Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
권호 표지
DOI QR코드

DOI QR Code

Study on Performance of Vertical-axis Tidal Turbines Applied to the Discharged Channel of Power Plant

조류발전용 수직축 터빈의 방수로 설치에 따른 성능에 관한 연구

  • Lee, Jeong-Ki (Div. of Naval Architecture & Ocean Systems Engineering, Korea Maritime & Ocean University) ;
  • Hyun, Beom-Soo (Div. of Naval Architecture & Ocean Systems Engineering, Korea Maritime & Ocean University)
  • 이정기 (한국해양대학교 조선해양시스템공학부) ;
  • 현범수 (한국해양대학교 조선해양시스템공학부)
  • Received : 2015.07.16
  • Accepted : 2015.10.26
  • Published : 2015.11.25
Download PDF
⟨ Previous Next ⟩

Abstract

Thermal and nuclear power plants on shore commonly use the sea water for cooling facility. Discharged cooling water has the high kinematic energy potential due to amount of water flux. Numerical analysis was made to find the suitable combinations between the arrangement of tidal turbines and the overall dimensions of the discharged channel. Several parameters such as the turbine diameter to inlet size, and the axial distance to turbine size were investigated. Power coefficients for various test conditions were also compared to see the effect of inlet configurations such as single inlet and dual inlet. For the single inlet, the mean power coefficient appeared to be gradually decreased with increasing distance, and the maximum power was obtained when the turbine diameter was same as the inlet diameter. For the dual inlet, the tendency was similar so that the better result when the turbine diameter was same as the inlet diameter. It is expected that the present methodology can be extensively utilized to harness the high kinetic energy flow of the discharge channel of power plant.

국내 연안에 위치해 있는 화력 및 원자력 발전소는 발전시설 냉각을 위해 해수를 사용한다. 입구를 통해 배출되는 온배수는 유량이 상당하여 입구 근처에 큰 운동에너지가 존재한다. 이러한 제한된 입구에서 빠른 흐름이 존재하는 제트류 영역에 설치된 수직축 터빈의 성능을 수치적으로 조사하였다. 제트류 영역에서 입구와 터빈간 거리, 입구 직경과 수직축 터빈의 직경에 따른 성능 변화를 TSR=3.0에서 조사하였다. 또한, 입구가 1개인 경우와 2개인 경우에 대해 직경이 다른 터빈을 배치하여 성능 및 발전량을 비교하였다. 입구가 1개인 경우 입구로부터 터빈과의 거리가 증가함에 따라 터빈 효율이 감소함을 알 수 있었고, 터빈 직경과 입구 직경이 동일할 때 효율이 가장 좋은 것을 알 수 있었다. 입구가 2개인 경우는 효율 및 총 발전량을 고려하여 입구와 동일한 크기의 터빈을 각각 배치하는 것이 좋은 것을 확인하였다. 본 연구는 방수로 입구 전방에 설치된 수직축 터빈을 개념적으로 설계하는데 활용될 수 있을 것으로 기대된다.

Keywords

References

  1. Fox, R.W. and Mcdolad, A.T., 1994, Introduction to Fluid Mechanics, 4th edn., Wiley.
  2. Gareth, I.G., 2009, "The hydrodynamic analysis of a vertical axis tidal current turbine", Thesis for the degree of doctor philosophy, The University of Edinburgh.
  3. George, N.F., 1963, "Some entrainment properties of a turbulent axi-symmetric jet", Research report, The Aerophysics Department Mississippi State University.
  4. Hussein, J.H. et al., 1994, "Velocity measurements in a high- Reynolds-number, momentum- conserving, axisymmetric, turbulent jet", J. Fluid Mech., Vol. 258, 31-75. https://doi.org/10.1017/S002211209400323X
  5. Hyun, B.S. and Lee, J.K., 2013, "Hydrodynamic aspects on three-dimensional effects of vertical-axis tidal stream turbine", J. of the Korean Society for Marine Environment and Energy, Vol.16, No.2, 61-70. https://doi.org/10.7846/JKOSMEE.2013.16.2.61
  6. Hyun, B.S. et al., 2012, "Tidal Stream Energy Research", Final report, Tidal Stream Energy Research Center.
  7. Jung, D.H. et al., 2004, "Down stream evolution of the most energetic modes in a turbulent axismmetric jet at high Reynolds number. Part 1. The near-field region", J. Fluid Mech., Vol.514, 173-204. https://doi.org/10.1017/S0022112004000163
  8. Kang, K.S. et al., 2007, "Installation of pilot plant and troubleshootings of horizontally linked helical turbines with unconfined free flow condition in artificial channel", Proc. of The Korean Society for New and Renewable Energy, 626-629.
  9. Kim, J.Y. and Kang, K.S., 2008, "Analysis of impact on the circulating water system due to installation of low-head stream turbine at the discharge channel of the power plant", Proc. of Korea Water Resources Association.
  10. Kwon, S.J. and Seo, I.W., 2005, "Reynolds number effects on the behavior of a non-buoyant round jet", Experiments in fluids, Vol. 38, 801-812. https://doi.org/10.1007/s00348-005-0976-6
  11. Li, Y. and Calisal, M.S., 2010, "Modeling of twin-turbine systems with vertical axis tidal current turbines: Part I-Power output", Ocean Engineering, Vol.37, 627-637. https://doi.org/10.1016/j.oceaneng.2010.01.006
  12. MTIE Notification, 2014, "Guidelines of management and operation manual of the renewable portfolio standard", #2014-30, Ministry of Trade, Industry and Energy (MTIE).
  13. Song, M.S. et al., 2014, "Study on investigation of potential marine energy associated with nuclear power plant", Final report, The Korean Society for Marine Environment and Energy.
  14. Walter, T., 1926, "Calculation of turbulent expansion processes", Technical memorandum, National Advisory Committee for Aeronautics.
  15. Xu, G. and Antonia, R.A., 2002, "Effect of different initial conditions on a turbulent round free jet", Experiments in Fluid, Vol.33, 677-683. https://doi.org/10.1007/s00348-002-0523-7