Paper Conference

Proceedings of ASim Conference 2016: 3rd Asia conference of IBPSA-China, Japan, Korea


Air Migration from Negative Pressure Isolation Ward due to Different Door Opening Speed and Human Movement

S. Jo, J. Bang, G. Kim, M. Sung

Abstract: Background. Recent outbreak of new infectious disease such as Middle East Respiratory Syndrome (MERS) has taught us the importance of preventing hospital infection. In KOREA, Negative Pressure Isolation Ward (NPIW) are being installed to prevent the hospital infections. The NPIW maintains different pressure levels between ward and the public area to prevent air migration from ward. However, some former researches has shown that the door opening in NPIW leads to air migration from the ward due to failure of maintaining pressure difference. Method. In this study, Computational Fluid Dynamics (CFD) was performed to observe the air migration from NPIW in situations of different door opening speed and human movement. Four cases were simulated, two cases with different door operating speed and two cases with human movement involved. Door in the simulation was designed as one sided sliding door. Human moved from the center of the NPIW to the center of the anteroom at speed of 1 m/s. Results. Relatively faster door operating speed (0.6 m/s) showed less air migration rate. Case with human movement showed higher air migration rate since human movement dragged the air from NPIW to anteroom.
Keywords: Negative-pressure isolation ward, Airborne infection, Hospital infection, CFD