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Bell-Boat Generator

Bell-Boat Generator. Mark Novielli Ron Morales Joseph O’Sullivan. Background. Water source of renewable energy Abundance and potential energy Wave Energy, onshore and offshore systems Wave movements: Up and Down, Back and Forth Generating electricity Electromagnetic induction. Materials.

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Bell-Boat Generator

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  1. Bell-Boat Generator Mark Novielli Ron Morales Joseph O’Sullivan

  2. Background • Water source of renewable energy • Abundance and potential energy • Wave Energy, onshore and offshore systems • Wave movements: Up and Down, Back and Forth • Generating electricity • Electromagnetic induction

  3. Materials Two Rod Magnets; 1”X1” Nd Feb - $30.00 Circuit Board; Perf 3” X 4-1/4” 0.1” - $1.99 Adjustable Resistor; 24mm 10K 0hm - $2.60 10 Pk Switching Diodes - $0.99 2 Capacitators; 1000MFD 16V Radial; $1.98 Copper Magnet Wire; 24 GA 1LB – $16.88 Steel Ruler; 24” - $9.98 3-4” PVC Pipe -Scrap Wood Boards and 2X4’s - Scrap Nails, Bolts, Nuts, Screws, Zip ties – Around the House

  4. Procedures Creating the apparatus Winding copper wire Mounting conductors and magnets Creating an Alternating Current

  5. Procedures Creating the Circuit Board Capacitators and Resistor Pulse Direct Current Lighting LED light

  6. Voltage Equation V = A X N X dB/dt V= generator output voltage (Volts) A= cross sectional area of the coil radius (A = πr2 in meters2) N = number of turns of the wire in the coil dB/dt = the rate of change of the magnetic field (Tesla / sec) • A=.002m, N = 1000, dB/dt = Approx1; V=2 • Voltage Reading = 2.1V

  7. Results/Discussion Success at first Broken circuit board Length and stiffness of the ruler Consistent motion, Velocity of the magnets

  8. Bell Boat Redesign

  9. Existing Design • Calls for a back and forth motion • Few moving parts • Two induction coils • One magnet

  10. Redesign • Calls for an up and down motion • Few moving parts • One induction coil • One magnet

  11. Pros Few moving parts Two induction coils Can operate in “chop” Cons Design relies on spring rate of material Stress in support shaft Precision machining required Existing Design

  12. Pros Few moving parts Lenient tolerances for construction Only significant stress is due to own weight Can be modified further via flywheel Cons One induction coil, less power Slow movement, may not work as effectively in “chop” Buoyancy is tricky, two buoys New Design

  13. Exploring the cons of the old design • Spring rate of material is inherent material property, material selection important. • Machining needs to be held to a tight tolerance in order to effectively pass magnet through coils. • Bending stress analysis: • ∆y=FL^3/3EI • Fmax=σmaxA • =4σmaxwL^3/Eb^3 • Fatigue Analysis Due to Bending stress: • Sn curve for 10^6 life

  14. Exploring the cons of the redesign • One induction coil, power output still needs to be explored • Slow movement may present an issue • Buoyancy may be tricky

  15. What should be done? • Cons of the old design present issues to which there exists no workaround, such as the limitation via bending stresses and material spring rates. • Cons of the redesign are addressable and fixable • Less power may be accommodated by introducing a flywheel mechanism that stores energy • Slow movement is also addressed by the introduction of a flywheel, this will keep inductor moving through “waveless periods” • Buoyancy can either be calculated or major structure can be anchored to the sea floor.

  16. Other issues do exist, but according to the major ones presented, the redesign is necessary and appropriate.

  17. Wave data for further analysis

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