THE FULL SCALE AND CFD SIMULATION OF IMPINGING JET VENTILATION

Ventilation strategies play an important role of enhancing thermal comfort, Indoor Air Quality (IAQ) andenergy conservation in any conditioned space. Introduced in late 90s, Impinging Jet Ventilation (IJV) isthe system that can utilize stratification, while supplying with high velocity. With this characteristic andthe simplicity of its terminal configuration, IJV has an advantage over well-known DisplacementVentilation (DV) system. In this study, IJV system was investigated for establishing the protocol used inComputational Fluid Dynamics (CFD) simulation. To assure the validity of CFD simulation, the full scaleexperiment was simultaneously conducted in specially built HVAC-IEQ laboratory. This study showsthat the key variables to use CFD for IJV studies are turbulent models and nozzle treatments.Contradictory to the previous studies, k-? model shows the higher level of accuracy than RNG k-?model. The accuracy can be additionally improved by assigning the appropriate nozzle velocity profilein CFD simulation. Given the results obtained from this study, CFD simulation was proved to be theappropriate technique for further detail IJV studies.