저낙차에서 와류발생부를 구비한 마이크로 소수력에 관한 실험 연구
Experimental Study of Micro hydropower with Vortex Generation at Lower Head Water
0
조회
0
다운로드
6
인용
0
참고문헌
키워드
초록
본 논문은 자유수면을 가지는 와류유동 내 저낙차에서 마이크로 소수력에 관한 실험 연구이다. 내부 곡선 모서리가 있는 직선, 곡선, 비틀린 블레이드의 와류 높이, 터빈 회전 및 토크를 개수로 유입구의 유량 0.0069 m3/s 조건에서 측정하였다. 실험결과로서 최적의 와류 강도는 와류 발생부의 외부직경과 유출구 직경 비율 0.17∼18.5 범위에서 발생했다. 직선 블레이드 출력과효율은 다른 블레이드와 비교하여 높게 나타났다. 가장 높게 생성된 에너지는 12.33 W이고, 토크는 0.91 N·m이다. 유효낙차를 고려한 경우 가장 높은 효율은 29.5 %인 반면 와류 높이를 고려한 가장 높은 효율은 회전수 132 rpm에서 80.5 %이다. 직선 블레이드의 와류 유속은 개수로 유입구의 평균 유속보다 약 2.8배 더 크게 나타난다.
Abstract
This paper described a laboratory investigation of micro hydropower at lower head water in a free vortex flow. The vortex height, turbine rotation and torque for straight blade with inner curved edge, twisted blade and curved blade were investigated at the flow rate of 0.0069 m3/s in the inlet channel. The results showed that the optimum vortex strength occurred within the range of the diameter of basin to the outlet diameter ratios of 0.17∼18.5. The power output and efficiency of straight blade were higher as compared to other blades. The highest amount of generated energy was 12.33 W, the torque was 0.91 N·m and the highest efficiency by considering effective head was 29.5 %, whereas the highest efficiency by considering vortex height was 80.5 % at the rotational speed of 132 rpm. The water vortex velocity of straight blade was about 2.8 times larger than the mean velocity in the inlet channel.
참고문헌 (20)
- Dhakal, R, "Computational and experimental investigation of runner for gravitational water vortex power plant", 2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA), 373, pp.363~ (2017)
- Drioli, C, "Esperienze su installazioni con pozzo di scarico a vortice", L’Energia Elettrica, 66(6), pp.399~409 (1969)
- Gheorghe-Marius, M, "Energy capture in the gravitational vortex water flow", J. of Marine Technology & Environment, 1 (2013)
- Grote, KH, "Dubbel Taschenbuch für den Maschinenbau. 21" (2005), Auflage Springer Verlag Berlin Heidelberg
- Hager, WH, "Head-discharge relation for vortex shaft", J. of Hydraulic engineering, 111(6), pp.1015~1020 (1985)[DOI]
- Kleinschroth, A, "Stroemungsvoegange im Wirbelfallschacht", Mitteilung des Institutes fuer Hydraulik und Gewaesserkunde, ~ (1972)
- Mohanan, A, "Power Generation with Simultaneous Aeration using a Gravity Vortex Turbine", International J. of Scientific & Engineering Research, 7(2), pp.19~24 (2016)
- Mulligan, S, "The Hydraulic Design and Optimisation of a Free Water Vortex for the Purpose of Power Extraction. Final Year Civil Engineering Project", Institute of Technology Sligo, ~ (2010)
- Mulligan, S, "Hydrodynamic investigation of free-surface turbulent vortex flows with strong circulation in a vortex chamber", Proceedings of the 5th IAHR International Junior Workshop on Hydraulic Structures (2014)
- Odgaard, AJ, "Free-surface air core vortex", J. of Hydraulic Engineering, 112(7), pp.610~620 (1986)[DOI]
- Petrasch, K, "Fischwanderhilfe zur Überwindung unterschiedlich hoher Wasserlinien zwischen Wasserzulauf und Wasserablauf an künstlichen Wasserstauwerken", Germany, Patent DE102009026000A1, ~ (2009)
- Power, C, "A parametric experimental investigation of the operating conditions of gravitational vortex hydropower(GVHP)", J. of Clean Energy Technologies, 4(2), pp.112~119 (2016)[DOI]
- "Kleinwasserkraftwerk mit Gravitationswirbel. BWK -Das Energie-Fachmagazin 3-2012, Seite 18-21" (2012)[URL]
- Shabara, HM, "CFD Simulation of Water Gravitation Vortex Pool Flow for Mini Hydropower Plants", J. Teknologi, 74(5), pp.77~81 (2015)[DOI]
- Singh, P, "Experimental optimization of a free vortex propeller runner for micro hydro application", Experimental Thermal and Fluid Science, 33(6), pp.991~1002 (2009)[DOI]
- Wanchat, S, "Preliminary Design of a Vortex Pool for Electrical Generation", J. of Computational and Theoretical Nanoscience, 13(1), pp.173~177 (2012)[DOI]
- Wardhana, EM, "Analysis of Gottingen 428 Airfoil Turbine Propeller Design with Computational Fluid Dynamics Method on Gravitational Water Vortex Power Plant", International J. of Marine Engineering Innovation and Research, 3(3), pp.69~77 (2019)[DOI]
- Yaakob, OB, "A Review on Micro Hydro Gravitational Vortex Power and Turbine Systems", J. Teknologi, 69(7), pp.1~7 (2014)[DOI]
- Zotloeterer, F, "Hydroelectric power plant", Patent WO 2004, 2004
- Zotloeterer, F, "Das Gravitationswasserwirbelkraftwerk. Zement und Beton 3", 11, Zement + Beton Handels-u. Werbeges.m.b.H., 2011