Session: VIB-10-02

Paper Number: 139050

139050 - Dynamic Modeling, Simulation, and Experimental Validation of the Power Take-Off Mechanism of an Oscillating Hydrofoil-Based Hydrokinetic Energy Converter 

The study introduces the dynamic analysis of the Power Take-Off (PTO) mechanism of a Bio-Inspired Renewable Energy (BIRE) device aimed at revolutionizing riverine power generation. Drawing from fish swimming dynamics, an oscillating hydrofoil is utilized to harvest energy, which is then converted via a Mechanical Motion Rectifier (MMR). This innovative PTO mechanism transmutes oscillatory motion into unidirectional rotation, ensuring high conversion efficiency. The Ball Screw-based MMR PTO was comprehensively examined using dry lab tests on the INSTRON Machine. The model’s validation showed a commendable match with experimental data, with a primary focus on capturing frictional behaviors. Crucial findings indicated the prominence of dry friction, attributed to possible gear misalignments, which, when addressed, can significantly bolster the system’s mechanical efficiency. At an optimal load of 1 Ω, the PTO achieved an efficiency of 75%. Additionally, the distinct orientation of the Force vs. Displacement loop sheds light on inherent system dynamics, suggesting avenues for future refinements. Furthermore, a comparative study between the two different PTO mechanisms is performed to help the developers make informative decisions about choosing the suitable PTO for a particular marine hydrokinetic energy harvester. This research lays the groundwork for a highly efficient and adaptable mechanism designed for harnessing riverine hydrokinetics.

Presenting Author: Vishnu Vijayasankar University of Michigan

Presenting Author Biography: I'm a Ph.D. candidate at the University of Michigan, specializing in Marine Renewable Energy with a focus on integrating engineering, socioenvironmental, and economic factors for the benefit of remote communities. Under the mentorship of Dr. Lei Zuo, I've led significant projects like the development and testing of a 1kW Hydrokinetic Energy Harvester, supported by ARPA-E funding. My work emphasizes sustainable, community-driven energy solutions, demonstrated through active engagement with communities like Beaver Island and achievements in competitions such as the Marine Energy Collegiate Competition.

Authors:

Vishnu Vijayasankar University of Michigan
Joseph Zhu University of Virginia
Hilary Bart-Smith University of Virginia
Lei Zuo University of Michigan