An Experimental Study of Real-time Temperature Distribution using Iris Damper without Control System: A Justification Analysis

Abstract

Thermal comfort, influenced by temperature distribution, plays a crucial role in maintaining occupants' well-being and productivity within indoor environments. Most of the building with centralized air conditioning system is accommodated with inlet diffuser with fixed opening area of inlet air damper. This paper present the justification that the indoor temperature distribution is struggling to be maintained at ideal temperature when using fixed inlet air damper. Experimental study has been conducted using iris damper pattern with three opening type and 4 occupancy conditions. Results shows that when there is no occupant, the indoor temperature will keeps decreasing below 24°C. Meanwhile, with the increment of occupancy, the indoor temperature keeps increasing and able to reach up to 27°C. This condition will leads to thermal discomfort among occupants. Thus, a step-based control method is reliable to be implemented in manipulating the opening area of iris damper to maintain the indoor temperature at the ideal temperature.