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http://dx.doi.org/10.6110/KJACR.2018.30.1.024

An Analysis of Heat Transfer and Pressure Drop Characteristics for Optimum Design of Cryogenic Heat Exchanger used for Liquid Nitrogen Cooling  

Ko, Ji Woon (Korea Institute of Industrial Technology)
Jeon, Doong Soon (Korea Institute of Industrial Technology)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.30, no.1, 2018 , pp. 24-32 More about this Journal
Abstract
In this paper, analytical studies were conducted to obtain optimal design factors and analysis parameters of liquid nitrogen cooling exchanger applied in cryogenic refrigerator. The target value of heat transfer rate was more than 1 kW and pressure drop was less than 40 kPa. Design factors of cryogenic heat exchanger included width of channel and configuration of paths. Analytical factors of liquid nitrogen cooling exchanger included temperatures of coolant header surface and inlet liquid nitrogen. The width and number of channels in the design parameters were 0.0050~0.0150 m and 4~8, respectively. The configuration of channel path was 4 ways. Temperatures of coolant header surface and inlet liquid nitrogen in analytical parameters were 74 to 78K and 82 to 86K, respectively. As result, the design factor and analysis parameter satisfying the target values were obtained. The biggest heat transfer rate was 1.36 kW with pressure drop of 32.26 kPa.
Keywords
Cryogenic heat exchanger; Heat transfer; Liquid nitrogen; Pressure drop;
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1 Lim, J. H., Sohn, S. H., Hwang, S. D., Yang, H. S., Kim, D. L., and Ryoo, H. S., 2006, Cooling System for HTS Power Cable of KEPCO, Proceeding of KSME, pp. 163-168.
2 Chang, H. M., Gwak, K. H., Yang, H. S., and Hwang, S. D., 2013, Cross-flow heat exchangers for anti-freezing of liquid nitrogen, Cryogenics, Vol. 57, pp. 122-128.   DOI
3 Jeon, D. S., Mun, J. H., and Kim, Y. L., 2013, A CFD-based Simulations Study on Heat Transfer and Pressure Drop of Cryogenic Heat Exchanger for Cooling Liquid Nitrogen, Proceeding of KSME, pp. 212-213.
4 Mun, J. H., Jeon, D. S., and Kim, Y. L., 2015, Comparison on Heat Transfer and Pressure Drop Characteristics of Cryogenic Heat Exchangers(Type A, B) for Cooling Liquid Nitrogen, Proceeding of KSME, pp. 3900-3904.
5 Posada, A., Kim, Y. I., and Manousiouthakis, V., 2006, On conduction-cooling of a high-temperature superconducting cable, Cryogenics, Vol. 46, pp. 458-467.   DOI
6 Yeom, H. K., Koh, D. Y., Park, S. J., Hong, Y. J., Ko, J. S., and Kim, H. B., 2011, Development state of the HTS Power Cable's Cryogenic Cooling System, Proceeding of KSME, pp. 286-290.