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Temperature and Humidity testing within enclosures using probes and excel


Humidity Testing

■ ✴

◉ ✴

Equipment:

Absorbent Materials:

✴- Temperature and Humidity Sensor ■- Arduino Demonolive ◉- Scales ➢- Enclosure Simulator ∞- Material Holder ◀- Misting Bottle

✴- Silica Crystals (kittie litter) ■- Rice (long grain) ◉- Cooking Salt ➢- Bi-Carb Soda


Humidity Testing

Method 1 - 3ml of Mist in Room

Method 2 - Humid Bathroom

1) Attach sensor to inside of container 2) Measure 50 grams of Material and place inside container( simulated enclosure). 3) Spray 3ml (3 sprays from misting bottle) of hot water into container and quickly close. 4) Let container sit in place for 15 minutes. Data is recorded every 20 seconds and collated in laptop. 5) Data is analysed and converted into graph form.

1) Make bathroom hot and humid - leave hot water running for 5 minutes at beggining of experiment, with heater on for full duration on experiment. 2) Attach sensor to inside of container 3) Measure 50 grams of Material and place inside container( simulated enclosure). 4) Let container sit in place for 15 minutes. Data is recorded every 20 seconds and collated in laptop. 5) Data is analysed and converted into graph form.


Humidity Testing

Control - Humid Bathroom

Control - 3ml Mist in Room

100

18.95

18.4

18.9 90

18.85

70

18.7 18.65

60

18.6 18.55

50

18 17.8

80 Humidity %

18.75

Temperature 째C

18.8

80 Humidity %

18.2 90

17.6 70

17.4 17.2

60

17 16.8

50

18.5 40 0

200

400

600

800

Time in Seconds Humidity

Temperature

1000

18.45 1200

16.6 40 0

200

400

600

800

1000

Time in Seconds Humidity

Temperature

1200

1400

16.4 1600

Temperature 째C

100


Humidity Testing

Bi-Carb - 3ml Mist in Room 100

18.4 18.3

90

Humidity %

80

18.1 18

70 17.9 17.8

60

Temperature 째C

18.2

17.7 50 17.6 40 0

100

200

300

400

500

600

700

800

900

17.5 1000

Time in Seconds Humidity

Temperature

Bi-Carb - Humid Bathroom 100

significant overall however.

21.5 21

90

20.5

Humidity %

80

20 70 19.5 60

19

50

18.5

40

18 0

100

200

300

400

500

600

Time in Seconds Humidity

Temperature

700

800

900

Temperature 째C

Comments: Bi-Carb Soda showed positive results in the bathroom test. These were not


Humidity Testing

Rice - 3ml Mist in Room 100

18.45 18.4

90

18.35

Humidity %

18.25 18.2

70

18.15 60

Temperature 째C

18.3

80

18.1 18.05

50

18 40 0

100

200

300

400

500

600

700

800

900

17.95 1000

Time in Seconds Humidity

Temperature

Rice - Humid Bathroom Comments: Rice was surprisingly effective. I am not sure if it is the actual rice which is

100

enabling the absorption or the starch which surrounds the rice. Further testing with washed rice and isolated starch needs to be performed to confirm the active absorptive material.

23.4 23.2

90

23

Humidity %

22.6 70

22.4 22.2

60

22 21.8

50

21.6 40 0

100

200

300

400

500

600

Time in Seconds Series1

Series2

700

800

900

21.4 1000

Temperature 째C

22.8

80


Humidity Testing

Silica - 3ml Mist in Room 19.2

100

19

90

Humid %

18.6 70 18.4 60

Temperature 째C

18.8

80

18.2

50

18

40 0

100

200

300

400

500

600

700

800

900

17.8 1000

Time in Seconds Humidity

Temperature

Silica - Humid Bathroom Comments: Silica has easily outperformed all other dehumidifying materials. This materi-

25.4

100

als can also be reused by simply applying heat and evaporating the absorbed moisture. It is also relatively cheap with 1.75kg costing 7.95 at a local petstore. The absorbance is also increased if you spread the material out rather than having it bunched together.

25.3

90

Humidity %

25.1

70

25 24.9

60

24.8 50

24.7

40 0

200

400

600

800

Time in Seconds Humidity

Temperature

1000

24.6 1200

Temperature 째C

25.2 80


Humidity Testing

Salt - 3ml Mist in Room 18.4 90

18.3

Humidity %

18.1 18

70

17.9 60

17.8

Temperature 째C

18.2

80

17.7

50

17.6 17.5

40 0

100

200

300

400

500

600

700

800

900

Time in Seconds Humidity

Temperature

Salt - Humid Bathroom Comments: Salt did work as an absorbent, however the rate at which absorption occurred

25.2

100

was to low for it be useful to protect electronics. One benefit of using this material would be how easily it is sourced and the cost, both making it highly accessible.

25 90

24.6

Humidity %

80

24.4 70 24.2 24

60

23.8 50 23.6 40 0

100

200

300

400

500

600

Time in Seconds Humidity

Temperature

700

800

900

23.4 1000

Temperature 째C

24.8


Temperature Testing

Probe in Hot Environment

Insulating Enclosures: 35

100

30

90

20 70 15 60

10

50

5

40

0 0

100

200

300

400

Time in Seconds Humidity

Temperature

500

600

700

Temperature °C

25

80 Humidity %

✴ Metal Ammunition Container ■- Styrofoam Container ◉- Plastic Storage Container ➢- Clear Plastic Bag (air acts as insulator) Method 1) Place probe within container and seal shut. 2) Place container in front of heater within sealed room. 3) Leave in place for 15 minutes, collecting data every 20 seconds 4) Colate and graph data collected with probe


Temperature Testing

Plastic Container in Hot Environment

Metal Container in Hot Environment 26

100

25.5

90

30

90

25

80

20

70

15

60

10

50

5

24 60

23.5

50

23

40

22.5

30

22 0

100

200

300

400

Time in Seconds Humidity

Temperature

500

600

700

40 0

200

400

600 Time in Seconds Humidity

Temperature

800

1000

0 1200

Temperature 째C

70

Humidity %

24.5

Temperature 째C

25

80 Humidity %

100


Temperature Testing

Clear Bag in Hot Environment

Styrofoam in Hot Environment 100

34

28.5 90

27.5

26.5

70

26 25.5

60

Humidity %

27

30

80 Temperature 째C

Humidity %

80

32

90

28

28 70 26 60

24

25 24.5

50

50

22

24 40 0

100

200

300

400

500

600

Time in Seconds Humidity

Temperature

700

800

900

23.5 1000

40 0

100

200

300

400

500

600

Time in Seconds Humidity

Temperature

700

800

900

20 1000

Temperature 째C

29

100


Results: Temperature Testing

Plastic insulated the most The clear plastic container gave the best insulating results. This could partly have to do with how the actual container was also sealed, using two side latches and rubber lining. It could also have to do with the form of the object. However it is clear that the material itself also has an effect as the form of the styrofoam and metal container was quite similar however gave varied results The metal container used a similar design with latches and rubber lining, however this did not improve insulation as much. These results were very surprising to me. I hypothesised that the metal container would be the best at insulating purely because it was equipment from the army to hold ammunition and therefore should be temperature stable. It was surprising to see how much it heated up compared to the other containers. The plastic bag, which was essentially going to work by having such a large space of air to maintain its temperature also showed bad results for insulation. One way to improve this test would be to have 4 simultaneous probes running in the same environment. This way it would be definite that there are no variances which are leading to differences in the data. This will be improved in future testing using two separate probes.

Results: Humidity Testing

Silica is most absorbent Silica has clearly come out on top as the most absorbent in the quickest amount of time. It has the highest rate of absorption. The rate of absorption appeared to increase as the silica was spread out, increasing its surface area. Perhaps some sort of padding could be made out of the silica which could line the inside of the enclosure, creating a highly absorptive surface as well protection in terms of insulation and padding for the bot. I believe the first set of data is not as valid as the second data collected inside a very humid environment, the bathroom. The bathroom had water droplets forming on the walls and tiles so i believe the readings which range in the 90% area are quite accurate. I believe the method of creating humidity with a spray bottle in the first experiment did not properly simulate humidity immediately. Rather it created an environment within the enclosure which was wet and gradually became more humid, giving results where humidity constantly rose. I decided to include both sets of data to show that still in both the experiments silica showed the best results.

Temperature and Humidity testing within an enclosure  

Temperature and Humidity testing within an enclosure using a humidity and temperature probe, arduino, and excel. Silica and Plastic were fou...

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