Numerical Investigation Of Stratum Ventilation Performance In Office Room

Abstract

The present work investigates air velocity, air temperature and CO2 concentration in office with stratum ventilation, which is a recently proposed air distribution system; It works by creating a layer of fresher air in the occupants' breathing zone, This is achieved by placing large supply inlets along the side-walls of the room just above the height of the occupants, standing or sitting, The supply velocity is sufficiently strong to provide fresh air directly to the occupants. The parametric studies is based on studying the effect of reducing the ventilation rate (ACH), changing supply air location and changing the exhaust location on the air velocity, temperature and CO2 concentration distributions inside the office. Suggesting of different configurations for HVAC systems and making a comparison between them including temperature, velocity, and CO2 concentration in order to select the proper configuration which leads to improvement of IAQ. CFD simulation is done for the office room using Fluent 14. Simulation results are validated using experimental measurements of previous research. Standard ke turbulence model was used for turbulent flow.