ABSTRACT
The compartment temperature- environment of mobile medical equipment is simulated by using computational fluid dynamics (CFD) and finite element method (FEM). Simulation results indicate that the airflow shape is reasonable and the compartment temperature can be kept at (25?3)℃, and that the velocity of airflow is less than 0.5m/s. The collective overpressure protection system is established according to the following 5 procedures, including alarming, controlling, filtering toxin, establishing overpressure and overpressure monitoring. It's proved that the protection system can form the overpressure not less than 300 pascal and make the compartment free of the air containing biological toxin, noxious chemical fumes and radioactive dust. The contamination process of the compartment is simulated in case of some toxic and noxious contaminant flowing into the compartment. The results are obtained that concentration distribution of contaminant attenuates rapidly from 5,000ppmv to 10ppmv during 130 seconds.