Numerical study on mixing performance of separate-type HVAC system for industrial vehicles

Industrial vehicles have no vehicle-induced wind in operation mode, so they require more than one fan to secure enough air. Thus, a separate-type HVAC system with two fans is proposed in this study. Thanks to the two fans installed on both sides, this system can provide enough air, but it causes temperature imbalance. To deal with this issue, we performed a numerical study on the mixing performance of the several separate-type HVAC systems using CFD analysis. Experiments were also carried out to validate the numerical model. The results of the temperature and mass flow rate data matched well with the CFD results. Based on this validated model, a case study was done on three different HVAC models that have different configurations in the mixing zone. The results and discussion were done on the mixing performance and the characteristics of the velocity fields and pressure losses.