Transcript Bell Boat Redesign

Mark Novielli
Ron Morales
Joseph O’Sullivan
• 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
• 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
• Creating the apparatus
• Winding copper wire
• Mounting conductors
and magnets
• Creating an Alternating
Current
• Creating the
Circuit Board
• Capacitators and
Resistor
• Pulse Direct
Current
• Lighting LED light
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
•Success at first
•Broken circuit board
•Length and stiffness of the
ruler
•Consistent motion, Velocity of
the magnets
Bell Boat Redesign
Existing Design
• Calls for a back and forth motion
• Few moving parts
• Two induction coils
• One magnet
Redesign
• Calls for an up and down motion
• Few moving parts
• One induction coil
• One magnet
Existing Design
• 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
New Design
• 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
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
– F =σ A
– =4σ wL^3/Eb^3
max
max
max
• Fatigue Analysis Due to Bending stress:
– Sn curve for 10^6 life
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
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.
Other issues do exist, but
according to the major ones
presented, the redesign is
necessary and appropriate.
Wave data for further analysis