Implementation of Ultrasonic Sensing for High Resolution Measurement of Binary Gas Mixture Fractions

Sensors

Richard Bates⁶  Michele Battistin¹¹  Stephane Berry¹¹  Alexander Bitadze⁶  Pierre Bonneau¹¹  Nicolas Bousson⁸  George Boyd⁹  Gennaro Bozza¹¹  Olivier Crespo-Lopez¹¹  Enrico Da Riva¹¹  Cyril Degeorge⁴  Cecile Deterre¹  Beniamino DiGirolamo¹¹  Martin Doubek⁵  Gilles Favre¹¹  Jan Godlewski¹¹  Gregory Hallewell⁸  Ahmed Hasib⁹  Sergey Katunin²  Nicolas Langevin⁸  Didier Lombard¹¹  Michel Mathieu⁸  Stephen McMahon³  Koichi Nagai^6,10  Benjamin Pearson⁹  David Robinson^6,12  Cecilia Rossi^6,7  Alexandre Rozanov⁸  Michael Strauss⁹  Michal Vitek⁵  Vaclav Vacek⁵ 

[1] Deutsches Elektronen-Synchrotron, Notkestraβe 85, D-22607 Hamburg, Germany; E-Mail:;B.P. Konstantinov Petersburg Nuclear Physics Institute (PNPI), Orlova Roscha, RU-188300, Russia; E-Mail:;STFC Rutherford Appelton Laboratory—Harwell Oxford, Didcot, OX11 OQX, UK; E-Mail:;Department of Physics, Indiana University, Bloomington, IN 47405 7015, USA; E-Mail:;Czech Technical University, Technická 4, 16607, Praha Czech Republic; E-Mails:;SUPA School of Physics and Astronomy, University of Glasgow, G627QB, UK; E-Mails:;Academy of Sciences of the Czech Republic, 11000 Praha, Czech Republic; E-Mail:;Centre de Physique des Particules de Marseille, 163 Avenue de Luminy, 13288 Marseille, France; E-Mails:;Department of Physics & Astronomy, University of Oklahoma, Norman, OK 73019, USA; E-Mails:;Department of Physics, Oxford University, Oxford OX1 3RH, UK; E-Mail:;CERN, 1211 Geneva 23, Switzerland; E-Mails:;Department of Physics and Astronomy, University of Cambridge, Cambridge, CB3 0HE, UK; E-Mail:

关键词: ultrasonic;    binary gas analysis;    leak detection;   

DOI  :  10.3390/s140611260

来源: mdpi

【 摘 要 】

We describe an ultrasonic instrument for continuous real-time analysis of the fractional mixture of a binary gas system. The instrument is particularly well suited to measurement of leaks of a high molecular weight gas into a system that is nominally composed of a single gas. Sensitivity < 5 × 10⁻⁵ is demonstrated to leaks of octaflouropropane (C₃F₈) coolant into nitrogen during a long duration (18 month) continuous study. The sensitivity of the described measurement system is shown to depend on the difference in molecular masses of the two gases in the mixture. The impact of temperature and pressure variances on the accuracy of the measurement is analysed. Practical considerations for the implementation and deployment of long term, in situ ultrasonic leak detection systems are also described. Although development of the described systems was motivated by the requirements of an evaporative fluorocarbon cooling system, the instrument is applicable to the detection of leaks of many other gases and to processes requiring continuous knowledge of particular binary gas mixture fractions.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.