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Effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: An experimental study

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...

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Main Authors: Yau, Yat Huang, Rajput, Umair Ahmed, Rajpar, Altaf Hussain, Lastovets, Natalia
Format: Article
Published: MDPI 2022
Subjects:
QC Physics
Online Access:http://eprints.um.edu.my/33447/
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spelling my.um.eprints.334472022-08-15T00:48:25Z http://eprints.um.edu.my/33447/ Effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: An experimental study Yau, Yat Huang Rajput, Umair Ahmed Rajpar, Altaf Hussain Lastovets, Natalia QC Physics 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. MDPI 2022-02 Article PeerReviewed 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 <https://doi.org/10.3390/en15041265>. 10.3390/en15041265
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QC Physics
spellingShingle QC Physics
Yau, Yat Huang
Rajput, Umair Ahmed
Rajpar, Altaf Hussain
Lastovets, Natalia
Effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: An experimental study
description 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.
format Article
author Yau, Yat Huang
Rajput, Umair Ahmed
Rajpar, Altaf Hussain
Lastovets, Natalia
author_facet Yau, Yat Huang
Rajput, Umair Ahmed
Rajpar, Altaf Hussain
Lastovets, Natalia
author_sort Yau, Yat Huang
title Effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: An experimental study
title_short Effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: An experimental study
title_full Effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: An experimental study
title_fullStr Effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: An experimental study
title_full_unstemmed Effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: An experimental study
title_sort effects of air supply terminal devices on the performance of variable refrigerant flow integrated stratum ventilation system: an experimental study
publisher MDPI
publishDate 2022
url http://eprints.um.edu.my/33447/
_version_ 1744649155222962176
score 13.211869

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