상호작용과 확산 효과를 이용한 다리우스 유체동력 터빈의 성능 향상
Performance Improvement of a Darrieus Hydrokinetic Turbine by Interaction and Diffusion Effects
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In this study, first, we adopted a twin configuration of a Darrieus hydrokinetic turbines that can bring about an improvement in efficiency through positive interaction and obtained the optimal shape through parametric analysis of the small-scale turbine model by computational fluid dynamic simulations. Next, the effect of performance improvement was examined for symmetrical and asymmetrical ducts. The results show that the asymmetrical duct that utilizes diffusion effects has a comparative advantage in terms of efficiency and drag over the symmetrical one. However, the advantage of the Darrieus turbine, which has flow-directional independency, is lost in the case of the presented configuration; thus, we introduced the idea of a passive yaw-controller that adapts to the variation of the flow-direction that does not require additional energy consumption. In conclusion, such efforts and adjustments to enhance the performance of the Darrieus turbine by utilizing the interaction and diffusion effects discussed in this study will be helpful in securing competitiveness against other types of hydrokinetic turbines.
Abstract
In this study, first, we adopted a twin configuration of a Darrieus hydrokinetic turbines that can bring about an improvement in efficiency through positive interaction and obtained the optimal shape through parametric analysis of the small-scale turbine model by computational fluid dynamic simulations. Next, the effect of performance improvement was examined for symmetrical and asymmetrical ducts. The results show that the asymmetrical duct that utilizes diffusion effects has a comparative advantage in terms of efficiency and drag over the symmetrical one. However, the advantage of the Darrieus turbine, which has flow-directional independency, is lost in the case of the presented configuration; thus, we introduced the idea of a passive yaw-controller that adapts to the variation of the flow-direction that does not require additional energy consumption. In conclusion, such efforts and adjustments to enhance the performance of the Darrieus turbine by utilizing the interaction and diffusion effects discussed in this study will be helpful in securing competitiveness against other types of hydrokinetic turbines.
참고문헌 (18)
- 고진환, "조류발전용 자동확산장치", 국내특허 10-1493457, ~ (2015)
- 고진환, "다리우스 터빈 성능에 대한 가변 형상 블레이드의 영향연구", 해양환경에너지학회 학술지, 22(1), pp.1~7 (2019)
- 김지훈, "다리우스 조류 터빈의 상호작용 효과에 대한 실험적 연구", Ocean Polar Res, 41(3), pp.193~202 (2019)
- 허만웅, "100 kW급 조류발전용 듀얼수직축 터빈의 성능특성 연구", 한국수소및신에너지학회학술지, 31(1), pp.151~159 (2020)
- 허만웅, "다리우스와 사보니우스를 결합한 하이브리드 타입의 조류발전 터빈 설계", 한국유체기계학회 학술지, 24(6), pp.37~46 (2021)
- Amarta Z, "Performance evaluation of vertical axis hydrokinetic turbine(VAHT)helical blade using duct system for low current speed application", IOP Conf Ser : Mater Sci Eng, 1034, pp.012049~ (2021)
- Ambarita EE, "Experimental study on the optimum design of diffuseraugmented horizontal-axis tidal turbine", Clean Energ, 6(5), pp.776~786 (2022)
- Batten WMJ, "Experimentally validated numerical method for the hydrodynamic design of horizontal axis tidal turbines", Ocean Eng, 34(7), pp.1013~1020 (2007)
- Dai YM, "CFD Modelling strategy of a straight-bladed vertical axis marine current turbine", Proceedings of the Twentieth International Offshore and Polar Engineering Conference, pp.767~773 (2010)
- Han SH, "Evaluation of vertical axis turbine characteristics for tidal current power plant based on in situ experiment", Ocean Eng, 65(1), pp.83~89 (2013)
- Huang B, "Design and performance enhancement of a bi-directional counter-rotating type horizontal axis tidal turbine", Ocean Eng, 128, pp.116~123 (2016)
- Khalid SS, "CFD simulation of twin vertical axis tidal turbines system", Int J Res Appl Sci Eng Technol, 5(1), pp.233~238 (2013)
- Kirke BK, "Tests on ducted and bare helical and straight blade Darrieus hydrokinetic turbines", Renew Energ, 36(11), pp.3013~3022 (2011)
- Ko D-H, "Current Policy and technology for tidal current energy in Korea", Energies, 12(9), pp.1807~ (2019)
- Li Y, "Three-dimensional effects and arm effects on modeling a vertical axis tidal current turbine", Renew Energ, 35, pp.2325~2334 (2000)
- Li Y, "Modeling of twin-turbine systems with v e rtical a xis tidal c urre nt t urbine s : P art I-Powe r output", Ocean Eng, 37, pp.627~637 (2000)
- Liu W, "Performance analysis and offshore applications of the diffuser augmented tidal turbines", Sh Offshore Struct, 18(1), pp.68~77 (2023)
- Runge S, "Technology readiness of a vertical-axis hydro-kinetic turbine", J Power Energ Eng, 6, pp.63~85 (2018)