Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Efficiency Analysis of a Wave Power Generation System by Using Multibody Dynamics

다물체동역학을 이용한 다자유도 파력발전시스템의 흡수 효율 분석

  • Received : 2015.12.02
  • Accepted : 2016.04.14
  • Published : 2016.06.01
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Abstract

The energy absorption efficiency of a wave power generation system is calculated as the ratio of the wave power to the power of the system. Because absorption efficiency depends on the dynamic behavior of the wave power generation system, a dynamic analysis of the wave power generation system is required to estimate the energy absorption efficiency of the system. In this study, a dynamic analysis of the wave power generation system under wave loads is performed to estimate the energy absorption efficiency. RecurDyn is employed to carry out the dynamic analysis of the system, and the Morison equation is used for the wave load model. According to the results, the lower the wave height and the shorter the period, the higher is the absorption efficiency of the system.

파력발전시스템의 에너지 흡수 효율은 입사파의 파력과 발전기 구동 동력의 비로 정의된다. 흡수 효율은 파력발전시스템의 동적 거동에 의존하기 때문에 파력발전시스템의 에너지 흡수 효율을 예측하기 위해서 파력발전시스템의 동적 해석이 요구된다. 본 논문에서는 에너지 흡수 효율을 예측하기 위하여 파력발전시스템의 동적 해석을 수행하였다. 파력발전시스템의 동적 해석을 위해서 상용 다물체동역학 해석 프로그램인 RecurDyn을 사용하였고, 부유체에 작용하는 파력을 모델링하기 위해서 Morison equation을 적용하였다. 효율분석 결과 파고가 낮고, 주기가 짧을수록 흡수효율이 높아지는 경향을 보인다.

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References

  1. Kim, S G. and Park, R S., 1989, "The Basic Study on Wave Energy Conversion System(II): Estimation on Extracted Wave Power if Wave Energy Conversion Device," Ocean Engineering and Technology, Vol. 2, No. 1. 39-44.
  2. Kim, S G. and Park, M K., 1991, "The Estimation for Extracted Wave Power of an Ocean Wave Energy Conversion Device of the Oscillating Water Column Type," The Korean Society of marine engineering, Vol. 15, No. 3, 213-220.
  3. Hong, D. C. and Hong, K. Y., 2010, "Prediction of Wave Energy Absorption Efficiency and Wave Loads of a Three-Dimensional Bottom-Mounted OWC Wave Power Device," Marine Environmental Engineering, Vol. 13, No. 1, 47-52.
  4. Jang, J. S. and Sohn, J. H., 2011, "Dynamic Analysis of Wave Energy Generation System by Using Multibody Dynamics," Trans. Korean Soc. Mech. Eng. A, Vol. 35, No. 12, 1579-1584. https://doi.org/10.3795/KSME-A.2011.35.12.1579
  5. Kim, D.G., "Dynamics of Structures," Goomibook, Korea, pp. 671-699.
  6. Haritos, N., 2007, "Introduction to the Analysis and Design of Offshore Structures- An Overview," EJSE, Special Issue: Loading on Structures, University of Melbourne, 7, 55-65.
  7. Marine Weather Information Delivery System, http://marine.kma.go.kr/
  8. Weller, S. D., Stallard, T. J. and Stansby, P. K., 2013, "Experimental Measurements of the Complex Motion of a Suspended Axisymmetric Floating Body in Regular and Near-Focused Waves," Applied Ocean Research, Vol. 39, pp. 137-145. https://doi.org/10.1016/j.apor.2012.10.008
  9. Hwang, S. S., 2015, "Development of Moving Body Type Wave Power Generator Using the Wave Horizontal Motions," Doctoral thesis, Graduate School of Chonnam National University, Gwangju.