Semi-analytical solution of optimization on moon-pool shaped WEC

• Autorzy: Zhang W. C. , Liu H. X. , Zhang X. W. , Zhang L.
• Języki publikacji: EN

Abstrakty

EN

In order to effectively extract and maximize the energy from ocean waves, a new kind of oscillating-body WEC (wave energy converter) with moon pool has been put forward. The main emphasis in this paper is placed on inserting the damping into the equation of heaving motion applied for a complex wave energy converter and expressions for velocity potential added mass, damping coefficients associated with exciting forces were derived by using eigenfunction expansion matching method. By using surface-wave hydrodynamics, the exact theoretical conditions were solved to allow the maximum energy to be absorbed from regular waves. To optimize the ability of the wave energy conversion, oscillating system models under different radius-ratios are calculated and comparatively analyzed. Numerical calculations indicated that the capture width reaches the maximum in the vicinity of the natural frequency and the new kind of oscillating-body WEC has a positive ability of wave energy conversion.

Słowa kluczowe

EN

wave energy; eigenfunction expansion; moon pool; conversion ability; optimization

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2016
• Tom: S 1
• Strony: 25--31
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Zhang W. C.

• College of Shipbuilding Engineering, Harbin Engineering University, Harbin,China

autor

Liu H. X.

• College of Shipbuilding Engineering, Harbin Engineering University, Harbin,China

autor

Zhang X. W.

• College of Shipbuilding Engineering, Harbin Engineering University, Harbin,China

autor

Zhang L.

• College of Shipbuilding Engineering, Harbin Engineering University, Harbin,China

Bibliografia

• 1. Budal K, Falnes J, Iversen LC, Lillebekken PM, Oltedal G, Hals, et al. (1982) The Norwegian wave-power buoy project. In: Proceedings of 2nd International Symposium on Wave Energy Utilization, Trondheim, Norway, 323-44.
• 2. Chen XB, Liu HX, Duan WY (2015) Semi-analytical solutions to wave diffraction of cylindrical structures with a moon pool with a restricted entrance. Journal of Engineering Mathematics, 90(1), 51-66.
• 3. Eriksson M, Isberg J, Leijon M (2005) Hydrodynamic modeling of a direct drive wave energy converter. Int. J. Eng. Sci., 43: 1377C1387.
• 4. Falcao AFO (2007) Modeling and control of oscillatingbody wave energy converters with hydraulic power takeoff and gas accumulator. Ocean Engineering, 34(14-15), 2021-2032.
• 5. Garrett CJR (1971) Waves forces on a circular dock. J. Fluid Mech. 46, 129-39.
• 6. Henderson, R (2006) Design, simulation, and testing of a novel hydraulic power take-off system for the Pelamis wave energy converter. Renewable Energy, 31(2), 271-283.
• 7. Liu HX, Duan WY, Chen XB (2012) Analytical solution of wave loads on cylindrical structures. Proc. ICMT2012, Harbin (China).
• 8. MacCamy RC, Fuchs RA (1954) Wave forces on piles: a diffraction theory. US Army Corps of Engineers, Beach Erosion Board Tech. Memo. No. 69.
• 9. Margheritini L, Vicinanza D, Frigaard P (2009) SSG wave energy converter: design, reliability and hydraulic performance of an innovative overtopping device. Renewable Energy, 34(5), 1371-1380.
• 10. Mavrakos SA, Chatjigeorgiou IK (2006) Second-order diffraction by a bottom-seated compound cylinder. Journal of Fluids and Structures 463-492.
• 11. Miles JW, Gilbert JF (1968) Scattering of gravity waves by a circular dock. J. Fluid Mech. 34, 783-793.
• 12. Price AAE, Dent CJ, Wallace AR (2015) On the capture width of wave energy converters. Applied Ocean Research, 31(4), 251-259.
• 13. Weinstein A, Fredrikson G, Parks MJ, Nielsen K (2004) Aqua-BUOY: the off-shore wave energy converter numerical modeling and optimization In: Proceedings of MTTS/IEEE Techno-Ocean., 04, 1854C1859, Kobe, Japan.
• 14. Almar, R; Almeida, P; Blenkinsopp, C; Catalan (2016), P. Surf-Swash Interactions on a Low-Tide Terraced Beach. Journal of Coastal Research. SI 75, 348-352.
• 15. Wu BJ, Lin HJ, You YG, Feng B, Sheng SW (2010) Study on two optimization methods of oscillating wave energy conversion device. Acta Energiae Solaris Sinica, 31(6), 769774, Chinese.
• 16. Yeung RW, Peiffer A, Tom N (2012) Design, analysis and evaluation of the UC-Berkeley wave-energy extractor. J. Offshore Mech. Arct., 134(2): 02190