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Oil concentration in liquid refrigerants: in situ measurementConcentration d'huile dans les frigorigènes liquides : mesures sur le terrain |
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| Authors: | Eduardo Navarro de Andrade Eric Skowron Victor W Goldschmidt Eckhard A Groll |
| Affiliation: | a Carrier Corporation, One Carrier Parkway, PO Box 4808, Syracuse, NY 13221, USA;b Hughes Space and Communications Company, PO Box 92919, Los Angeles, CA 90009-2919, USA;c Ray W. Herrick Laboratories, School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1077, USA |
| Abstract: | The concentration of oil in refrigerants (while in liquid state) can be measured with an acoustic velocity sensor. The transit time for an acoustic signal can be related to the oil concentration and temperature of the liquid mixture. The performance of the sensor is dependent on the properties of the oil and refrigerant, and their miscibility. In general, a thorough calibration becomes necessary. It is shown in this paper that for concentrations less than 10%, an approximation can be made for the estimate of concentration hence eliminating the need for an elaborate calibration procedure. |
| Keywords: | Refrigerant Lubricant Concentration Measurements AcousticsAuthor Keywords: Frigorigè ne Lubrifiant Concentration Mesure Acoustique |
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