操作窗口水平开度对排风柜性能影响的研究
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摘要
本文以某台式排风柜为研究对象,以排风柜操作窗口水平开度及开口位置为变量,在排风柜标准化实验台上,采用实验测试的方法,研究在一定面风速条件下,排风柜操作窗口水平开度的变化对排风柜性能的影响。研究先进行了面风速测试,重复测试结果的分析表明。在同一面风速下,操作窗口水平开度及开口位置的变化并未对面风速分布的均匀性造成显著影响。然后,分析了排风柜示踪气体测试中,采样时间对测试结果不确定度的影响。分析结果表明,所使用的测试系统在示踪气体采样时间达到1800 s后,测试结果的相对不确定度降至10%以下。最后,采用示踪气体测试方法对比分析了操作窗口水平开度对排风柜污染物控制效果的影响。分析结果表明,操作窗口水平开度的大小对排风柜污染物控制效果有着较大的影响,操作窗口水平开度每降低400 mm,示踪气体测试检测到的控制浓度降低一个数量级水平。
The paper takes a certain desktop fume hood as the study object, the horizontal opening and opening position of the fume hood operation window as variables, adopts the experimental testing method and explores the influence of the horizontal opening changes of the fume hood operation window to the property of the fume hood operation window under a certain face velocity. Firstly, face velocity is tested in this study. The repeated test results showed that the changes of the horizontal opening and opening position of the fume hood operation window didn't have significant influence on the homogeneity of the distribution of face velocity. Secondly, The influence of sampling time on the uncertainty of the test results in trace gas measuring is analyzed. The results showed that the relative uncertainty of the test results decreased to below 10% when the sampling time of the trace gas in the adopted test system was up to 1800 s.Lastly, the influence of the horizontal opening of the operation window on the contaminant control of the fume hood is analyzed by using trace gas test method. The results show that the size of the horizontal opening of the operation window has significant impact on the contaminant control of the fume hood. The control concentration detected by the trace gas measuring decreases by an order of magnitude level for every 400 mm reduction in the horizontal opening of the operation window.
The paper takes a certain desktop fume hood as the study object, the horizontal opening and opening position of the fume hood operation window as variables, adopts the experimental testing method and explores the influence of the horizontal opening changes of the fume hood operation window to the property of the fume hood operation window under a certain face velocity. Firstly, face velocity is tested in this study. The repeated test results showed that the changes of the horizontal opening and opening position of the fume hood operation window didn't have significant influence on the homogeneity of the distribution of face velocity. Secondly, The influence of sampling time on the uncertainty of the test results in trace gas measuring is analyzed. The results showed that the relative uncertainty of the test results decreased to below 10% when the sampling time of the trace gas in the adopted test system was up to 1800 s.Lastly, the influence of the horizontal opening of the operation window on the contaminant control of the fume hood is analyzed by using trace gas test method. The results show that the size of the horizontal opening of the operation window has significant impact on the contaminant control of the fume hood. The control concentration detected by the trace gas measuring decreases by an order of magnitude level for every 400 mm reduction in the horizontal opening of the operation window.
引文
[1]陈嘉昕.人体对实验室排风柜内空气污染物逸散的影响研究[D].上海:同济大学,2018.
[2]Kwangseog Ahn S W L D.A review of published quantitative experimental studies on factors a ffecting laboratory fume hood performance[J].Journal of Occupational and Environmental Hygiene,2008,5(11):735-753.
[3]Pamela L.Greenley C E B L.Containment testing of laboratory hoods in the as-used condition[J].Applied Occupational and Environmental Hygiene,2000,15(2):209-216.
[4]Lan N S V.Numerical simulation of airflow around a variable volume/constant face velocity fume cupboard[J].AIHAJ,2001,62(3):303-312.
[5]ASHRAE.ANSI/ASHRAE110-2016 Method of Testing Performance of Laboratory Fume Hoods[S].Atlanta:2016.
[6]国家机械工业局.JB/T6412排风柜[S].北京:机械工业出版社,1999.
[7]潘承毅.数理统计的原理与方法[M].上海:同济大学出版社,1993.
[8]皮英俊.化学实验室室内气体污染物的扩散特性研究[D].上海:同济大学,2014.
[9]王新林,程勇,刘东.内置有障碍物时排风柜性能的实验研究[J].建筑热能通风空调,2012,31(1):23-27.
[10]陈道俊,李强民.送风对实验室排风柜气流控制的影响[J].制冷空调与电力机械,2004,(6):22-24.
[11]Kierat W,Bivolarova M,Zavrl E,e t al.Accurate assessment of exposure using tracer gas measurements[J].Building and Environment,2018,131:163-173.
[2]Kwangseog Ahn S W L D.A review of published quantitative experimental studies on factors a ffecting laboratory fume hood performance[J].Journal of Occupational and Environmental Hygiene,2008,5(11):735-753.
[3]Pamela L.Greenley C E B L.Containment testing of laboratory hoods in the as-used condition[J].Applied Occupational and Environmental Hygiene,2000,15(2):209-216.
[4]Lan N S V.Numerical simulation of airflow around a variable volume/constant face velocity fume cupboard[J].AIHAJ,2001,62(3):303-312.
[5]ASHRAE.ANSI/ASHRAE110-2016 Method of Testing Performance of Laboratory Fume Hoods[S].Atlanta:2016.
[6]国家机械工业局.JB/T6412排风柜[S].北京:机械工业出版社,1999.
[7]潘承毅.数理统计的原理与方法[M].上海:同济大学出版社,1993.
[8]皮英俊.化学实验室室内气体污染物的扩散特性研究[D].上海:同济大学,2014.
[9]王新林,程勇,刘东.内置有障碍物时排风柜性能的实验研究[J].建筑热能通风空调,2012,31(1):23-27.
[10]陈道俊,李强民.送风对实验室排风柜气流控制的影响[J].制冷空调与电力机械,2004,(6):22-24.
[11]Kierat W,Bivolarova M,Zavrl E,e t al.Accurate assessment of exposure using tracer gas measurements[J].Building and Environment,2018,131:163-173.