Yau, Yat Huang and Rajput, Umair Ahmed and Rajpar, Altaf Hussain and Lastovets, Natalia (2022) Effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: An experimental study. Energies, 15 (4). ISSN 1996-1073, DOI https://doi.org/10.3390/en15041265.
Full text not available from this repository.Abstract
A variable refrigerant flow integrated stratum ventilation (VRF-SV) system was proposed as an energy efficient substitute for conventional central cooling systems for buildings. The novel system provided conditioned air to enclosed spaces with high indoor air quality and thermal comfort. This study investigated the effects of different types of ASTDs on the performance of the VRF-SV hybrid system. The performance was experimentally evaluated with five air terminal types, including bar grille, double deflection grille, jet slot, perforated and drum louver diffusers. The evaluation was carried out using standard indices: temperature and velocity distribution, airflow pattern, effective draft temperature (EDT), air distribution performance index (ADPI), thermal sensation vote and comfort feedback survey. The results indicated that the ASTD type had a significant impact on airflow pattern. Furthermore, the bar grille diffuser provided the occupants with greater thermal comfort and acceptable indoor environment. Almost all the EDT values determined in the breathing zone in the case with bar grille diffuser found under the satisfactory range, i.e., -1.2 < K < 1.2. Based on these values, the ADPI for bar grille diffuser was calculated as 92.8%. Thus, the bar grille diffuser is recommended to be installed with the VRF-SV hybrid system in buildings.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya Partnership Grant [RK005-2020], GPF [GPF004A-2018], IIRG Grant [IIRG014-2019A], Jouf University [DSR-2021-02-03108] |
| Uncontrolled Keywords: | VRF-SV hybrid system; Air supply terminal device (ASTD); Air diffusion performance index (ADPI); Airflow pattern; Thermal comfort |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 15 Aug 2022 00:48 |
| Last Modified: | 15 Aug 2022 00:48 |
| URI: | http://eprints.um.edu.my/id/eprint/33447 |
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