操作窗口对排风柜污染物控制效果影响的实验研究
Experimental study on effect of operating opening on contaminant control performance of fume hoods
摘要：
为提升排风柜的控污能力，在排风柜性能测试实验台上，采用示踪气体测试法和正交试验法，研究了操作窗口竖直开度、水平开度、面风速和操作窗口位置对排风柜前呼吸区污染物控制效果的影响。极差分析和方差分析结果表明：各因素对呼吸区污染物控制效果影响的强弱顺序依次为竖直开度、水平开度、面风速、操作窗口位置；操作窗口水平开度、竖直开度增大，排风柜对呼吸区的污染物控制效果减弱；面风速增大，控制效果增强；水平开度与竖直开度对控制浓度的影响存在较大的相关性，这2个因素对控制浓度的影响仅在另一因素达到一定水平后才能体现。
Abstract：
To improve the contaminant control performance of fume hoods，experimentally studies the effect of vertical operating opening, horizontal operating opening, face velocity and position of operating opening on the performance of contaminant control in the breathing zone in front of the fume hoods by tracer gas test method and orthogonal test method in a fume hood performance test room. The results of range analysis and variance analysis indicate that the order of influence of each factor on contaminant control effect in breathing area is vertical operating opening, horizontal operating opening, face velocity and position of operating opening. With the increase of horizontal operating opening and vertical operating opening, the control effect of fume hood on contaminant in the breathing zone decreases. With the increase of face velocity, the control effect increases. The influences of vertical operating opening and horizontal operating opening on the control concentration are highly correlated. The effect of each factor on the control concentration can only be reflected when the other factor reaches a certain level.
Keywords:fume hood, operating opening, contaminant control, orthogonal experiment, face velocity, vertical operating opening, horizontal operating opening, position of operating opening