| dc.description.abstract | Negative pressure isolation wards accommodating patients affected highly contagious disease, comprising tuberculosis, SARS and so on, result the considerable health risks in the hospital staff.
Up to now, many countries have construct air-conditioning design and construction guidelines for special design specifications, including the supply and exhaust openings, the supply and exhaust amount, ACH, and the pressure difference inside and outside the ward. The indoor airflow patterns and indoor negative pressure is two of the most important indicator of safety.
In order to verify if the existing ward system can achieve the effect of negative pressure and isolation, and to understand the characteristics of the flow field of indoor air under different air conditioning and ventilation.
In this study, use computational fluid dynamics software FLUENT15.1 to build a model according to the size of Taiwan′s current actual negative pressure isolation wards and the wards including the patient area, toilet area, front room area. In the mean while, the setting of parameters follows the negative pressure isolation wards specification standard operating manuals. Under conditions of ACH 12 times, this study is divided into six modules to simulate and analyze to rate preferred set of configuration and air outlet angle, even can save energy. The results can provide basis for future deployment and improvement of ward.
Our verification for each module shows that, the negative pressure achieving good results, but may not be able to avoid the diffusion of pollutants within the ward.
The simulation results show that air outlet is disposed in the side wall supplying at a 30 degree modules achieving the best effect of negative pressure and isolation.
By a comprehensive comparison and analysis that, to establish a negative pressure isolation wards good performance of the primary should ensure that the air conditioning can be formed in a well-designed interior airflow patterns. Furthermore, the negative pressure is adequate. | en_US |