Transcript File - RMSST Final!

Tidal Wave Design: Which Blade is best?
By: Patrick Massie & Jude Baquet
Rockdale Magnet School for Science and Technology
Introduction
o Preserving the environment is key to the human survival on
the planet we call Earth. That is why tidal energy can help
reduce pollutants let out into the air in and around coastal
cities. With this design, coastal cities will be able to lower
their demand on electricity produced from coal burning
plants and can greatly lower the costs in the long run. How
can we help coastal cities produce clean renewable energy
for the future?
o Tidal energy is not a very big renewable resource; however,
there is a potential in the future when further research is
done to maximize the efficiency of tidal energy to be able to
use.
Materials
Experimental Design Diagram
Materials
Equipment
Experimental Design Diagram
Aluminum Sheets
Power Drill
Dual Propeller Design
Water Sealant
Water Pump
Nuts and Bolts
Graph Pad
Acrylic Center
Stop Watch
Grooved rod
Kit Turbine
Screws
Ban Saw
Shrinking tube
Lab Quest
37 gallon container
Bunsen Burner
Water
Volt meter
Triple Propeller Design
Quadruple Propeller
Design
15 seconds; counted at
every millisecond
recording the voltage of
the rotating blade.
15 seconds; counted at
every millisecond
recording the voltage of
the rotating blade.
15 seconds; counted at
every millisecond
recording the voltage of
the rotating blade.
Procedures
1. There are thee blade design. Each blade is going to be the
exact same size; however, each propeller is going to have a
different number of blades. Depending on the number of
blades depends on the weight and motion of the blades in
the water current. They are cut out of large 3ft x 3ft
Aluminum sheets that were purchased from Lowes. All the
materials must be gathered such as the bilge pump and the
water tank that testing will be done in.
2. After construction, testing will be done in a large, plastic
container filled with many gallons of water. To simulate an
ocean current we will use a bilge pump to create a current.
The blades will be mounted and tested in the current of the
bilge pump. Each propeller design will have three trials of
15 seconds long. The Lab Quest will record a data point
each millisecond. Then Data Analysis will be done.
Hypothesis
o Engineering Goal: The design is to be built and tested to see
which of the three propeller designs is most cost effective as
well as energy efficient. The three different designs will be
made of Aluminum so that it is malleable as well as durable.
Descriptive Statistics
Trial 1-3: Two Propeller Design
o Hypothesis: Tidal energy is not a large renewable resource
used today. However, there is potential with this type of
resource. Tides and currents of the shore are forever and
never changing. The moon effects the movements and we
can decipher when and where the most efficient location
would be. Because of the known behavior of the ocean
shores and floors, we are able to tell where would the rig do
the best.
Trial 2
Trial 3
Variance
0.0028377914348786
0.0020534302869757
0.0018300845916115
Variance
Standard Deviation
0.053270924854733
0.045314791039745
0.042779487977435
Standard Deviation 0.080017099717752
0.214417
0.209411
0.208642
Average
Trial 1
Trial 2
Trial 3
0.0064027362472406
0.0038663044591612
0.0019128424724062
0.062179614498332
0.043736054604939
0.407523
0.400689
0.349252
151
151
151
# or Points
151
151
o
o
TEMPLATE DESIGN © 2007
www.PosterPresentations.com
o
These three trials we tested the double blade design for fifteen seconds three different times. Each trial
represents the up and down motion of the Volts generated by the ‘simulated current.’ The turbine used
was a small scale kit piece and didn’t pick up much voltage. The two propeller design harnessed the
least amount of volts in and around .209567 volts all together.
Trial 1
Trial 2
Trial 3
Variance
0.0018016769977925
0.0014105199116998
0.0033655902869757
Standard Deviation
0.042446165878587
0.037556889004546
0.058013707750632
0.334464
0.344305
0.341589
# or Points
151
151
Get the Bilge Pump and
water proof it.
Get the large container,
and get it ready full of
water.
Put in the different
propellers into the tank
for each trial.
Test each blade design
multiple times for a
large data area.
Continue testing all the
blades; double, triple,
and quadruple design.
Gather the data points
and plug them into the
designated choice of
data interpretation.
Conclusion.
The three trials here represent the triple blade design. On average, this design read more volts than the
double and the quadruple blade designs. It was around .381367 volts on average for all three tests.
Alike with the double blade design, three trials in fifteen minute increments were used.
Trial 7-9: Four Propeller Design
Average
Melt the pieces
together to form the
three propeller designs.
P value and statistical significance: (Trial 1 - 3)
The two-tailed P value equals 0.6195
By conventional criteria, this difference is considered to be not statistically significant
P value and statistical significance: (Trial 4 - 6)
The two-tailed P value equals 0.8526
By conventional criteria, this difference is considered to be not statistically significant
P value and statistical significance: (Trial 7 - 9)
The two-tailed P value equals 0.9724
By conventional criteria, this difference is considered to be not statistically significant
P value and statistical significance: (All Trials Together)
The two-tailed P value equals to 0.7147
By conventional criteria, this difference is considered to be not statistically significant
151
Background
o The oldest known tidal mill dates back to 787 A.D. in Spain,
France, and Britain. Tidal power is clean, non-polluting,
reliable and predictable. Because of the constant tidal waves
and currents, the resource is forever going and predictable to
the hour.
o One of the most recent projects in the tidal energy area is
Wales’s first commercial tidal energy farm, off the coast of
Anglesey. The entire project is approximately £70m Skerries
also with a £10m in UK government funding. The rigs will
be 40m (130ft) deep in water. The developers of the project
predict they can power 10,000 homes.
o In the fall of 2010, Fundy Ocean Research Center for
Energy (FORCE) and Offshore Energy Research (OEER)
held a workshop to discuss the topic of tidal research. The
purpose of such a workshop was to come up with research
topics and proposals. This is just one of a few times and
situations that people are trying to find cleaner energy. For
instance, the northern most town in the world is
incorporating the world’s first tidal energy farm. Kvalsund,
Norway, this town incorporating the tidal power, with the
managing director of Hammerfest Stroem.
Cut out the stencil
designs and place them
with the appropriate
propeller.
Inferential Statistics
o
# or Points
Draw the blade designs
out onto the Aluminum
sheets.
Trial 4-6: Three Propeller Design
Trial 1
Average
Gather Materials
Categorize the
materials/Set up into
sections.
151
With the fourth and final blade, to keep consistency we did three tests in fifteen second increments.
This was the second best blade design out of the three. On average it produced .342469 volts all
together. The lines represent the up and down motion of the volts read from the volt meter.
Conclusion Data
All Together
Variance
0.00644138553425
Standard Deviation
0.080258242780726
Average
# of Points
0.312255
1359
All together in the bar graph about we can see that on average that the three blade design was best in
harnessing the current’s energy.. Our hypothesis was supported and hopefully future research will tell
us why this outcome came along.
Conclusion and Future References
o
The purpose of this research project was to see if efficient, feasible tidal energy blades
could be built and tested to see what a in-lab environment would conclude.
o
Our Hypothesis was supported. The blade design in the middle on average was best of
using the natural current to harness the voltage.
o
Due to design flaw, the blades where off in angle along with size and shape. The sizes
were very similar but not completely accurate to each other. The blades where not put
on the hard plastic center piece all at the same angle. All these errors could cause the
rotation of the propeller to be off. Along with all this; out project was tampered with
and that rod connected to the turbine was not strait.
o
Future research includes further research in the history and mathematical designs. As
well as improving the design that was built to be able to efficiently work in the real
world. Hopefully after further research, a more practical design could be made.
o
Is it possible to see tidal energy be used more widely in the future? If so, who will be
able to come up with the best design?
o
A different design could have been used; this would give a wider arrange of blades to
see which would have the best outcome.