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CLC number: TB663

On-line Access: 2007-12-08

Received: 2007-08-07

Revision Accepted: 2007-10-30

Crosschecked: 0000-00-00

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Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.1 P.88-92

http://doi.org/10.1631/jzus.A071430


Bubble counter based on photoelectric technique for leakage detection of cryogenic valves


Author(s):  Tao JIN, Bin XU, Ke TANG, Jian-ping HONG

Affiliation(s):  Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   jintao@zju.edu.cn, ktang@zju.edu.cn

Key Words:  Photoelectric technique, Bubble counter, Leakage detection


Tao JIN, Bin XU, Ke TANG, Jian-ping HONG. Bubble counter based on photoelectric technique for leakage detection of cryogenic valves[J]. Journal of Zhejiang University Science A, 2008, 9(1): 88-92.

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author="Tao JIN, Bin XU, Ke TANG, Jian-ping HONG",
journal="Journal of Zhejiang University Science A",
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}

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%A Ke TANG
%A Jian-ping HONG
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%P 88-92
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A071430

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T1 - Bubble counter based on photoelectric technique for leakage detection of cryogenic valves
A1 - Tao JIN
A1 - Bin XU
A1 - Ke TANG
A1 - Jian-ping HONG
J0 - Journal of Zhejiang University Science A
VL - 9
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SP - 88
EP - 92
%@ 1673-565X
Y1 - 2008
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A071430


Abstract: 
In order to overcome the inconvenience of manual bubble counting, a bubble counter based on photoelectric technique aiming for automatically detecting and measuring minute gas leakage of cryogenic valves is proposed. Experiments have been conducted on a self-built apparatus, testing the performance with different gas inlet strategies (bottom gas-inlet strategy and side gas-inlet strategy) and the influence of gas pipe length (0, 1, 2, 4, 6, 8, 10 m) and leakage rate (around 10, 20, 30, 40 bubbles/min) on first bubble time and bubble rate. A buffer of 110 cm3 is inserted between leakage source and gas pipe to simulate the downstream cavum adjacent to the valve clack. Based on analyzing the experimental data, experiential parameters have also been summarized to guide leakage detection and measurement for engineering applications. A practical system has already been successfully applied in a cryogenic testing apparatus for cryogenic valves.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1] ANSI/ASTM, 2005. Standard Test Method for Leaks Using Bubble Emission Techniques. ANSI/ASTM E515-05.

[2] British Standards, 1984. Specification for Valves for Cryogenic Service. BS 6364.

[3] Genenger, B., Lohrengel, B., 1992. Measuring device for gas/liquid flow. Chemical Engineering and Processing, 31(2):87-96.

[4] Gong, Q.C., Liu, C.L., Wang, Y.H., 2005. Study and design of a new leak-detect system based on ultrasonic. Chinese Hydraulics & Pneumatics, (3):75-77 (in Chinese).

[5] Jenkins, W.A., 1952. A bubble counter for vacuum systems. Vacuum, 2(1):65-66.

[6] Jia, L.X., Moslemian, D., Chow, W.L., 1992. Cryogenic leak testing of tube fittings/valves. Cryogenics, 32(9):833-839.

[7] Juds, S.M., 1988. Photoelectric Sensors and Controls: Selection and Application. M. Dekker, New York.

[8] Mahoney, D.G., Ruiz, G.E., Farmer, J.W., Pflanz, T.L., Hall, W.D., Parsons, R.F., 1997. Sealed Parts Leak Testing Method and Apparatus for Helium Spectrometer Leak Detection. US Patent 5625141.

[9] Tang, Y.S., Wu, X.D., Li, F., Wan, L.X., Xing, W., 2002. Research and design of high precision micro air leakage detector. Chinese Journal of Scientific Instrument, 23(5):59-62 (in Chinese).

[10] Veenstra, T.T., Venhorst, G.C.F., Burger, J.F., Holland, H.J., ter Brake, H.J.M., Sirbi, A., Rogalla, H., 2007. Development of a stainless steel check valve for cryogenic applications. Cryogenics, 47(2):121-126.

[11] Weilert, M., Hahn, I., Barmatz, M., Higham, D., Frodsham, G., 2001. Progress on a small multi-cycling cryogenic fluid flow valve. Cryogenics, 41(11-12):813-816.

[12] Zhu, S.Y., 2000. A discussion about leakage criterion for valve seat test. Valve, (5):36-38 (in Chinese).

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