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Mathematical Innovation of Zonal Air Supply Design for Enhancing Thermal Comfort in Hot, Humid Climates |
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PP: 605-634 |
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doi:10.18576/amis/190311
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Author(s) |
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Zuhair Jastaneyah,
Haslinda Mohamed Kamar,
Ahmad Hashmi,
F. A. Ghaleb,
Hakim AL Garalleh,
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Abstract |
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| Classrooms in hot and humid regions often depend on air conditioning systems with mixing ventilation for cooling. However, this method frequently fails to achieve adequate thermal comfort due to elevated temperatures and inefficient air distribution. This study introduces an innovative zonal air supply demonstrated that adopting a 4-zonal air supply system with stratum ventilation- featuring inlets at 1 meter and outlets at 0.2 meters-reduced the PMV and PPD ly design to enhance classroom thermal comfort in Jeddah, Saudi Arabia. Computational Fluid Dynamics (CFD) simulations were utilized to show the distributions of air temperature, velocity, and relative humidity, identifying the optimal zonal air supply configuration for maximizing thermal comfort. Parametric analysis were conducted to optimize the Predicted Mean Vote (PMV) and Percentage of People Dissatisfied (PPD) indices). The results reveal that, under the current ventilation setup, the indices values at three heights within the classroom Surpass the upper thresholds established by ASHRAE Standard-55, highlighting a significant need for improved thermal comfort. The parametric flow analysis indices by 69-98% and 64-74%, respectively. These results confirm that this approach substantially enhances thermal comfort in the classroom environment.
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