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Vehicle Motion Energy Harvester

Team HI-Five from the University of portland designed, fabricated and tested an energy generating speed bump

Kainoa Gaddis

on 21 April 2013

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Transcript of Vehicle Motion Energy Harvester

Problem statement
Design Decision
Concept Prototype
Final Prototype
Next Steps Vehicle Motion
Energy Harvester Kainoa Gaddis,Warren Ching, David Ogata, Sean Fujiyoshi, Kevin Kadooka Jacob Amos – Mechanical Technician
Dr. Tim Doughty – Faculty Advisor
Tim Scheumann – Industrial Advisor
Allen Hansen – Technician Supervisor
Dean’s Office – Additional Funding
IRC Aluminum – Material Donations
ME Faculty Acknowledgements Overview
Improve efficiency (currently ~5% of ideal)
Use DC generator instead of salvaged DC scooter motor
Custom gearbox with optimized gear ratio

Improve useability
Compact frame and size
Built in ramp

Investigate feasibility
100K Challenge Next Steps Testing Final Prototype Concept Prototype
Converts vertical motion to rotational motion to drive an electric generator
Final product will be a fully functional prototype
VMEH is scaled in length to one wheel to stay within budget Design Decision The objective of this project was to design, fabricate, and test a Vehicle Motion Energy Harvesting device (VMEH). Objectives Speed bumps are used to slow down traffic

When vehicles pass over speed bumps energy is wasted and lost as vibrations, noise, heat, etc.

This wasted energy can be harvested most efficiently in high traffic, low speed areas
Parking lots/garages
Gas stations
Toll booths

Traffic Signals
Parking Lights
Offset building energy costs
Stored in battery for future use Problem Future Past Results Frame and Linkages Drivetrain Issues Fabrication Questions? Design Iterations Fabrication Piezoelectric Mechanical Hydraulic High cost
Estimated low power output High cost
Higher complexity Lower cost
Best power output potential
Simplicity Results, Continued Effects of Flywheel Inertia Miniature Wood Mockup Full-Size Wood Mockup The Decision: Proof of concept Steel frame
Validate dimensions
Spring hinge Final Prototype Finalized design
Used aluminum for its light weight Miniature Wood Mockup Established drivetrain concept Full-Size Wooden Gearbox Pulley system
Verified dimensions of gearbox, belt tensions Full Scale Drivetrain Final Drivetrain Improved durability with metal pulleys Criteria for success
Vehicle must be able to drive over in both directions
Must have easily removable and repairable parts
Must stay within budget
Generate measurable amount of power Conclusions All criteria met
Stayed within $1200 budget
Created a functional device that car drives over
Device was easily repaired multiple times
Produced a measurable amount of electrical power Design Iterations Plastic pulleys
Metal components Economic Feasibility Payoff: ~$0.02/month assuming 1000 cars per day
There is significant room for improvement - efficiently is currently only 5% of ideal
Cost of device is similar to a stationary speed bump
Energy harvesting concept can be applied to other applications, like vehicle suspensions, pedestrian walkways, etc. Load Optimization A particular electrical load optimizes the power output of a system

Rheostats were used to apply variable loads to the VMEH

3 Ohm load maximizes the power output Business plan competition

Plan to make a company to further develop this idea and explore market research

Explore mass production and manufacturing costs

Potential senior design project for rising underclassmen to further develop design 100K Challenge
Full transcript