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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29311

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Investigation on a Wave-Powered Electrical Generator Consisted of a Geared Motor-Generator Housed by a Double-Cone Rolling on Concentric Circular Rails
An electrical generator able to harness energy from the water waves and designed as a double-cone geared motor-generator (DCGMG), is proposed and theoretically investigated. Similar to a differential gear mechanism, used in the transmission system of the auto vehicle wheels, an angular speed differential is created between the cones rolling on two concentric circular rails. Water wave acting on the floating DCGMG produces and a gear-box amplifies the speed differential to gain sufficient torque for power generation. A model that allows computation of the speed differential, torque, and power of the DCGMG is suggested. Influence of various parameters, regarding the construction of the DCGMG, as well as the contact between the double-cone and rails, on the electro-mechanical output, is emphasized. Results obtained indicate that the generated electrical power can be increased by augmenting the mass of the double-cone, the span of the rails, the apex angle of the cones, the friction between cones and rails, the amplification factor of the gear-box, and the efficiency of the motor-generator. Such findings are useful to formulate a design methodology for the proposed wave-powered generator.
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[1] B. Drew, A. R. Plummer, and M. N. Sahinkaya, “A Review of Wave Energy Converter Technology,” Journal of Power and Energy, 223, pp. 887–902, 2009.
[2] R. Kempener, and F. Neumann, Wave Energy Technology. Abu Dhabi: International Renewable Energy Agency, 2004, pp. 1–28.
[3] J. Twidell, and T. Weir, Renewable Energy Sources. New York: Taylor & Francis, 2006, pp. 400–429.
[4] P. Meisen, and A. Loiseau, Ocean Energy Technologies for Renewable Energy Generation. San Diego: Global Energy Network Institute, 2009, pp. 1–27.
[5] R. Waters, Energy from Ocean Waves. Uppsala University: PhD Thesis, 2008, pp. 1–132.
[6] A. S. Kumar, “Simple and Nonstop Buoyant Arm Wave Energy Converter,” International Journal of Innovative Research & Development, 3(10), pp. 180–183, 2014.
[7] H. K. Sachs, and G. A. Sachs, “Mechanism for Generating Power from Wave Motion on a Body of Water,” US Patent, 4,352,023, pp. 1–16, 1982.
[8] V. Orlando, “System for Generating Electrical Energy from Sea Waves,” US Patent, 239,643, pp. 1–15, 2014.
[9] G. Bracco, E. Giorcelli, and G. Mattiazzo, “Performance Assessment of a 2DOF Gyroscopic Wave Energy Converter,” Journal of Theoretical and Applied Mechanics, 53, pp. 195–207, 2015.
[10] H. Kanki, “Gyro Wave Activated Power Generator and a Wave Suppressor using the Power Generator,” US Patent, 7,003,947, pp. 1–11, 2006.
[11] B. Suciu, “Solution to the Problem of Contact between a Double-Cone and Two Eccentric Circular Rails used in the Construction of a Wave-Powered Electrical Generator,” Transactions of the JSME, 83(853), pp. 17.00093.1–12, 2017 (in Japanese).
[12] A. A. Gallitto, and E. Fiordilino, “The Double Cone: A Mechanical Paradox or a Geometrical Constraint?,” Physics Education, 46, pp. 682–684, 2011.
[13] S. C. Gandhi, and C. J. Efthimiou, “The Ascending Double-Cone: A Closer Look at a Familiar Demonstration,” European Journal of Physics, 26, pp. 681–697, 2005.
[14] B. Suciu, “On the Kinematics of a Double-Cone Gravitational Motor,” International Journal of Science and Engineering Investigations, 5(53), pp. 1–7, 2016.
[15] B. Suciu, “Frictional Effects on the Dynamics of a Truncated Double- Cone Gravitational Motor, International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering, 11(1), pp. 28–38, 2017.
[16] N. Balta, “New Versions of the Rolling Double Cone,” Physics Teacher, 40, pp. 156–157, 2002.
[17] H. A. Rothbart, Mechanical Design and Systems Handbook. New York: McGraw-Hill, 1985, pp. 7–173.
[18] R. C. Juvinall, and K. M. Marshek, Fundamentals of Machine Component Design. London: John Willey & Sons, 2006, pp. 1–769.
[19] J. A. Stratton, Electromagnetic Theory. London: McGraw-Hill, 1941, pp. 185–222.
[20] K. M. Rao, Elements of Electrical Engineering. New Delhi: I.K. International Publishing, 2015, pp. 1–227.
[21] A. Pramanik, Electromagnetism. New Delhi: PHI Learning, 2014, pp. 12–621.
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