Abstract
A numerical study was done to evaluate the influence of an air extraction system localization on the performance of a new Heating, Ventilation, and Air Conditioned (HVAC) system based on horizontal confluent jets, in winter and summer conditions. Two extraction systems were studied: one located 1.8 m above the floor level and another located on the ceiling level. The numerical simulation is done considering a coupling between the Building Thermal Behavior, the Human Thermal Comfort and the Computational Fluid Dynamics numerical models. In the numerical simulation, it is used as a virtual chamber, equipped with a square table and with 4 seated virtual mannequins. The new HVAC system has 4 vertical ducts, each one installed at the corner of the chamber. Each vertical duct has a set of 200 round nozzles per line. To evaluate simultaneously the occupant thermal comfort level, the occupant air quality level, and the ventilation system performance, the Air Distribution Index is used. The results obtained allow to conclude that the use of the extraction system located 1.8 m above the floor level contributes to the improvement of HVAC system performance.
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