일점 계류식 조류발전 덕트의 디퓨져 각도변화에 따른 내부 유동 분석
Flow Characteristics inside the Duct with Various Diffuser Angles for the Single Point Moored TCP System
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참고문헌
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초록
With many countries implementing carbon dioxide reducing policy recently, the demand of green energy has been increased. Tidal current power, one of the ocean energy resources, has great potential worldwide due to its high energy density. Since the kinetic energy of the flow at the upstream is proportional to the cube of the velocity, the flow speed is the most critical factor for power generation affecting on the performance of the system. A duct system can accelerate the flow velocity, which could expand the applicable area of TCP systems to relatively lower velocity sites. The shapes of the inlet and outlet could affect the flow rate inside the duct. To investigate the performance of the duct, variable ducts were preliminary designed and a series of simulations were carried out using ANSYS-CFX v13.0 CFD software. This study introduces a ducted turbine system that can be moored to a seabed. A performance estimation and comparison of results with conventional tidal converters were summarized in this paper.
Abstract
With many countries implementing carbon dioxide reducing policy recently, the demand of green energy has been increased. Tidal current power, one of the ocean energy resources, has great potential worldwide due to its high energy density. Since the kinetic energy of the flow at the upstream is proportional to the cube of the velocity, the flow speed is the most critical factor for power generation affecting on the performance of the system. A duct system can accelerate the flow velocity, which could expand the applicable area of TCP systems to relatively lower velocity sites. The shapes of the inlet and outlet could affect the flow rate inside the duct. To investigate the performance of the duct, variable ducts were preliminary designed and a series of simulations were carried out using ANSYS-CFX v13.0 CFD software. This study introduces a ducted turbine system that can be moored to a seabed. A performance estimation and comparison of results with conventional tidal converters were summarized in this paper.
참고문헌 (5)
- C. H. Jo, "Performance Evaluation of TCP Device with Upstream Duct Installation", The Korean Association of Ocean Science and Technology Societies Conference, pp, pp.77~80 (2009)
- Palapum khunthongjan, "An investigation of diffuser for water current turbine application using CFD", International Journal of Engineering Science and Technology, 3, pp.3437~3445 (2011)
- Jong Won Kim, "A study on flow characteristic variations of tidal current generation turbine with shroud geometry", The Korean Association of Ocean Science and Technology Societies Conference, pp.1853~1856 (2012)
- R. Luquet, "Design and model testing of an optimized ducted marine current turbine", International Journal of Marine Energy, 2, pp.61~80 (2013)
- Domenico P. Coiro, "Diffuser shape optimization for GEM, a tethered system based on two horizontal axis hydro turbines” “Developments in ducted water current turbines”", Grand Renewable Energy 2014 (2014)