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A high performance cocurrent-flow heat pipe for heat recovery applicationsBy the introduction of a plate-and-tube separator assembly into a heat pipe vapor core, it has been demonstrated that axial transport capacity in reflux mode can be improved by up to a factor of 10. This improvement is largely the result of eliminating the countercurrent shear that commonly limits reflux heat pipe axial capacity. With benzene, axial heat fluxes up to 1800 W/sq cm were obtained in the temperature range 40 to 80 C, while heat flux densities up to 3000 W/sq cm were obtained with R-11 over the temperature range 40 to 80 C. These very high axial capacities compare favorably with liquid metal limits; the sonic limit for liquid sodium, for example, is 3000 W/sq cm at 657 C. Computational models developed for these cocurrent flow heat pipes agreed with experimental data within + or - 25%.
Document ID
Document Type
Conference Paper
Saaski, E. W.
(Sigma Research, Inc. Richland, WA, United States)
Hartl, J. C.
(Sigma Research, Inc. Richland, Wash., United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1980
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 80-1508
Meeting Information
Thermophysics Conference(Snowmass, CO)
Distribution Limits
No Preview Available