NUMERICAL AND EXPERIMENTAL STUDY OF THE AIR DISTRIBUTION IN A NEGATIVE PRESSURE ISOLATION WARD

摘要

In healthcare facilities, the proportion of the healthcare professionals affected reached a surprising level during the SARS spreading period in China in 2003. The poor air distribution and ventilation strategy in the existed isolation wards contribute to bad indoor air quality situation. According to an actual negative pressure isolation ward in Beijing, which was used to isolate SARS patients, this paper carried out the numerical simulation and valid experiment to optimize the indoor air distribution for it. The result showed it is an acceptable ventilation system the supply air distributor is placed in one side of the ceiling opposite the patient's bed- head exhausts when the patient breathes peacefully. But the concentration of contaminant of the Breathing Zone of the Healthcare professionals would reach a high level when the patient is coughing severely although the decay of it would be fast.