Journal of Mechanical Science and Technology

, Volume 32, Issue 2, pp 947–958 | Cite as

Design optimization of HRSG inlet duct geometry for improving flow uniformity using meta-heuristic algorithm

  • Hyun-Kyoo So
  • Tae-Hyun Jo
  • Yong-Han Lee
  • Bon-Chan Koo
  • Do-Hyung Lee


The HRSG extensively affects all performance of CCPPs. The inlet duct geometry of an HRSG is the most essential part for determining heat exchange in the main body, in terms of flow uniformity. In the present study, numerical analysis of the HRSG flow characteristics and design optimization of inlet duct geometry for improving flow uniformity at the front section of the main body were performed to meet the trend requirements. A new inlet duct geometry, which has maximum flow uniformity, was proposed through design optimization procedures using a genetic algorithm. Specifically, the actual operating condition of the D-top model HRSG was applied and the pressure recovery coefficient and diffuser efficiency were considered. In the optimized design, a recirculation area was formed at the top internal wall of the second expansion stage. Results indicate that the forming of the recirculation area improves flow uniformity by rotating movement and spreading the high-speed flow.


Design optimization Flow uniformity Genetic algorithm Heat recovery steam generator 


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  1. [1]
    F. Alobaid, K. Karner, J. Belz, B. Epple and H. G. Kim, Numerical and experimental study of a heat recovery steam generator during start-up procedure, Energy, 64 (2014) 1057–1070.CrossRefGoogle Scholar
  2. [2]
    H. Hajabdollahi, P. Ahmadi and I. Dincer, An exergy-based multi-objective optimization of a Heat recovery steam generator (HRSG) in a Combined cycle power plant (CCPP) using evolutionary algorithm, International Journal of Green Energy, 8 (1) (2011) 44–64.CrossRefGoogle Scholar
  3. [3]
    P. Ahmadi, I. Dincer and M. A. Rosen, Exergoeconomic and environmental analyses and evolutionary algorithm based multi-objective optimization of combined cycle power plants, Energy, 36 (10) (2011) 5886–5898.CrossRefGoogle Scholar
  4. [4]
    N. Patil, M. Kavade and A. Patil, Study of gas flow behavior in HRSG inlet duct with CFD tools, International Journal of Mechanical Engineering applications Research, 3 (01) (2012) 146–151.Google Scholar
  5. [5]
    V. Ganapathy, Heat-recovery steam generators: Understand the basics, Chemical Engineering Progress, 92 (8) (1996) 32–45.Google Scholar
  6. [6]
    P. Hanafizadeh, S. Falahatkar, P. Ahmadi and M. M. Siahkalroudi, A novel method for inlet duct geometry improvement of heat recovery steam generators, Applied Thermal Engineering, 89 (2015) 125–133.CrossRefGoogle Scholar
  7. [7]
    M. Valdes, A. Rovira and M. D. Duran, Influence of the heat recovery steam generator design parameters on the thermoeconomic performances of combined cycle gas turbine power plants, International Journal of Energy Research, 28 (14) (2004) 1243–1254.CrossRefGoogle Scholar
  8. [8]
    A. Franco and A. Russo, Combined cycle plant efficiency increase based on the optimization of the heat recovery steam generator operation parameters, International Journal of Thermal Sciences, 41 (9) (2002) 843–859.CrossRefGoogle Scholar
  9. [9]
    A. G. Kaviri, M. N. M. Jaafar and T. M. Lazim, Exergoenvironmental optimization of heat recovery steam generators in combined cycle power plant through energy and exergy analysis, Energy Conversion and Management, 67 (2013) 27–33.CrossRefGoogle Scholar
  10. [10]
    T. S. Kim, D. K. Lee and S. T. Ro, Analysis of thermal stress evolution in the steam drum during start-up of a heat recovery steam generator, Applied Thermal Engineering, 20 (2000) 977–992.CrossRefGoogle Scholar
  11. [11]
    C. Casarosa, F. Donatini and A. Fanco, Thermoeconomic optimization of heat recovery steam generators operating parameters for combined plants, Energy, 29 (2004) 389–414.CrossRefGoogle Scholar
  12. [12]
    N. Hegde, I. Han, T. W. Lee and R. P. Roy, Flow and heat transfer in heat recovery steam generators, Journal of Energy Resources Technology, 129 (3) (2007) 232–242.CrossRefGoogle Scholar
  13. [13]
    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, Transactions-American Society of Mechanical Engineers Journal of Engineering for Gas Turbines and Power, 124 (3) (2002) 496–502.CrossRefGoogle Scholar
  14. [14]
    H. S. Shin, D. H. Kim, H. J. Ahn, S. M. Choi and G. C. Myung, Investigation of the flow pattern in a complex inlet duct of a heat recovery steam generator, Energy and Power, 2 (1) (2012) 1–8.CrossRefGoogle Scholar
  15. [15]
    M. Ameri and F. J. Dorcheh, The CFD modeling of heat recovery steam generator inlet duct, International Journal of Energy Engineering, 3 (3) (2013) 74.CrossRefGoogle Scholar
  16. [16]
    P. Hanafizadeh, M. M. Siahkalroudi and P. Ahmadi, Experimental and numerical investigation of optimum design of semi industrial heat recovery steam generator inlet duct, Applied Thermal Engineering, 104 (2016) 375–385.CrossRefGoogle Scholar
  17. [17]
    S. M. Choi, H. Moon, S. H. Kim, J. S. Park and H. H. Cho, The effects of thermal spreaders on reducing thermal cracks in heat recovery steam generators, Applied Thermal Engineering, 108 (2016) 1251–1260.CrossRefGoogle Scholar
  18. [18]
    Blevins and D. Robert, Applied fluid dynamics handbook, Van Nostrand Reinhold Co. (1984) 144–153.Google Scholar
  19. [19]
    R. Stocki, A method to improve design reliability using optimal Latin hypercube sampling, Computer Assisted Mechanics and Engineering Sciences, 12 (4) (2005) 393.Google Scholar
  20. [20]
    O. Yeniay, A comparative study on optimization methods for the constrained nonlinear programming problems, Mathematical Problems in Engineering, 2 (2005) 165–173.MathSciNetCrossRefMATHGoogle Scholar
  21. [21]
    H. Walter, C. Dobias, F. Holzleithner and R. Hofmann, Numerical analysis of the fluid flow in a channel between gas turbines and heat recovery steam generator, 2nd International Conference on Fluid Mechanics and Heat and Mass Transfer (2011).Google Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Hyun-Kyoo So
    • 1
  • Tae-Hyun Jo
    • 1
  • Yong-Han Lee
    • 1
  • Bon-Chan Koo
    • 2
  • Do-Hyung Lee
    • 1
  1. 1.Department of Mechanical Design EngineeringHanyang UniversityAnsanKorea
  2. 2.Department of Mechanical EngineeringHanyang UniversitySeoulKorea

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