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http://dx.doi.org/10.9725/kstle.2016.32.5.166

Temperature Separation Characteristics of a Vortex Tube Based on the Back Pressure of the Cold Air Exit  

Im, Seokyeon (Department of Automotive Engineering, Tongmyong University)
Publication Information
Tribology and Lubricants / v.32, no.5, 2016 , pp. 166-171 More about this Journal
Abstract
Electric vehicle ownership is expanding for two reasons: its technology features have enhanced fuel economy, and the number of vehicle emissions regulations is increasing. Battery performance has a large influence on the capability of electric vehicles, and even though battery thermal management has been actively researched, specific technological improvements to battery performance are not being presented. For instance, many industrial applications utilize vortex tubes as components for refrigeration machines because of their numerous intrinsic benefits. If electric vehicles incorporate vortex tubes for battery cooling, performance and efficiency advancements are possible. This study uses a counter-flow vortex tube to investigate its temperature separation characteristics, based on the back pressure of the cold air exit and the difference between the inlet and back pressures. The experiment uses a vortex tube with the following parameters: six nozzle holes, a 20 mm inner vortex diameter (D), a 14D tube length, a 0.7D cold exit orifice diameter, and a nozzle area ratio of 0.142. The measurements prove that the temperature difference between the hot air and cold air decreased because of the flow resistance of the hot air and the backflow phenomenon at the cold air exit. The flow resistance causes the temperature difference to decrease, and the back pressure of the cold air exit influences the flow resistance. The results show that the back pressure significantly influences the efficiency of temperature separation.
Keywords
back pressure; energy separation; geometric; temperature separation; vortex tube;
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Times Cited By KSCI : 1  (Citation Analysis)
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