Thermal Comfort Assessment and Design Guidelines of a VRF-Integrated Stratum Ventilation System for a Large Tropical Building

Variable refrigerant flow (VRF)-integrated mechanical ventilation systems are currently being adopted in buildings as a revolutionary technique for heating, ventilation, and air conditioning (HVAC) solutions. The widely used robust strategies for combining these two systems are coupled and decoupled...

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Bibliographic Details
Published in:Arabian journal for science and engineering (2011) 2022-12, Vol.47 (12), p.16149-16170
Main Authors: Yau, Yat Huang, Rajput, Umair Ahmed
Format: Article
Language:English
Subjects:
Air conditioning
Air jets
Air temperature
Buildings
Design
Engineering
Humanities and Social Sciences
Integrated approach
multidisciplinary
Parametric statistics
Refrigerants
Research Article-Mechanical Engineering
Science
Temperature gradients
Thermal comfort
Ventilation
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Summary:Variable refrigerant flow (VRF)-integrated mechanical ventilation systems are currently being adopted in buildings as a revolutionary technique for heating, ventilation, and air conditioning (HVAC) solutions. The widely used robust strategies for combining these two systems are coupled and decoupled methods. This paper aimed to present a detailed guideline for designing the variable refrigerant flow-integrated stratum ventilation (VRF-SV) system for tropical buildings using coupled, decoupled, and a newly proposed fully integrated approach. Initially, the VRF-SV system was designed for a fictitious retail shop building located in the tropics. The thermal comfort performance of the designed system was then evaluated using standard indices. The findings of the parametric analyses indicate that there is no significant impact of the supply air temperatures on the total system capacity of the VRF-SV system when designed with decoupled or fully integrated approach. In contrast, the coupled design method showed a considerably higher impact on the overall system capacity. Further investigations revealed that, with a fully integrated design approach, a horizontal air jet at the head level, a slight and reverse thermal gradient between the head and foot levels (ΔT 1.5–0.1  =  − 2.85 °C), and a low percentage of thermally dissatisfied people (
ISSN:2193-567X
1319-8025
2191-4281
DOI:10.1007/s13369-022-06823-4