落地型斜氣簾式排氣櫃性能評估

李建宏

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落地型斜氣簾式排氣櫃性能評估

Performance Evaluation of an Inclined Air Curtain(IAC) Walk-in Fume Hood

李建宏 , Masters　　Advisor：蔡春進　　

繁體中文

排氣櫃；面速度；追蹤氣體量測；落地型排氣櫃； Fume hood ； Face velocity ； Tracer gas technique ； Walk-in fume hood

Abstract │ Reference (17) │ Altmetrics

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The inclined air-curtain (IAC) fume hood employed in the present work was constructed with the cross-flow fan at the bottom, deflection plate along the side walls, and a suction slot at the top of the cabinet. The containment in the cabinet were controlled effectively by using the two-dimension blow velocity and suction velocity.
A research of an IAC walk-in fume hood performance was operated in several methods. Face velocity was measured on sash opening plane to know the distribution and it’s average face velocity. Tracer-gas testing of the IAC walk-in hood was performed in two ways. One is in accordance with the methodology described in EN14175-3 Fume cupboards-Part 3：Type test methods. Tracer gas is 10%SF6 in nitrogen balance. Another one is self-developed method. Tracer gas is 5%SF6 in nitrogen balance and it is released by own designed ejector.
The mean leakage SF6 concentration is less than 0.005 ppm by inner test method based on EN14175-3. The peak concentrations are 0.027 ppm. It is classified as “Good” grade in Invent UK 2004 Standard. The tracer gas concentrations are less than 0.005 ppm in 10cm、15cm、20cm and 25cm sash opening by self-develop method. In 30cm and 35cm test, the peak concentration are 0.011 ppm and 0.01 ppm.
The average concentration of SF6 is 0.093ppm, peak concentration is 0.28ppm at Hej=60cm、H=20cm~100cm sash movement test. The average concentration is 0.041ppm, peak concentration is 0.108ppm at Hej=(74,40,60)cm、H=20cm robustness test. Both of results are met the limit values of professional association of the Germany chemical industry technical committee chemistry. When the blow jet velocity (Vb) decreased, the containment efficiency also reduced at sash movement test and robustness test. This result showed that an adequate blow jet velocity would provide a higher containment performance.

Reference ( 17 ) 〈TOP〉

[4] 曾麗靜，(2007)，實驗室氣櫃氣動力效應與污染物洩漏評估及性能改良技術之開發。國立臺灣大學職業醫學與工業衛生研究所論文，1-23。
連結：
[7] ANSI/ASHRAE 110-1995, “Method of Testing Performance of Laboratory Fume Hoods,” American Society of Heating, Refrigeration and Air Conditioning Engineers, Atlanta, GA, USA, February 1995.
連結：
[11] Mahdi H. Fahim，(2006)，Advantages of Using the ANSI/ASHRAE 110-1995 Tracer Gas Test Method Versus the ANSI/AIHA Z9.5-1992 Face Velocity Test Method for Chemical Laboratory Hood Certification，Master’s thesis of Medical University of Ohio
連結：
[13] Australian/New Zealand Standard (AS/NZS 2243.8：2001)：Safety in Laboratories Part 8：Fume Cupboards, 2001
連結：
[16] Rong Fung Huang , Jia-Kun Chen , and Kun-Chi Tang，(2014)，Development and Characterization of an Inclined Air-Curtain (IAC) Fume Hood. Ann. Occup. Hyg., 2015,Vol. 59,No. 5, 655-667
連結：

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