Design optimization of HRSG inlet duct geometry for improving flow uniformity using meta-heuristic algorithm
- 38 Downloads
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.
KeywordsDesign optimization Flow uniformity Genetic algorithm Heat recovery steam generator
Unable to display preview. Download preview PDF.
- 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
- V. Ganapathy, Heat-recovery steam generators: Understand the basics, Chemical Engineering Progress, 92 (8) (1996) 32–45.Google Scholar
- Blevins and D. Robert, Applied fluid dynamics handbook, Van Nostrand Reinhold Co. (1984) 144–153.Google Scholar
- 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
- 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