摘要
运用计算流体动力学理论和有限元方法,对机动卫生装备的舱室温度环境进行了仿真研究,形成了合理的气流组织形态,温度分布满足(25±3)℃、气流速度小于0．5m/s;按照监测预警、报警控制、滤毒净化、建立超压、超压监测5个控制环节建立了不小于300Pa的超压集体防护技术体系,能有效防止大气环境中的有毒有害生物气溶胶、化学毒气和放射性物质进入舱室,保证了舱室环境的安全性;对建立超压之前进入舱室的污染物,模拟了其在滤毒通风装置作用下的运动扩散规律,结果表明:在130s时间内污染物浓度能从5 000ppmv迅速衰减至10ppmv。
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 ovcrpressure not less than 300 pascal and make the compartment free of the air containing biological toxin, noxious chemical fumes and radioaetive 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.
出处
《医疗卫生装备》
CAS
2006年第2期37-40,共4页
Chinese Medical Equipment Journal
关键词
机动卫生装备
舱室温度环境
有毒有害物质
超压集体防护
数值模拟
mobile medical equipment
compartment temperature-environment
toxic and noxious contaminant
collective overpressure protection
numerical simulation
