Heat Transfer and Flow Characteristics of Liquid Nitrogen Laminar Fulling Films in Cryogenic Heat Transfer

Abstract:

This paper studies the characteristics of both the dynamic heat and mass transfer of liquid nitrogen thin film which have vital significance to improve heat transfer efficiency and optimize the cryogenic heat exchanger. Liquid nitrogen laminar film flows in the brazed cryogenic heat exchanger with 2.3mm distance between plates. Relationship between the dimensionless thickness and the coefficient of heat convection of liquid nitrogen film is derived. And the impact of rate of vapor content, intensity of interfacial convection heat transfer and Reynolds numbers are calculated and analyzed.

• Periodical: Applied Mechanics and Materials (Volumes 148-149)
• Pages: 1514-1518
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.148-149.1514
• Online since: December 2011
• Authors: Zhi Li, Zhong Min Li, Jun Guo
• Keywords: Cryogenic Heat Exchanger, Efficiency Improvement, Liquid Nitrogen, Thin Film

References

[1] Ye Xuemin, Yan Weiping: Universal formulations of temporal and spatial stabilities of two-dimensional surface waves on evaporating isothermal or condensing liquid films, Proceedings of the CSEE, Vol. 24, (2004), pp.200-205.

DOI: 10.1002/htj.20062

[2] Gimbutis G J, Gimbutyte S S and Sinkunas S S: Heat transfer in a falling liquid film with large curvature, Heat Transfer Reasearch, Vol. 25, (1993), pp.216-219.

DOI: 10.1615/ihtc13.p1.10

[3] Reinhard Wurfel, Nikolai Ostrowski: Experimental inverstgations of heat transfer and pressure drop during the condensation process within plate heat exchangers of the herringbone-type, International Journal of Thermal Sciences, Vol. 25, (2004).

DOI: 10.1016/s1290-0729(03)00099-1

[4] Shmerler J A, Mudawwar I: Local evaporative heat transfer coefficient in turbulent free-falling liquid films, Int．J．Heat Mass Transfer, Vol. 25, (1988), pp.731-742.

DOI: 10.1016/0017-9310(88)90131-7

[5] Chun K R，Seban R A: Heat transfer to evaporating films, Heat Mass Transfer, Vol. 25, (1971), pp.391-396.

DOI: 10.1115/1.3449836

[6] Kutateladze S S, Gogonin I I: Heat Transfer in film condensation of slowly moving vapor, Int. J. Heat Mass Transfer, Vol. 25, (1979), pp.1593-1599.

DOI: 10.1016/0017-9310(79)90075-9

[7] Sabir H，Suen K O, Vinnicombe G A: Invertigation of effects of wave motion on the performance of a falling film absorber, Int．J．Heat Mass Transfer, Vol. 25, (1996), pp.2463-2472.

DOI: 10.1016/0017-9310(95)00336-3

[8] Mitrovic J: Effects of vapor superheat and condensate subcooling on laminar film condensation, Trans．ASME, J．Heat Transfer, Vol. 25, (2000), pp.192-199.

DOI: 10.1115/1.521450