 9 78-82.

17. Qian JY, Zhang Y, Zhuge W. Air supply system design
of a diesel_brayton combined cycle. Proceedings
of the Institution of Mechanical Engineers, Part A:
Journal of Power and Energy. (2018) https://doi.
org/10.1177/0957650918810133

18. Sreedharan H, Reshma JR, Jacob JK, Sivakumar VV. Energy
and exergy analysis on 350 MW combined cycle power plant.
European Journal of Technology and Design. 12 (2016) 2
72-78.

19. Abuşoğlu A, Kanoğlu M. Exergetic and thermoecomnomic
analyses of diesel engine powered cogeneration: Part 1-
Formulations. Journal of Applied Thermal Engineering. 29
(2009) 234-241.

20. Karali R, Öztürk İT. Effiency improvement of gas turbine
cogeneration systems. Improving the efficienc of gas
turbine cogenartion systems. Technical gazette 25 suppl 1
(2017), 21-27. DOI: 10.17559/TV-20140509154652

21. Karaca, S. 2015. Application of energy and exergy analysis
due to different angles of propeller blades to a turbocharged
diesel engine vessel. Master thesis. Karadeniz Technical
Iniversity, Trabzon.
Published
2020-03-26
How to Cite
Sarac, B., & Ayhan, T. (2020). Thermodynamic Analysis of Effects of the Inlet Air Cooling on Cycle Performance in Combined Brayton-Diesel Cycle. Hittite Journal of Science & Engineering, 7(1), 07-16. Retrieved from https://www.hjse.hitit.edu.tr/hjse/index.php/HJSE/article/view/457
Section
ENGINEERING