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Your search keyword '"Crespo-Lopez, O."' showing total 3 results
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3 results on '"Crespo-Lopez, O."'

1. Implementation of an ultrasonic instrument for simultaneous mixture and flow analysis of binary gas systems

Author

Alhroob, M., primary, Bates, R., additional, Battistin, M., additional, Berry, S., additional, Bitadze, A., additional, Bonneau, P., additional, Bousson, N., additional, Boyd, G., additional, Bozza, G., additional, Crespo-Lopez, O., additional, Degeorge, C., additional, Deterre, C., additional, DiGirolamo, B., additional, Doubek, M., additional, Favre, G., additional, Godlewski, J., additional, Hallewell, G., additional, Hasib, A., additional, Katunin, S., additional, Langevin, N., additional, Lombard, D., additional, Mathieu, M., additional, McMahon, S., additional, Nagai, K., additional, O'Rourke, A., additional, Pearson, B., additional, Robinson, D., additional, Rossi, C., additional, Rozanov, A., additional, Strauss, M., additional, Vacek, V., additional, Vaglio, R., additional, Young, J., additional, and Zwalinski, L., additional

Published
2015
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2. A custom on-line ultrasonic gas mixture analyzer with simultaneous flowmetry developed for use in the LHC-ATLAS experiment, with wide application in high and low flow gas delivery systems

Author

Bates, R., primary, Battistin, M., additional, Berry, S., additional, Berthoud, J., additional, Bitadze, A., additional, Bonneau, P., additional, Botelho-Direito, J., additional, Bousson, N., additional, Boyd, G., additional, Bozza, G., additional, Da Riva, E., additional, Crespo-Lopez, O., additional, Degeorge, C., additional, Deterre, C., additional, DiGirolamo, B., additional, Doubek, M., additional, Favre, G., additional, Godlewski, J., additional, Hallewell, G., additional, Katunin, S., additional, Langevin, N., additional, Lombard, D., additional, Mathieu, M., additional, McMahon, S., additional, Nagai, K., additional, Robinson, D., additional, Rossi, C., additional, Rozanov, A., additional, Vacek, V., additional, Vitek, M., additional, and Zwalinski, L., additional

Published
2013
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3. A Custom Online Ultrasonic Gas Mixture Analyzer With Simultaneous Flowmetry, Developed for the Upgraded Evaporative Cooling System of the ATLAS Silicon Tracker.

Author

Bates, R., Battistin, M., Berry, S., Berthoud, J., Bitadze, A., Bonneau, P., Botelho-Direito, J., Bousson, N., Boyd, G., Bozza, G., Da Riva, E., Crespo-Lopez, O., Degeorge, C., Deterre, C., DiGirolamo, B., Doubek, M., Favre, G., Godlewski, J., Hallewell, G., and Katunin, S.

Subjects
NUCLEAR science, ULTRASONIC equipment, FLOW measurement, EVAPORATIVE cooling, COMPUTATIONAL fluid dynamics
Abstract

We describe a combined ultrasonic instrument for continuous gas flow measurement and simultaneous real-time binary gas mixture analysis. In the instrument, sound bursts are transmitted in opposite directions, which may be aligned with the gas flow path or at an angle to it, the latter configuration being the best adapted to high flow rates. The combined flow measurement and mixture analysis algorithm exploits the phenomenon whereby the sound velocity in a binary gas mixture at known temperature and pressure is a unique function of the molar concentration of the two components. The instrument is central to a possible upgrade to the present ATLAS silicon tracker cooling system in which octafluoropropane (\C3 {\F}8) evaporative cooling fluid would be replaced by a blend containing up to 25% hexafluoroethane (\C2{\F}6). The instrument has been developed in two geometries following computational fluid dynamics studies of various mechanical layouts. An instrument with 45^\circ crossing angle has been installed for commissioning in the ATLAS silicon tracker cooling system. It can be used in gas flows up to 20\thinspace000 l.min^-1 and has demonstrated a flow resolution of 2.3% of full scale for linear flow velocities up to 10 m.s^-1 in preliminary studies with air. Other instruments are currently used to detect low levels of \C3{\F}8 vapor leaking into the \N2 environmental gas surrounding the ATLAS silicon tracker. A long-duration continuous study of more than a year has demonstrated a sensitivity to mixture variation of better than 5.10^-5. [ABSTRACT FROM PUBLISHER]

Published
2014
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