Annex B - Additional Research Data

Results and Data Analysis


Experiment A

The test for the various wind speeds affecting the power output of the wind turbine.

We were supposed to test which wind speed (5.3m/s, 6.9m/s and 8.3m/s) would have the most power output.


Figure 1: Photo of Experiment A
Results of Experiment A:
Wind Speeds
Electrical Output
1 / mA
Electrical Output
2 / mA
Electrical Output
(Average) / mA
Converted to 2 sig. fig.)
Low ( 5.3 m/s)
31.6
30.9
31.20
Medium (6.9 m/s)
33.6
33.5
33.55
High (8.3 m/s)
33.4
33.5
33.45
Histogram of the results of Experiment A

Data Analysis


Reason For Wind speed: The reason why the highest wind speed did not generate the most power output is because the wind speed was too strong resulting in a higher wind resistance, causing the vanes to require more energy to turn faster.

The reason why the lowest wind speed did not generate the most power output is because the wind speed was too low and did not generate more wind energy since there was very little force pushing the the exposed contact area of the blades to spin, thus it generated the least power output.



Experiment B

The test for the Number of blades affecting the power output of the wind turbine.

We were supposed to test which number of blades (2, 3, 4, 6 and 12) would have the most power output.


Figure 2: Photos of Experiment B

Results of Experiment B:

Number of vanes
Electrical Output
1 /m A
Electrical Output
2 / m A
Electrical Output
(Average) / mA Converted to 2 sig. fig.)
2
30.9
30.6
30.80
3
33.4
33.6
33.50
4a (first test)
21.0
19.4
20.20
4b (clarification test)
31.4
31.5
31.50
6
35.6
37.5
36.55
12
29.0
32.7
30.85



Histogram of the results of Experiment B

Data Analysis


Reason For Vanes: The reason why the highest amount of vanes did not generate the most power output is because it caused it to weigh much more heavier and causing more wind energy to allow it to turn, therefore it generated lesser electricity.

The reason why the least vanes did not generate the most power output is because the least vanes had the least exposed surface area to the wind and thus, causing it to have a lesser force of wind acting on the surface of the blades, thus it generating one of the least power outputs.  




Experiment D

The test for the length of blades affecting the power output of the wind turbine.

We were supposed to test which length of blades that is measure by the area of each length of blades (15cm^2, 20cm^2 and 30cm^2) would have the most power output.



     

Figure 4: Photos of Experiment 4

Short: 15cm^2 area         Medium: 20cm^2 area               Long: 30cm^2 area


Results of Experiment D:
Length/Area of vane
Electrical Output
1 / mA
Electrical Output
2 / mA
Electrical Output
(Average) / mA Converted to 2 sig. fig.)
Long (15 cm^2)
23.2
22.8
23.0
Medium (20 cm^2)
37.9
38.1
38.0
Short (30 cm^2)
34.6
32.6
33.6

Histogram of the results of Experiment D


Data Analysis

Reason For Length of Blades: The reason why the longest of the blades did not generate the most power output is because the length of blades would affect the weight of the blades, making them heavier and less movable without force. Therefore it could not spin, resulting in lesser power output generated.

The reason why the lowest length of blades did not generate the most power output is because the area of exposed area is the least and very little wind could push the blades to spin, therefore it generated lesser power output.



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