Browse > Article
http://dx.doi.org/10.12652/Ksce.2022.42.6.0815

On Vortex Reduction Characteristics of Pump Sump Circulating Water Intake Basin of Power Plant Using Hydraulic Experiment  

Eom, Junghyun (Korea Institute of Civil Engineering and Building Technology)
Lee, Du Han (Korea Institute of Civil Engineering and Building Technology)
Kim, Hung Soo (Inha University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.42, no.6, 2022 , pp. 815-824 More about this Journal
Abstract
Among the main facilities of the power plant, the circulating water used for cooling the power generation system is supplied through the Circulation Water Intake Basin (CWIB). The vortexes of various types generated in the Pump Sump (PS) of CWIB adversely affect the Circulation Water Pump (CWP) and pipelines. In particular, the free surface vortex accompanied by air intake brings about vibration, noise, cavitation etc. and these are the causes of degradation of CWP performance, damage to pipelines. Then power generation is interrupted by the causes. Therefore, it is necessary to investigate the hydraulic characteristics of CWIB through the hydraulic model experiment and apply an appropriate Anti Vortex Device (AVD) that can control the vortex to enable smooth operation of the power plant. In general, free surface vortex is controlled by Curtain Wall (CW) and the submerged vortex is by the anti vortex device of the curtain wall. The detailed specifications are described in the American National Standard for Pump Intake Design. In this study, the circulating water intake part of the Tripoli West 4×350 MW power plant in Libya was targeted, the actual operating conditions were applied, and the vortex reduction effect of the anti vortex device generated in the suction tank among the circulating water intake part was analyzed through a hydraulic model experiment. In addition, a floor splitter was basically applied to control the submerged vortex, and a new type of column curtain wall was additionally applied to control the vortex generated on the free surface to confirm the effect. As a result of analyzing the hydraulic characteristics by additionally applying the newly developed Column Curtain Wall (CCW) to the existing curtain wall, we have found that the vortex was controlled by forming a uniform flow. In addition, the vortex angle generated in the circulating water pump pipeline was 5° or less, which is the design standard of ANSI/HI 9.8, confirming the stability of the flow.
Keywords
Circulation water intake basin; Vortex; Anti vortex device; Curtain wall; Column curtain wall;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Byeon, H. H., Kim, S. J. and Yoon, B. M. (2020). "A study of the velocity distribution and vorticity measurement in the pump sump using piv." Journal of the Korean Society of Civil Engineers, KSCE, Vol. 40, No. 2, pp. 145-156 (in Korean).   DOI
2 Choi, J. W., Choi, Y. D., Lim, W. S. and Lee, Y. H. (2009). "Numerical analysis on the flow uniformity in a pump sump model with multi pump intake." Proceedings of the Korean Society for fluid Machinery, Vol. 12, No. 4, pp. 14-22 (in Korean).   DOI
3 Hyundai Engineering (2014). Tripoli west 4 × 350 mw power plant project.
4 Kabiri-Samani, A. R. and Borghei, S. M. (2012). "Effects of anti-vortex plates on air entrainment by free vortex." Scientia Iranica, Vol. 20, No. 2, pp. 251-258.
5 Kim, K. Y., Choi, J. H., Kim, J. Y., Ko, K. H., Kim, J. H., Cho, J. H., Lee, C. B., Kim, K. S. and Son, J. H. (1996). "Hydraulic model test of circulating water pump for thermal power plant." Proceedings of the Fall Conference of the Korean Society of Mechanical Engineers B, pp. 37-42 (in Korean).
6 Lee, Y. H., Kim, S. J., Chen, Z., Singh, P. M. and Choi, Y. D. (2016). "Design and fundamental test on the pump sump scaled model." Korean Society for fluid Machinery Winter Conference, Vol. 2016, No. 11, pp. 355-356 (in Korean).
7 Sarkardeh, H., Zarrati, A. R. and Roshan, R. (2010). "Effect of intake head wall and trash rack on vortices." Journal of Hydraulic Research, Vol. 48, No. 1, pp. 108-112.
8 Shabayek, S. A. (2010). "Improving approach flow hydraulics at pump intakes." International Journal of Civil & Environmental Engineering, IJCEE-IJENS, Vol. 10, No. 06.
9 Sweeney, C. E., Elder, R. A. and Hay, D. (1982). "Pump sump design experience Summary." Journal of Hydraulic Division, Vol. 108, No. 3, pp. 361-377.   DOI
10 ANSI/HI 9.8. (1998). American national standard for pump intake design, Hydraulic Institute, Parsippany, New Jersey, USA.
11 Norizan, T. A., Harun, Z., Abdullah, S. and Mohtar, W. H. M. W. (2019). "Effects of floor splitter height on the effectiveness of swirl angle reduction in pump intake." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, Vol. 57, No. 1, pp. 32-39.