CFD study on the impinging jet ventilation towards indoor air quality

Lim, Yin Ci (2021) CFD study on the impinging jet ventilation towards indoor air quality. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The impinging jet ventilation system is a relative modern ventilation system which combine the positive effects from mixing and displacement ventilation. One of the demerits of this system is when for room cooling purpose, the cold supply air jet unable to distribute evenly in the room. The objective of this project is to develop a CFD model for impinging jet ventilation system and investigate the effects of position of exhaust and the shape of inlet toward the thermal condition and velocity field in a closed area. As the result, the position of exhaust brings a larger impact to the thermal condition in the test model while the shape of inlet shows a bigger influence in the velocity field in the test model when comparing to the position of exhaust. When placing the exhaust on the top of heat source, the heat generated can be remove more easily comparing to others location. Meanwhile by using a triangular inlet can lead to a higher inlet air velocity while maintaining a constant air flowrate. Finally, the recommendations for further research on the study of impinging jet ventilation system by using CFD are suggested such as run the simulation with ACT extension for thermal comfort so that the contour plots for mean age of air, PMV and PPD can be generate in the result tab.

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