CFD Analysis of Velocity and Temperature under Variable Flow Condition in an Air Distribution of Air Conditioning

Human comfort and commercial needs for controlled thermal environment are increasing rapidly. It is needed for the better performance of the man power apart from domestic comfort need and to protect the goods and food material from being deteriorating. The air in an air conditioned space is maintained at certain desired condition with controlled temperature, humidity and velocity of flow. This paper presents the work done by the various researchers in air conditioning and distribution technology and the effect of various parameters of air distribution on indoor environment. Three cases of air flow have been considered in the present work for the typical room conditions. The air velocity is changed in these three cases while the other parameters are unchanged. The velocity is changed from 0.1 m/s, 0.2 m/s and 0.3 m/s respectively It is seen in the figure that when the location of the return air vent is changed for the same value of the supply air velocity and temperature, the temperature and velocity distributions are almost uniform, while when the values of temperature and velocity of the supply air are changed, the velocity and temperature distributions are significantly changing. Thus the best value of the velocity can be obtained from this analysis. Computational Fluid Dynamics (CFD) tool is gaining importance modern tool capable of providing useful engineering solutions to the problems particularly involving fluid flow and heat transfer with the saving of cost and time.