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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

Cited: 2

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


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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%A Jian-ping HONG
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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
IS - 1
SP - 88
EP - 92
%@ 1673-565X
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A071430

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


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