Rahman, Tazia (2026) Investigation of Personal Comfort Systems: Experimental Evaluation of Desk and Wearable Fans in Shared Office Environments. Masters thesis, Concordia University.
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Abstract
Personal Comfort Systems (PCSs), such as desk fans, can reduce perceived warmth through elevated air movement but their spillover effect on nearby occupants remains insufficiently investigated. In addition, few studies have directly compared different fan mechanisms, such as bladed, bladeless desk fans and wearable fans. This study aims to quantify the effects of personal fan (three desk and two wearable fans) configurations and operating speeds on thermal comfort under ASHRAE Standard 55. It further examines zonal cooling performance and cooling efficiency of different fans while assessing vertical air distribution at multiple body levels of the primary occupant and associated localized draught risk to adjacent co-workers. Experiments were conducted in a controlled office space (25 ± 1 °C, 40 ± 5% RH) with a 23-segment adaptive thermal manikin. Results show that whole-body cooling is primarily governed by airflow intensity and distribution. Conventional bladed desk fans produced the strongest cooling but exceeded recommended airspeed limits, whereas USB-powered and bladeless fans maintained guideline airspeeds providing controlled cooling with more uniform zonal Corrective Power (CP). Wearable fans targeting the thermosensitive face–neck region achieved cooling comparable to broader breathing-zone–torso airflow. Co-worker measurements revealed higher draught risk (categories B–C) at rear positions. Although subjective responses in real offices were not assessed, the direct comparison of PCS technologies using manikin-based physiological and airflow measurements provide new insights into the spatial cooling and their influence on overall comfort. The findings also offer guidance for improving PCS performance evaluation methods and optimizing fan-based PCS design for practical implementation in shared environments.
| Divisions: | Concordia University > Gina Cody School of Engineering and Computer Science > Building, Civil and Environmental Engineering |
|---|---|
| Item Type: | Thesis (Masters) |
| Authors: | Rahman, Tazia |
| Institution: | Concordia University |
| Degree Name: | M.A. Sc. |
| Program: | Building Engineering |
| Date: | 9 March 2026 |
| Thesis Supervisor(s): | Ouf, Mohamed |
| ID Code: | 997011 |
| Deposited By: | Tazia Rahman |
| Deposited On: | 29 Jun 2026 14:30 |
| Last Modified: | 29 Jun 2026 14:30 |
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