Open AccessExperimental study on heat transfer characteristics of liquid nitrogen through coated transfer line
Author(s) -
S. Bindu,
Aromal,
Kousik Roy
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1355/1/012011
Subject(s) - materials science , liquid nitrogen , coating , heat flux , heat transfer , nitrogen , heat transfer coefficient , composite material , polyurethane , flux (metallurgy) , copper , mass transfer , electrical conductor , critical heat flux , line (geometry) , thermodynamics , metallurgy , chemistry , physics , geometry , organic chemistry , mathematics
The effective and efficient utilisation of cryogen is made possible by optimised transfer lines which ensures reduction in chilldown time and cryogen usage. Cryogenic chill-down experiments were conducted on coated and regular copper tubes. Liquid nitrogen at different mass flux condition was used as the working fluid and Polyurethane coatings belonging to the family of Teflon was used as coating material. The performance of the regular and coated copper tubes at corresponding mass flux were compared. An increase in heat flux and heat transfer coefficient along with reduction in chilldown time was obtained by providing a low thermal conductive coating between the cryogen and wall material.