CHEN, HOU-YU
(2019)
Miniaturized Dehumidifier Integrated with Acetone Breathalyzer.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
In this article, we are targeting on simulating human breath test on acetone breathalyzer.
As increasing amount of literature shows that breath acetone has strong links with human
metabolism, health and diets such as nutrition related ketogenic diet. Normal individuals has breath
level ranging from 0.5 ppm to 2 ppm. People doing ketogenic diet would increase up to 40 ppm.
However, multiple studies point out the acetone sensor response diminished while testing under
high humidity level conditions. Therefore, the designed thermoelectric dehumidifier is applied on
acetone sensor to remove moisture. The results compared with and without input dehumidified
system on acetone concentration tests show that dehumidified process can precise the
concentration to 1ppm level at 90 % relative humidity.
For miniaturized dehumidifier to portable size, we introduced SU-8 negative photoresist to
create microchannel. Polydimethylsiloxane (PDMS) material contains inert, non-toxic and optical
clear properties which dominates the material choices on microfluidic devices. The PDMS
microchannel dehumidifier not only reduced humidity levels but minimized dehumidified devices
volume.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
16 September 2019 |
| Date Type: |
Publication |
| Defense Date: |
16 July 2019 |
| Approval Date: |
16 September 2019 |
| Submission Date: |
16 July 2019 |
| Access Restriction: |
2 year -- Restrict access to University of Pittsburgh for a period of 2 years. |
| Number of Pages: |
34 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Mechanical Engineering |
| Degree: |
MS - Master of Science |
| Thesis Type: |
Master's Thesis |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Dehumidifier, thermoelectric cooler, Peltier devices, acetone |
| Date Deposited: |
16 Sep 2019 20:28 |
| Last Modified: |
16 Sep 2021 05:15 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/37106 |
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