3. Results

3.      Results

3.1    Experiment 1 results:

Box A: Box with the dehumidifier inside
Box B: Empty box (Control)

Experiment 1
Start (0 mins)
15 mins
30 mins
45 mins
60 mins
Experiment 1a (Relative Humidity)





Box A
66%
69%
71%
71%
72%
Box B
66%
66%
66%
67%
68%
Experiment 1b (Relative Humidity)





Box A
67%
70%
72%
72%
73%
Box B
67%
67%
67%
68%
69%

Figure 3.1.1 - Experiment 1a results
Screen Shot 2014-08-28 at 9.57.58 AM.png

Figure 3.1.2 - Graph of Experiment 1b results

Experiment 1b.png

Figure 3.1.3 - Graph of Experiment 1b results

Observations: We found out that the humidity level in both Box A and B had started to increase once we sealed both boxes up and started the experiment. However, the humidity in Box A rose faster and it had a higher relative humidity in the end of the experiment. Since Box A is completely sealed up, we concluded that the accelerated rise in relative humidity in Box A was due to the dehumidifier.  


3.2    Experiment 2 results:

Before beginning Experiment 2, we removed the layer of silica gel lining the pipes that were the output for dehumidified air. The silica gel had turned pink through the duration of Experiment 1 which indicated that it was filled water vapour and had reached its absorption capacity. Therefore, it was not able to absorb any water and perhaps the rise in humidity was because of the water vapour escaping the silica gel.


Experiment 2
Start (0 mins)
15 mins
30 mins
45 mins
60 mins
Experiment 2a (Relative Humidity)





Box A
70%
73%
74%
74%
74%
Box B
70%
68%
69%
70%
70%
Experiment 2b
(Relative Humidity)





Box A
71%
74%
75%
75%
76%
Box B
71%
69%
71%
71%
71%

Figure 3.2.1 - Experiment 2a results

Screen Shot 2014-08-28 at 5.55.03 PM.png
Figure 3.2.2 - Graph of Experiment 2b results

2b.png
Figure 3.2.3 - Graph of Experiment 2b results

Observations: The results of Experiment 2 were similar to that of Experiment 1 since the relative humidity in both boxes increased and the relative humidity in Box A increased at a faster rate than that of Box B. This shows that the silica gel that was removed from the pipes before the start of the experiment failed to affect the relative humidity, which means that humid air was escaping from the dehumidifier into Box A as there was no other air input into Box A. One difference was that there was a sudden drop in relative humidity in Box B at 15 minutes. The relative humidity rose up again when it was measured at 30 minutes.


3.3    Experiment 3 results

Before beginning Experiment 3, we lengthened the pipes that were the output for the dehumidified air and lead them out of Box A, before sealing up the entire box. This would result in none of the pipe openings being inside Box A and thus none of the humid air from the dehumidifier could be blown into the box.

Experiment 3
Start (0 mins)
15 mins
30 mins
45 mins
60 mins
Experiment 3a (Relative Humidity)





Box A
73%
73%
74%
75%
76%
Box B
73%
74%
74%
74%
74%
Experiment 3b (Relative Humidity)





Box A
74%
75%
76%
76%
77%
Box B
74%
75%
75%
76%
76%

Figure 3.3.1 - Experiment 3a results

Screen Shot 2014-08-28 at 5.57.21 PM.png
Figure 3.3.2 - Graph of Experiment 3b results

3b.png
Figure 3.3.3 - Graph of Experiment 3b results

Observations: Similar to Experiment 1 and 2, the relative humidity in Box A increased. However, the relative humidity in Box B remained constant unlike Experiment 1 and 2.

3.4    Special observations
Despite sealing up both boxes to ensure that no airflow can occur between the outside environment and the boxes, the relative humidity in both boxes still increased.    

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