W IND –2– H 2 O MECH 4010: Design I Group 12: Jeffrey Allen Daniel Barker Andrew Hildebrand...
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WIND –2– H2OMECH 4010: Design I
Group 12: Jeffrey Allen Daniel Barker
Andrew Hildebrand
Supervised by: Dr. Alex Kalamkarov Client: Dr. Graham Gagnon
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Presentation Agenda
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Background
Design Requirements & Selection
Design & Analysis
Budget
Questions
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Design CompetitionProject inspired by theme of 2008 Design Competition
posed by WERC: A Consortium for Environmental Education and Technology Development
Competition held at New Mexico State University
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Competition Design ChallengeDesign a device that uses wind power
to directly power the filtration of brackish water
i.e. no generation of electricity
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Interdisciplinary Collaboration
Working with a team of two CivilEngineering students: Matt Follett
Dannica Switzer
Responsible for water filtration system
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Design Requirements
• Must start pumping at winds > 4 m/s
• Must produce minimum water Pressure of approximately 517 kPa (75 psi)
• Must have over speed control to prevent catastrophic failure
• Designed for constant use in remote locations
• Contain pump components
Suitable for contact with brackish water
• Scale prototype to fit within 10 x 10 ft area (WERC Competition regulation)
• Constructed from off the shelf materials
• Contain no electrical components
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Design Selection: Wind Power
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Source: P.L. Frankel, 1986
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Design Selection: Water Pump
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Final Design: Overall
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Windmill-Pump Matching
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Source: P.L. Frankel, 1986
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Water Pump Selection
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Selected pump to have:
• Piston diameter of 1 7/8” • Pump stroke of 3”
Source: Liu, Park, Magita, Qui, 2008
Source: www.deanbennettsupply.com
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Final Design: Blades
• Design for increased torque
• Blade Twist Angle: 27°
• Mount Angle: 52°
• Solidity Ratio: 0.75
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Finite Element Analysis: Blades
Thrust Load and Constraints
Nodal Displacements13
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Finite Element Analysis: Blades
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Final Design: Wheel & Hub
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Final Design: Gear Box
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Final Design: Over-Speed Protection
• Calculated critical stress in different components of the turbine at different wind speeds • Stress in turbine components reaches critical value at 11 m/s
• Cutout wind speed = 11 m/s
• Furling mechanism to activate at 11 m/s
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Final Design: Furling System Main components and factors affecting furling system design are:
• Swept Area and Weight of Turbine Blades
• Tail Fin Area
• Tail Weight and Length
• Tail Offset Angles
• Offset Distances from the Center of Rotation
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Swept Area and Weight of Turbine Blades
• The swept area of the turbine was selected to be 4.91m2
• Weight of the turbine blades (aluminum) and hub assembly (steel) was calculated in Solid Edge
• Total weight of assembly is approximately 50 kg
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Tail Fin Area, Weight & Length • The resulting area to create this moment at 11 m/s was found to be 0.48 m2
The optimum tail weight and length werecalculated as:
• Weight 14 kg • Length 1.8 m • Provides required moment 246.96 N m∙
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Tail Offset Angles
• A vertical offset angle of 13.7 degrees assists the blades back into the wind
• Horizontal offset angle of 20 degrees is included to make the required force on the tail fin
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Offset from Center of Rotation
• A distance of 76 mm from vertical axis to the turbine axis was used due to the gear ratio, crank arm length
• Based on the tail weight and area, the tail was mounted at a distance of 1.8m from the vertical axis in order to achieve the required total moment arm
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Budget
Pumping System = $593.63
Blade/Wheel Assembly = $610.31
Gearbox Assembly = $692.35
Tail/Furling Assembly = $253.65
Miscellaneous Costs = $846.35
Total = $2996.29Acquired Funding = $2000.00
Required Fundraising = $996.29
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Acknowledgements
Special Thanks to: Dr. Joshua Leon Dr. Graham Gagnon Dr. Alexander Kalamkarov
Dr. Julio Militzer
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