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.
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