摘要
从排风柜设计、实验室环境及运行三方面,总结分析了实验室排风柜性能的影响因素。排风柜内空气流动复杂,背部挡板可以减小柜内涡流,优化排风柜性能;排风柜排风口设置和拉门把手的结构设计影响柜内气流组织。实验室通风对排风柜能形成明显干扰,应选择低风速、大风量的送风口,并与排风柜保持至少1.5m距离。在实际运行中:热源体显著改变排风柜内气流组织,应尽量减小热源负荷;操作人员及实验仪器等障碍物会扰动排风柜附近气流,恶化排风柜性能;提升拉门会导致操作口面积增大,污染物泄露风险增加。
Summarize and analyze factors of fume hoods performance in aspect of hoods design, laboratory environment and work practice. The airflow in hoods is complex. Baffle could reduce the size of recirculating flow and then improve hoods performance. The outlet and sash handle have a great impact on air pattern in hoods. Ventilation in laboratory affects fume hoods so the air supply outlet should be chosen as low-speed and large-volume and kept away at least 1.5m from hoods. For actual operation： The heat load should be reduced to prevent air pattern in hoods being changed; The workers and devices could affect air flow around foods and then reduce hood performance; Raising sash would increase the sash opening and then hoods performance would be reduced.
作者
马雨轩
刘东
程勇
Ma Yuxuan, Liu Dong and Cheng Yong
出处
《洁净与空调技术》
2018年第1期4-10,共7页
Contamination Control & Air-Conditioning Technology
关键词
排风柜设计
排风柜性能
面风速
实验室通风
综述
Fume Hoods design
Fume Hoods performance
Face velocity
Laboratory ventilation
Review
