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:: Volume 14, Issue 2 (8-2025) ::
ieijqp 2025, 14(2): 0-0 Back to browse issues page
Investigating The Effect of Removing Gas Turbine Exhaust Silencers on The Input Flow to The Recovery Boiler of a Combined Cycle Power Plant
Abbas Hosain zadeh nasrabadi , Ebrahim Goshtasbi Rad *1 , Edris Ghonodi
Abstract:   (100 Views)

In this research, the exhaust system of a combined cycle power plant has been studied using a numerical method for both combined and gas cycle situations. The downstream pressure (in the exhaust part) plays an important role in determining the efficiency of the power plant. The location of the silencer in the exhaust system of the power plant is before the damper diverter, which increases the pressure drop by 75.62 Pa in the exhaust system with respect to the combined cycle condition. In this research, the silencer was transferred into the bypass exhaust stack, which in the combined cycle state caused a slight decrease in pressure drop by 478.21 Pa and non-uniformity of the exhaust flow velocity (input to the recovery boiler) and increased pressure drop by 318.23 Pa in the gas cycle state. To make the output flow speed uniform in this exhaust system, two improvement designs have been studied. In the first design, the length of the expansion channel was increased, which reduced the pressure drop up to 97% and made the output flow speed uniform in the combined cycle state. In the second design, a porous sheet was used inside the expansion channel, which increased the pressure drop in the new exhaust system by 219.54 Pa compared to the first design in combined cycle mode and made the exhaust output flow speed uniform.
 

Keywords: Exhaust system, Silencer, Gas turbine, combined cycle.
     
Type of Study: Applicable |
Received: 2023/09/20 | Accepted: 2025/08/8 | Published: 2025/08/10
References
1. [1] م، نظری، "طراحی سیستم جهت سیستم کنترل توربین¬های گازی 25 مگاواتی"، پایان¬نامه کارشناسی ارشد، دانشگاه تربیت شهید رجائی، 1391.
2. [2] م، بیدی و ف، هاشمی و س، کیا و ا، محمدی، "تحلیل ترمودینامیکی روش¬های کاهش مصرف داخلی نیروگاه سیکل ترکیبی کرمان"، نشریه علمی-پژوهشی کیفیت و بهره¬وری صنعت برق ایران، سال پنجم، شماره9، 1395.
3. [3] R. A. Morris, "Gas Turbine Exhaust Systems - Design Considerations.," Am. Soc. Mech. Eng., 1987. [DOI:10.1115/87-GT-238]
4. [4] B. E. Lee, S. B. Kwon, and C. S. Lee, "On the effect of swirl flow of gas turbine exhaust gas in an inlet duct of heat recovery steam generator," J. Eng. Gas Turbines Power, vol. 124, no. 3, pp. 496-502, 2002. [DOI:10.1115/1.1473156]
5. [5] C. Jayatunga, "An aerodynamic study of industrial gas turbine exhaust turbines," Doctoral Thesis, Loughborough University, 2005.
6. [6] N. Hegde, I. Han, T. W. Lee, and R. P. Roy, "Flow and heat transfer in heat recovery steam generators," J. Energy Resour. Technol. Trans. ASME, vol. 129, no. 3, pp. 232-242, 2007. [DOI:10.1115/1.2751505]
7. [7] ج، قاسمی و ا، نظری، "بررسی تأثیر دمپر دودکش در پارامترهای ترمودینامیکی و حرارتی بویلر بازیاب نیروگاه سیکل ترکیبی سنندج"، بیست و پنجمین کنفرانس سالیانه مهندسی مکانیک ایران، تهران، دانشگاه تربیت مدرس، 1396.
8. [8] M. Lakshmiraju and J. Cui, "Numerical investigation of pressure loss reduction in a power plant stack," Appl. Math. Model., vol. 31, no. 9, pp. 1915-1933, 2007. [DOI:10.1016/j.apm.2006.06.016]
9. [9] S. Bayraktar, A. Safa, and T. Yilmaz, "Cfd and analytical analysis of exhaust system of a gas turbine used in a ship," AIP Conf. Proc., vol. 936, no. January 2007, pp. 619-622, 2007. [DOI:10.1063/1.2790223]
10. [10] M. Pinelli and G. Bucci, "Numerical based design of exhaust gas system in a cogeneration power plant," Appl. Energy, vol. 86, no. 6, pp. 857-866, 2009. [DOI:10.1016/j.apenergy.2008.08.016]
11. [11] A. Mohajer, A. Noroozi, and S. Norouzi, "Optimization of diverter box configuration in a V94.2 gas turbine exhaust system using numerical simulation," World Acad. Sci. Eng. Technol., vol. 33, no. 9, pp. 566-571, 2009.
12. [12] H. Shin, D. Kim, H. Ahn, S. Choi, and G. Myoung, "Investigation of the Flow Pattern in a Complex Inlet Duct of a Heat Recovery Steam Generator," Energy and Power, vol. 2, no. 1, pp. 1-8, 2012. [DOI:10.5923/j.ep.20120201.01]
13. [13] M. Ameri and F. J. Dorcheh, "The CFD Modeling of Heat Recovery Steam Generator Inlet Duct," Int. J. Energy Eng., vol. 3, no. 3, pp. 74-79, 2013. [DOI:10.5963/IJEE0303003]
14. [14] P. Hanafizadeh, M. M. Siahkalroudi, and P. Ahmadi, "Experimental and numerical investigation of optimum design of semi industrial heat recovery steam generator inlet duct," Appl. Therm. Eng., vol. 104, pp. 375-385, 2016. [DOI:10.1016/j.applthermaleng.2016.05.024]
15. [15] H. K. So, T. H. Jo, Y. H. Lee, B. C. Koo, and D. H. Lee, "Design optimization of HRSG inlet duct geometry for improving flow uniformity using meta-heuristic algorithm," J. Mech. Sci. Technol., vol. 32, no. 2, pp. 947-958, Feb. 2018. [DOI:10.1007/s12206-018-0145-x]
16. [16] A. A. Zhinov, D. V. Shevelev, A. K. Karyshev, and P. A. Anan'ev, "The numerical research of the gas flow in the exhaust duct of the gas turbine with a waste heat boiler," Ain Shams Eng. J., vol. 9, no. 4, pp. 1325-1334, 2018. [DOI:10.1016/j.asej.2016.08.007]
17. [17] J. Yi and S. Ju, "Simulation Study on Noise Reduction Performance of Thickness of Sound Absorber Films in Industrial Gas Turbine Muffler," in IOP Conference Series: Materials Science and Engineering, 2019, vol. 472, no. 1. [DOI:10.1088/1757-899X/472/1/012051]
18. [18] M. Maleki, A. Aslani, Z. Zolfaghari, R. Zahedi, "Advanced bibliographic analysis on the development of natural gas combined cycle power plant with CO2 capture and storage technology", Sustainable Energy Technologies and Assessments, Vol. 52, 102339, 2022. [DOI:10.1016/j.seta.2022.102339]
19. [19] B. Faqihi, F. Ghaith, " A comprehensive review and evaluation of heat recovery methods from gas turbine exhaust systems", Int. J. of Thermofluids, Vol. 18, 100347, 2023. [DOI:10.1016/j.ijft.2023.100347]
20. [20] M. A. Motamed, M. Genrup, L. O. Nord, " Part-load thermal efficiency enhancement in gas turbine combined cycles by exhaust gas recirculation", Applied Thermal Engineering, Vol. 244, 122716, 2024. [DOI:10.1016/j.applthermaleng.2024.122716]
21. [21] B. Faqihi, F. Ghaith, " Enhancement of waste heat recovery from exhaust stack silencers in A
22. simple cycle gas turbine", Int. J. of Thermofluids, Vol. 27, 101237, 2025. [DOI:10.1016/j.ijft.2025.101237]
23. [22] ANSYS Fluent User's Guide, Release 19.2, 2018, page 832.


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Hosain zadeh nasrabadi A, Goshtasbi Rad E, Ghonodi E. Investigating The Effect of Removing Gas Turbine Exhaust Silencers on The Input Flow to The Recovery Boiler of a Combined Cycle Power Plant. ieijqp 2025; 14 (2)
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Volume 14, Issue 2 (8-2025) Back to browse issues page
نشریه علمی- پژوهشی کیفیت و بهره وری صنعت برق ایران Iranian Electric Industry Journal of Quality and Productivity
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