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Renewable Energy Designs

Proposal PresentationDecember 1, 2003

Renewable Commuter Carwww.cet.nau.edu/~pdd3/solar

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Renewable Energy Designs

Krystle Bobby Dave Justin Elliott

Rubino Olsen Dufek Smith Rector

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Overview

We are working in conjunction with our sponsor to develop a proof-of-concept for a sustainable renewable energy commuter vehicle.

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Sponsor

Novakinetics

Jim Corning

•MSME from MIT

•Composite Materials

•Aerospace and

Optics

•Solar Commuter Vehicle

Faculty Advisor: Dr. Albert Gossler

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Problem Statement

Develop a proof-of-concept for a stand-alone commuter vehicle that will be used for the purpose of traveling to work for a range of 15 miles per day in typical Flagstaff environmental and road conditions that will be completely sustainable from renewable energies.

Project Description

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Project Requirements

• Energy Collection– Collect enough to drive 15 miles/day– 80-100 ft2 solar cells– Exert enough energy to drive in typical

Flagstaff Conditions• Energy Storage

– Store enough to operate for 3 days– Self Sustaining

• Energy Expenditures– Maintain 40 mph– Acceleration bursts to 70 mph– Maintain speed limit up Cedar Hill

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Project Specifications

• Flagstaff, Arizona road and environmental conditions

• Vehicle fits into one standard parking space (9’x18’)

• Completely sustainable from renewable energies (3 days)

• Ergonomics, accessories, manufacturing, safety, aerodynamics, and ease of operation

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Project Deliverables

• 3-D CAD modeling of sub-systems and final assembly of sub-systems

• Performance Analysis– Computational Fluid Dynamics (CFD)– Weight– Efficiency– Finite Element Analysis (FEA)

• Sub-system prototypes (real or virtual)

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Gantt Chart

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Milestones

Fall 2003• 11/3 Webpage • 12/1 Proposal Document/Presentation• 12/31 Finished Design of 2 sub-systems

Spring 2004• 2/23 Final Design of sub-systems• 4/12 Final Design Document• 4/23 Conference Presentation

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Deployable Array

• Possible $3,500 for proposed 100 ft²

• Could weigh in around 200 lbs• Less than 1” thick• Power- Rated at over 1 kW

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Motor / Drive System

• DC Brushless Motor ( 30-40 HP)• Continuously Variable Transmission

(CVT)• High Efficiency (95%)• Motor cost around $1,000

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Suspension

• Front Suspension– Trailing Arms

• Simple• More space for

regenerative braking system

• Independent

• Rear Suspension– Swing Arm

• Simple• Narrow for vehicle

aerodynamics

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Storage System

• Batteries– Nickel Metal

Hydride (NiMH)– Reliable– Heavy– Available

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Frame

www.wsc.org.au/solarcars.htm

• Tubular steel design – Carbon/Chromoly steel – Understand material

properties – Simple to form/weld

• Needs to support about 1,200 lbs– Majority of weight is from

Batteries• Provide base for

aerodynamic composite shell

• Budget $520 for materials

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Aerodynamics

• Three types of drag– Induced Drag

• Pressure gradient from a nonsymmetrical design

– Pressure Drag• Boundary layer separation• Accounts for most of drag force

– Skin Friction Drag• Rubbing of fluid occurs on any

design• Minimal drag force at city

driving speeds

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Ergonomics

• Heater– Efficient Heat pump

• Stereo– 15 watt cd player

• Chair– Plastic with cover

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Ergonomics, Cont.

• Heater– Uses heat pump

cycle– Can be reversed

to use as an air conditioner

– Basically pumps heat from the cold air into the inside air of the vehicle

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Steering

• Basic rack and pinion setup– Torque input from driver– No power steering needed due

to the weight of the vehicle

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Regenerative Brakes

• Magnetic Brakes– Create opposing

magnetic fields to resist motion

– Recaptures momentum as electrical energy

– Recharges and extends driving range of batteries

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Sources

• http://www.sunraycer.com• “Electric Driving Support.” Continental

Temic• “Regenerative Braking” 10 Oct 2003

http://www.ctts.nrel.gov/analysis/advisor_doc/regen.htm

• http://www.brinkdynamics.nl/technical/dvc.html

• “Lighter, Smaller, Stronger”.Automotive Engineer. 07/2001, Vol. 26 Iss 6 p16

State of the Art Research

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Overall Team Hours

•307.5 Total Project Hours

•180 Team Hours

Overall Team Hours

Dave9%

Bobby7%

Elliott6%

Krystle13%

Justin6%

Team59%

Dave Bobby Elliott Krystle Justin Team

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Project Hours

Project Hours

9%

7%

5%

7%

3%

10%

5%7%

17%

30%

SOTA Brainstorming Documentation Mtgs. w / Jim Project Notebook Website Develop.

Sub-systems Presentation Proposal Decision Matrices

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Budget

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Conclusion

In conclusion, we have built a good base of research and client contact that will help us achieve a successful project, and look forward to sharing our progress throughout the year.

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Future Plans

• Keep in close contact with Jim Corning• Continue to refine sub-system designs• More SOTA research• Complete two sub-system designs by Dec.

31• Solid modeling of sub-systems• Related analyses for sub-systems

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Any questions?

Questions