| Author: | QIN, Yingjuan |
| Title: | Experimental study on testing the condensation risk alleviation of radiant cooling panels using nano-engineered superhydrophobic surface materials in indoor condition |
| Advisors: | Niu, Jianlei (BSE) |
| Degree: | M.Eng. |
| Year: | 2021 |
| Subject: | Heat -- Radiation and absorption Cooling Hong Kong Polytechnic University -- Dissertations |
| Department: | Department of Building Services Engineering |
| Pages: | ix, 88 pages : color illustrations |
| Language: | English |
| Abstract: | Radiant cooling system is an alternative for traditional air conditioning technology, but the condensation risk that occurs on it limit the application especially in hot and humid environment. This research finds out a novel nano-engineered superhydrophobic material that have the trend to be used on radiant cooling panels to alleviate the condensation risk through experimental study, and the size of droplets is used to evaluate the condensation performance of the sample surface. The condensation tests for the novel sample would be conducted in different indoor conditions with unchanged indoor temperature and different relative humidity and air velocity. It is found that when the relative humidity is higher, the diameter of droplet is larger. And all the diameters of large-size droplets appear on aluminum based superhydrophobic sample surface are all less than 350μm. While air velocity has little effect on the size of droplets on sample surface and the comparation experiments among superhydrophobic sample and aluminum sample and panel surface can also indicate that superhydrophobic sample performs much better than the latter two ones with nearly no large-size droplets formed on sample surface during 8-hour experiment time. Thus, this research can only provide a positive viewpoint that this novel superhydrophobic sample fabricated on radiant cooling panel has better condensation performance than many other samples. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 5737.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 10.8 MB | Adobe PDF | View/Open |
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