Observation on Air Flow Distribution in Room by HVAC System using Ansys Fluent CFD Simulation

Abstract

Heating, Ventilation, and Air Conditioning (HVAC) systems are integral to maintaining a comfortable and healthy indoor environment. They regulate temperature, airflow, and air quality, ensuring optimal living and working conditions. In this study, Ansys Fluent was employed to design and optimize a single-room HVAC system, with a focus on achieving optimal thermal comfort, energy efficiency, and air quality. The research involved detailed CFD simulations to analyse airflow, thermal comfort, and velocity. Three cases will be focus for simulation work which are based on the location of the air-conditional unit in the room. The results revealed a clear relationship between air velocity and cooling effectiveness. Case 1, the baseline scenario, showed that higher velocities lead to increased cooling capabilities, as indicated by higher maximum pressures and lower average temperatures. Case 2 followed this trend but exhibited a slightly reduced cooling effect. However, it was Case 3 that stood out, presenting an optimized condition with significantly higher velocities and pressures, leading to the most substantial temperature reduction, reaching a low of 291.10 Kelvin (18.1°C) at 3.5 m/s. This optimal scenario demonstrated the importance of strategic air unit placement, resulting in enhanced efficiency, better air distribution, and optimized room airflow dynamics.