Response analysis on dynamic pollution control with a new type of low-speed fume hood

In order to comprehensively grasp the dynamic pollution control performance of the new type of low-speed fume hood, a simulation method combining static and dynamic based on CFD simulation is proposed. By studying the flow field distribution of static constant low speed and the dynamic pollution control performance of the fume hood under different door moving speeds and valve response time, the static and dynamic pollution control performance of the fume hood are evaluated and whether its working status is normal and safe is confirmed by two indicators: inlet wind speed uniformity and static pressure difference at the outlet. The results show that different door moving speed or different valve response time has a higher impact on the inlet wind speed, but a less impact on the static pressure difference. The final static pressure difference gradually tends to 0.1 Pa after the door is closed. From the perspective of air flow, although the entire dynamic process leads to drastic changes in the fume hood, with the generation and disappearance of vortice, there is no direct pollution leakage.