Calculation of Two-Phase Convective Heat Transfer Coefficients of Cryogenic Nitrogen Flow in Plate-Fin Type Heat Exchangers

Title
Calculation of Two-Phase Convective Heat Transfer Coefficients of Cryogenic Nitrogen Flow in Plate-Fin Type Heat Exchangers
Author(s)
유걸정모박승하[박승하]
Keywords
GENERALIZED CORRELATION; VERTICAL TUBE; NUCLEATE; REFRIGERANTS; CHANNELS; LIQUIDS; FLUIDS
Issue Date
201405
Publisher
TAYLOR & FRANCIS INC
Citation
HEAT TRANSFER ENGINEERING, v.35, no.6-8, pp.674 - 684
Abstract
The two-phase convective heat transfer coefficients for nitrogen inside the flow path of plate-fin type heat exchangers operating at cryogenic temperatures are calculated using CFX Release 13.0. Using a homogeneous two-phase model, the governing equations are solved to find pressure, velocity, and enthalpy distributions for three types of fin geometries: plain, wavy, and serrated. The results are further processed to evaluate the wall shear stress and heat flux, which in turn yield the friction coefficients and convective heat transfer coefficients. The coefficients are presented as functions of system pressure, flow rate, and local quality. The results can be used for the design of plate-fin type exchangers with the same fin configurations and operating conditions as the calculation.
URI
http://hdl.handle.net/YU.REPOSITORY/32215http://dx.doi.org/10.1080/01457632.2013.837376
ISSN
0145-7632
Appears in Collections:
공과대학 > 기계공학부 > Articles
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