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Enhancement of heat transfer during boiling of refrigerant R410A and its mixture with oil on tubes with enhanced surface of evaporators of marine refrigerating machines

Author(s): Bukin Vladimir Grigorevich | Ho Viet Hung

Journal: Vestnik of Astrakhan State Technical University. Series: Marine Engineering and Technologies
ISSN 2073-1574

Issue: 2;
Start page: 79;
Date: 2013;
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Keywords: marine refrigerating installations | heat transfer | boiling | refrigerant | evaporator.

The results of the investigation of the heat transfer at nucleate boiling of refrigerant R410A with different oil fractions on the standard finned tube and enhanced tubes are given. The refriger-ant R410A with oil mass fractions 0; 2; 5, and 10 %, respectively was used. The synthetic oil POE Bitzer BSE32 was used as a lubricant. Experiments were conducted at saturation temperatures of –20, –5 and +5 °C. The effect of geometric parameters and oil concentration on the heat transfer coefficient at boiling on different surfaces was investigated.
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