Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye...
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![Page 1: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/1.jpg)
Pedal PurificationUniversity of Notre DameSenior Design Group A6November 28, 2006
Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell Tim Rodts
![Page 2: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/2.jpg)
Objective
• 2006 ASME Design Competition requirements:– Allow user to convert 200 mL of ‘polluted’ water into pure
drinking water within one hour. – Compact, collapsible, transportable design.
• Group Requirements:– Robustness - adaptable as power source for emergency
applications. – Collapsible – components housed underneath user’s seat when
not in operation.
![Page 3: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/3.jpg)
The Concept
Pedals and
Gears
Generator Heating Condensing
![Page 4: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/4.jpg)
Pedals and Gears
Pedals and
Gears
Generator Heating Condensing
Considerations: • User comfort (height adjustment with angle-iron)
• Sustainable user RPM• Optimum gear configuration
![Page 5: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/5.jpg)
Generator
Pedals and
Gears
Generator Heating Condensing
Considerations:
• Sprocket mount to 5/16” generator shaft
-fitted sleeve and set-screw• Exposed wire
-wire caps• Connection to alternative power sources
-fitted to female plug•Firm mounting to base
-L-brackets mounted to wood base
![Page 6: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/6.jpg)
Heating and Condensing
Pedals and
Gears
Generator Heating Condensing
![Page 7: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/7.jpg)
Packaging
Pedals and
Gears
Generator Heating Condensing
Packaging
Compact
Expanded
![Page 8: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/8.jpg)
Packaging
Pedals and
Gears
Generator Heating Condensing
Packaging
Features:
•Collapsible chair back•Fold-up angle-iron supports•All components housed underneath chair on stationary base
Concept
Realization
![Page 9: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/9.jpg)
FEASIBILITY ISSUES
![Page 10: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/10.jpg)
Feasibility Issue #1: Energy Requirements
Pavailable = 150 W
Eavailable= (150 W)(3600 s)
= 540 kJ
Erequired = ρcVΔT +mhfg
= 523 kJ
Question: Can a bicycle pedal system provide enough energy to boil 200 mL water in 1 hour?
Answer: YES – at 100% efficiency!
![Page 11: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/11.jpg)
Feasibility Issue #2: Pressure Reduction
Erequired = Eheat +Evaporize + Evacuum
Emax = 523 kJ
Emin = 510 kJ
Question: Would a pressure reduction system be feasible for energy savings, since water boils at lower temperatures under lower pressures?
Answer: Energy savings are minimal, hence pressure reduction is infeasible.
![Page 12: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/12.jpg)
Feasibility Issue #3: Maximizing Gear Ratio
• Question: How can generator power output be fully utilized?
• Generator: maximum 5,000 rpm at GR = 55.7
• Obtained: 460 rpm at GR = 5.13– Yields ≈ 3.0 W
• Result: Need 3 sets of sprockets (ratios shown below) to maximize generator power output.
• Deemed infeasible for prototype due to cost issues related to purchasing/mounting sprockets
• Answer: For final design,
increase gear ratio!
![Page 13: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/13.jpg)
TECHNICAL ISSUES
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Technical Issue #1: Generator Shaft/Sprocket Connection
• Generator can handle radial load, verified by supplier.• Sprocket with set-screw in hub necessary.• For ANSI Chain #35, minimum
½” bore diameter, generator
has 5/16” shaft.
• Solution: fashion sleeve
in sprocket/hub to
match shaft diameter.
![Page 15: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/15.jpg)
Technical Issue #2: Compact Packaging
• Solution: CAD model to verify location/ orientation of components. – 21” x 25.5” between
chair legs– Condensing unit
– Removable Base
• In disassembled state, all components must be housed underneath chair to meet ASME requirements.– Maximum girth = 165”
– Prototype girth = 135”
![Page 16: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/16.jpg)
Technical Issue #2: Compact Packaging
21”
11”
6”
11.8”25.4”
20”28
”
![Page 17: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/17.jpg)
Technical Issue #3: Material Selection
• Material Requirements:
– Lightweight
– Strong
– Stiff
– Durable
• σapplied ≈ 3.8 MPa
• HDPE chosen
– Meets all requirements
– σHDPE – UTS ≈ 45 MPa
sectioncross
pedalhalf
applied A
F
![Page 18: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/18.jpg)
Use of PrototypePedaling Demo
Voltage Output at 0.2 A
Sprockets in Motion
Condensing System
![Page 19: Pedal Purification University of Notre Dame Senior Design Group A6 November 28, 2006 Team Rallye (from left): Nicole Del Rey Eric Sabelhaus Mike McConnell.](https://reader036.fdocuments.in/reader036/viewer/2022062519/56649ccc5503460f94995d8a/html5/thumbnails/19.jpg)
CONCLUSIONS
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Conclusions• Prototype shows individual feasibility of:
– Mechanical energy transfer– Power Generation– Heating unit– Condensing unit
• Compact, collapsible and transportable design was achieved.
• Prototype proves feasibility while satisfying:– $400.00 budget– Design schedule
• Concept Design is feasible with modification to gear ratio.