Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical Investigation on the Applicability of Wave-Induced Swirl Water Chamber for Wave Power Generation in Coastal Water of Korea

파력발전을 위한 파유기 회전수류 유수실의 국내 연안 적용 가능성에 대한 수치해석적 조사

  • Choi, Jung-Kyu (Naval Architecture and Ocean Engineering, Chungnam National University) ;
  • Kim, Hyoung-Tae (Naval Architecture and Ocean Engineering, Chungnam National University)
  • 최정규 (충남대학교 선박해양공학과) ;
  • 김형태 (충남대학교 선박해양공학과)
  • Received : 2013.02.27
  • Accepted : 2013.12.18
  • Published : 2013.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, a wave-induced swirl water chamber (SWC) for breakwater and wave power generation is introduced and its applicability to wave power generation in the coastal waters of Korea is investigated. The SWC type of wave power generation is a way to drive a turbine using the unidirectional swirl flow that is induced in the back of a curtain wall of a breakwater due to incident waves. The typical wave characteristics are obtained by analyzing the annual statistical wave data from KHOA (Korea Hydrographic and Oceanographic Administration). A numerical analysis is carried out on the variations in the SWC entrance height, wave height, and different installation conditions. For the numerical analysis, a commercial code, Fluent based on FVM, is used. As the entrance height decreases, the mass flow rate through the entrance is rarely changed, whereas the magnitude of the flow velocity of the smaller entrance height is greater than the other ones, which is better for the formation of an SWC swirl flow inside and the flow kinetic energy at the entrance. In cases of installation conditions where a wall is place behind and under SWC, it has been shown that the mass flow rate through the entrance is greater than that in the open condition, and sufficient flow kinetic energy is generated in the entrance for wave power generation. However, the swirl flow kinetic energy is relatively small. Thus, in the future, it is necessary to study the swirl flow generation, which is affected by the SWC shape.

Keywords

References

  1. Cho, Y.J., Kim, M.K., 2007. On the Flushing Effect and the Likelihood of the Environment Friendly Vertical Breakwater Consisting of Immersed Water Channel and Water Chamber as a Wave Energy Extraction Measure. Journal of the Korean Society of Civil Engineers, 27(4B), 441-453.
  2. Dean, R.G., Dalrymple, R.A., 1991. Water Wave Mechanics for Engineers and Scientists. Advanced Series on Ocean Engineering-Volume 2, World Scientific, USA.
  3. Fluent, 2006. User's Guide. ANSYS, Inc.
  4. Gomes, M.N., Olinto, C.R., Rocha, L.A.O., Souza, J.A., Lsoldi, L.A., 2009. Computational Modeling of a Regular Wave Tank. Engenharia Termica(Thermal Engineering), 8(10), 44-55.
  5. Hong, K.Y., Ryu, H.J., Shin, S.H., Hong, S.W., 2004. Wave Energy Distribution at Jeju Sea and Investigation of Optimal Sites for Wave Power Generation. Journal of Ocean Engineering and Technology, 18(6), 8-15.
  6. Josset, C., Clement, A.H., 2007. A Time-domain Numerical Simulator for Oscillating Water Column Wave Power Plants. Renewable Energy, 32, 1379-1402. https://doi.org/10.1016/j.renene.2006.04.016
  7. Kim, S.J., Kwon, J.S., Kim, J.D., Koo, W.C., Shin, S.W., Kim, K.H., 2012. Experimental Study of Hydrodynamic Performance of Backward Bent Duct Buoy (BBDB) Floating Wave Energy Converter. Journal of Ocean Engineering and Technology, 26(6), 53-58 https://doi.org/10.5574/KSOE.2012.26.6.053
  8. Koo, W.C., Kim, M.H., Choi, Y.R., 2010. Numerical Analysis of Chamber Flow and Wave Energy Conversion Efficiency of a Bottom-mounted Oscillating Water Column Wave Power Device. Journal of the Society of Naval Architects of Korea, 47(3), 388-397. https://doi.org/10.3744/SNAK.2010.47.3.388
  9. Koo, W.C., Kwon, J.S., Kim, J.D., Kim, S.J., Kim, M.W., Choi, M.K., 2012. Experimental Study of Shape Parameter of Land-based OWC Wave Energy Converter. Journal of Ocean Engineering and Technology, 26(3), 33-38. https://doi.org/10.5574/KSOE.2012.26.3.033
  10. Nakamura, T., Ohmura, T., Makimoto, K., Ohi, K., 2005. Effective Cross Sections of a Water Exchange Breakwater with Water Chamber by the Use of Wave Induced Vortex Flow. Procceedings of Civil Engineering in the Ocean, JSCE, 21, 541-546.
  11. Song, M.S., Kim, D.Y., Kim, M., Hong, K.Y., Jun, K.C., 2004. Analysis of Wave Energy Density for Korean Coastal Sea Area Based on Long-Term Simulated Wave Data. Journal of the Korean Society for Marine Environmental Engineering, 7(3), 152-157.
  12. KHOA(Korea Hydrographic and Oceanographic Administration), 2011. Report of Real-time Korea Oceanographic Observations 2011. [Online] Available at: [Access 1 Aug. 2012].