Air-Rain System-Concept and Numerical Assessment on Its Ability Against the Spread of Chemical Agents in Large Space Public Buildings

The Air-Rain system is a new immune building approach to protect the indoor air in Large Space Public Buildings (LSPBs) from the airborne transmission of harmful chemical agents. A uniform, downward air flow is employed in this system in order to constrain the spread of both bio-particles and chemical agents. The numerical research with an experimentally tested model on Air-Rain system found its air ventilation with a speed of 0.02m/s can indeed constrain the spread of chemical agents in LSPBs and its safety is higher than that of Displacement Ventilation and Hybrid Ventilation in LSPBs.