# Flow-3D 모형을 이용한 순환수취수펌프장 내 흐름현상 연구

• Received : 2019.01.11
• Accepted : 2019.04.05
• Published : 2019.04.30

#### Abstract

Indonesia has a very short supply of electricity. As a solution to this problem, plans for construction of thermal power plants are increasing. Thermal power plant require the cooling water system to cool the overheated engine and equipment that accompany power generation, and the circulation water pump chamber among the cooling water system are generally designed according to the ANSI (1998) standard. In this study, the design criterion $20^{\circ}$ for the spreading angle of the ANSI (1998) of the layout of the circulating water pump chamber can not be satisfied on the K-coal thermal power plant site condition in Indonesia. Therefore, 3-D numerical model experiment was carried out to obtain a hydraulically stable flow and stable structure. The Flow-3D model was used as numerical model. In order to examine the applicability of the Flow-3D model, the flow study results around the rectangular structure of Rodi (1997) and the numerical analysis results were compared around the rectangular structures. The longitudinal velocity distribution derived from numerical analysis show good agreement. In order to satisfy the design velocity in the circulating water pump chamber, a rectangular baffle favoring velocity reduction was applied. When the approach velocity into the circulating water pump chamber was occurred 1.5 m/s ~ 2.5 m/s, the angle of the separation flow on the baffle was occurred about $15^{\circ}{\sim}20^{\circ}$. By placing the baffle below the separation flow angle downstream, the design velocity of less than 0.5 m/s was satisfied at inlet bay.

#### File

Fig. 1. Diffusion angle of CWP chamber boundary [4]

Fig. 2. CWP chamber

Fig. 3. The geometry of Cooling tower basin and CWP chamber

Fig. 5. Examine section for the design velocity (unit :m/s)

Fig. 6. Examine section for the design velocity (unit : m/s)

Fig. 7. Examine section for the design velocity (Case 6)

Fig. 8. Velocity development around column (unit : m/s)

Fig. 8. Velocity development around column (unit : m/s) (Continued)

Fig. 9. Water level in Cooling tower basin and CWP chamber

Fig. 4. 3D model construction

Table 1. Status of diffusion angle of CWP chamber

Table 2. Numerical analysis cases and input data

Table 3. Approach velocity for each bay (unit : m/s)

#### Acknowledgement

Supported by : 국토교통부

#### References

1. J. P. Tullis, "Modeling in Design of Pumping Pits", Journal of the Hydraulic Division, Vol. 105 (HY9), pp. 1053-1063, 1979.
2. C. E. Sweeney, R. A. Elder, D. Hay, "Pump Sump Design Experience: Summary", Journal of the Hydraulic Division, Vol. 108 (HY3), pp. 361-377, 1982.
3. G. E. Hecker, "Scale Effects in Modeling Vortices", Symposium on Scale Effects in Modeling Hydraulic Structures, International Association for Hydraulic Research, 1984.
4. ANSI, Pump Intake Design, New Jersey, USA, 1998. Available From: https://webstore.ansi.org/standards/hi/ansihi1998
5. KEPRI, Design of Structure of the Thermal and Nuclear Power Plant, 1997.
6. Y. K. Yi, S. h. Cheong, C. W. Kim, "Hydraulic and Numerical Model Experiments of Flows in Circulation Water Pump Chambers", Journal of KWRA, Vol. 38, No. 8, pp. 631-643, 2005. DOI: http://dx.doi.org/10.3741/JKWRA.2005.38.8.631
7. Daewoo E&C, Benghazi North Combined Cycle Power Plant, Libya - Hydraulic Calculation for C.W System, 2004.
8. Hyundai E&C, Tripoli West 4$\times$350 MW Power Plant Project - Calculation for Circ. Water Intake Structure, 2014.
9. Hyundai E&C, Kalselteng 2 CFSPP (2$\times$100 MW), 2018.
10. Daelim, Pagbilao 420 MW Unit 3 Coal-Fired Power Project - Hydraulic Analysis for Intake and Discharge System, 2015.
11. Hyundai E&C, Talimarjan Thermal Power Plant Expansion Project, 2014.
12. Posco E&C, Hassyan 1 Clean Coal Project, 2015.
13. Hyundai E&C, Mirfa Independent Water and Power Project - Hydraulic Calculation for Cooling Water System, 2015.
14. Kepco E&C Gangneung Anin Thermal Power Plant Units 1 & 2 (1,040 MW$\times$2), 2016.
15. Samsung C&T, S-Oil Distillation Recovered Heat Generation Project, 2015.
16. Korea Western Power, The 2nd PyeongTaek Combined Cycle Power Plant 950 MW$\times$1, 2013.
17. Y. K. Yi, S. h. Cheong, C. W. Kim, J. G. Kim. "Hydraulic and Numerical Model Experiments of Circulation Water Intake for Boryeong Thermal Power Plant No. 7 and No. 8", Journal of KSCE, Vol. 26, No. 5B, pp. 459-467, 2006.
18. B. J. Park, H. K. Song, Y. H. Hur, S. W. Kang, Y. G. Park, "Estimation of Hydraulic Status on Intake Structure at Gunsan Combined Cycle Power Plant by Numerical and Physical Model Test", Proceedings of KWRA, pp. 1884-1888, 2009.
19. Flow Science. Flow-3D User's Manual. Los Alamos, NM, USA, 2016.
20. W. Rodi, "Comparison of LES and RANS calculations of the flow around bluff bodies", Journal of Wind Engineering and Industrial Aerodynamics, Vol. 69, No. 71, pp. 55-75, 1997. DOI: https://doi.org/10.1016/S0167-6105(97)00147-5