Implementation of ultrasonic sensing for high resolution measurement of binary gas mixture fractions

Bates, R. et al. (2014) Implementation of ultrasonic sensing for high resolution measurement of binary gas mixture fractions. Sensors, 14(6), pp. 11260-11276. (doi: 10.3390/s140611260)

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Abstract

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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Bates, Dr Richard and Bitadze, Dr Alexander
Authors: Bates, R., Battistin, M., Berry, S., Bitadze, A., Bonneau, P., Bousson, N., Boyd, G., Bozza, G., Crespo-Lopez, O., Riva, E., Degeorge, C., Deterre, C., DiGirolamo, B., Doubek, M., Favre, G., Godlewski, J., Hallewell, G., Hasib, A., Katunin, S., Langevin, N., Lombard, D., Mathieu, M., McMahon, S., Nagai, K., Pearson, B., Robinson, D., Rossi, C., Rozanov, A., Strauss, M., Vitek, M., Vacek, V., and Zwalinski, L.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Sensors
Publisher:MDPI AG
ISSN:1424-8220
ISSN (Online):1424-8220
Copyright Holders:Copyright © 2014 The Authors
First Published:First published in Sensors 14(6):11260-11276
Publisher Policy:Reproduced under a Creative Commons License

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