자동차 실내 IAQ향상을 위한 HVAC 내외기율 범위에 따른 수치 해석적 연구

The air quality inside the cabin of an automobile is closely related to the health of those who spend a lot of time in their vehicles. Automotive indoor air quality can be improved in several ways; the most common and effective of which was to dilute the polluted air with fresh air through the vehicle"s HVAC. In this study, we considered switching between the outside air mode and the recirculation mode of the automotive HVAC, and how that change affected the concentration of pollution within the vehicle. The possible range between the outside air mode and the recirculation mode of the vehicle"s HVAC obtained by this experiment was applied to the CFD analysis. Furthermore, the actual vehicles were infused with gas over time and were compared for the purposes of feasibility review of numerical simulation and concentration trends of experimental data. In the CFD analysis, UDF(user defined function) was applied to our code in order to decipher the range of outside air and recirculation mode of the HVAC. Data generated through the full range between outside air and recirculation mode of the vehicle"s HVAC were analyzed under a variety of conditions which allowed the identification of characteristics which changed indoor air quality source concentration.