Flooding and heat transfer limits in horizontal and inclined two-phase thermosiphons

Results are presented of experimental studies of the limiting heat fluxes transferred by horizontal and slightly inclined thermosiphons. An optimum filling ratio providing maximum values of the limiting heat fluxes is established. It is shown that if the filling ratio is below its optimum value, the...

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Bibliographic Details
Published in:Experimental thermal and fluid science 1994, Vol.9 (3), p.345-355
Main Authors: Bezrodny, M.K., Podgoretskii, V.M.
Format: Article
Language:English
Subjects:
Applied sciences
Drying
Energy
Energy. Thermal use of fuels
Exact sciences and technology
flooding
Heat transfer
Hydrodynamics
Stability
Theoretical studies. Data and constants. Metering
thermosiphons
Two phase flow
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Summary:Results are presented of experimental studies of the limiting heat fluxes transferred by horizontal and slightly inclined thermosiphons. An optimum filling ratio providing maximum values of the limiting heat fluxes is established. It is shown that if the filling ratio is below its optimum value, there occur heat transfer crises due to an insufficient amount of liquid being delivered into the evaporator and due to drying out of the heating surface. If the filling ratio exceeds its optimum, the heat transfer crisis is the consequence of the loss of the liquid-vapor counterflow stability in the transport zone of the thermosiphon. Generalizations are given with respect to the optimum filling ratio and maximum heat transfer capacity of thermosiphons.
ISSN:0894-1777
1879-2286
DOI:10.1016/0894-1777(94)90037-X