Experiment Study on Unsteady Frosting of Cryogenic Vertical Plate Surface under Natural Convection Conditions

Shu Ping Chen; Fu Shou Xie; Shu Ting Yao; Hong Yin Han; Zhi Xin Chang

doi:10.4028/www.scientific.net/AMR.516-517.24

Paper Titles

Air Side Heat Transfer Characteristics of Wavy-Finned-Tube in a Forced Draft Direct Air-Cooled Steam Condenser
p.3

Effect of Internal Helical Microfin on Condensation Performance of Two-Phase Closed Thermosyphon
p.9

Effects of Micro-Particle Diameters and Low Fluid Velocities on Effective Thermal Parameters of Micro-Particle Packed Bed as a Biothermal Reactor
p.15

Experiment Study on Unsteady Frosting of Cryogenic Vertical Plate Surface under Natural Convection Conditions
p.24

Integral Analysis of Heat Transfer on Falling Laminar Liquid Film with Constant Heat Flux
p.30

Modeling of Boiling Heat Transfer System and Chaos in Microchannel
p.36

Numerical Simulation of Infrared Signature Emitted by Liquid Rocket Plume Using Wide Band K-Distribution Model
p.41

A Three Dimensional Simulation of M-ICAR Process
p.54

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 516-517Experiment Study on Unsteady Frosting of Cryogenic...

Experiment Study on Unsteady Frosting of Cryogenic Vertical Plate Surface under Natural Convection Conditions

Abstract:

A frosting test bench was designed, and unsteady frosting on vertical plate surface was dynamically described with liquid nitrogen as working medium under natural convection conditions. The variation of frost thickness was analyzed, and the flow state of moist air and temperature distribution near the vertical plate were described. The experimental results show the unsteady frosting of vertical plate surface under natural convection and cryogenic condition actually includes several steps: formation of frost crystals, growth of frost crystals and growth of frost layer. The initial frosting rate is large, but the rate decreases as time goes on until the frost layer thickness is unchanged. Moist air conducts a top-down flow near the vertical plate, and the rest of moist air flows into the main flow. The temperature of moist air decreased systematically along the tangential direction of vertical plate from top to bottom and along the normal direction of vertical plate from far to vertical plate surface.