Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Building Services Engineering | en_US |
| dc.creator | Bai, Xiaoye | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/8225 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | - |
| dc.rights | All rights reserved | en_US |
| dc.title | Tracer gas technique for ventilation rate characterization | en_US |
| dcterms.abstract | Ventilation rate not only influence office work performance, it is special important for occupier's physical health. This project researched states of doors and windows how influence the ventilation rate. Using dual tracer gas of CO2 and SF6 measured indoor concentrations. The SF6 selected as the material of constant concentration and calculated the mass fraction; otherwise, CO2 tested the air change rate by the method of concentration decay. The UVW Anemometers be selected to collected wind speed from top of the building (outdoor) and the corridor separately. The on-site measurement select two modes, close mode which is all doors and windows are closed and open mode is closed all doors but indoors shutters kept 45degree opened. In close mode, roof wind has a little influenced on indoor concentration, corridor wind have effect on concentration and mass fraction. In open mode, roof wind and corridor wind both have a significantly effect on air transmission. Linear regression calculate the air change rate (ACH), however, the relationship of ACH and air born is not clear. In the end, this paper propose some advices to improve the measurements. | en_US |
| dcterms.extent | ii, 45 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2015 | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.educationalLevel | M.Eng. | en_US |
| dcterms.LCSH | Ventilation -- Measurement. | en_US |
| dcterms.LCSH | Ventilation. | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b28261318.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 2.04 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/8225