RESUMO
In dynamic state,the airflow and particle distribution of class Ⅲ biosafety laboratory is simulated by means of the CFD.The identical results of the simulation and the practical survey show good reliability of this experiment.The result indicates that the good unidirectional air distribution is formed in main lab and air distribution is the main factors to determine the character of particle distribution.
RESUMO
This paper analyzes and simulates the effect of the air change rate per hour (ACH) on contamination diffusion airflow field in turbulent clean-room of hole-board ventilation by using CFD. The quality of Contaminant Removal Effectiveness (CRE) is compared with ACH ranging from 15 to 70. According to the simulation,it is the best condition of CRE in clean room when air change rate is 55 per hour,and the conclusion provides a theoretic basis for engineering design.
RESUMO
The article mainly presents the key problems in class III bio-safety lab,including air-flow distribution,pressure gradient of the room,and the stability of pressure.Scientific methods for solving all the problems are also considered,which offer the theory evidence for the design of negative pressure control system in class III bio-safety lab.Volatile blow control and heat exchanger are recommended to be used in the negative pressure control system in class III bio-safety lab for energy conservation.