Heat transfer and internal flow characteristics of a coil-inserted rotating heat pipe

To understand the flow pattern and the effect of a coil inside a cylindrical tube on the condensate flow, visualization and heat transfer performance tests were conducted. With the help of a coil inserted acryl tube, axial flow rates were measured to investigate the effect of coil helix angle, rotat...

Full description

Saved in:
Bibliographic Details
Published in:International journal of heat and mass transfer 2001-09, Vol.44 (18), p.3543-3551
Main Authors: Lee, Jin S., Kim, Chul J.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Flow visualization
Heat pipes
Heat transfer
Theoretical studies. Data and constants. Metering
Transition flow
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To understand the flow pattern and the effect of a coil inside a cylindrical tube on the condensate flow, visualization and heat transfer performance tests were conducted. With the help of a coil inserted acryl tube, axial flow rates were measured to investigate the effect of coil helix angle, rotational speeds and fill charge rates. A coil-inserted tube showed a tendency of increasing the axial flow rates, especially at the pool regime. Also increasing the helix angle of coil resulted in the increase of flow rates and resulted in expediting the transition point of annular flow regime. The pumping effects for RHP with an inserted coil resulted in the enhancement of both condensation heat transfer coefficient and heat transport limitation, as obtained in the case of using internal fins. But these effects weakened in the range of higher rotational speeds with the transition of flow regime to annular flow.
ISSN:0017-9310
1879-2189
DOI:10.1016/S0017-9310(00)00317-3