Performance characteristics of the double-wall artery high capacity heat pipe
Abstract
The results of additional tests carried out on the double-wall artery heat pipes show that the condenser temperature drop is significantly reduced by increasing the vapor flow slot area (for a fixed condenser length) or by increasing the external surface area of the condenser (for a fixed vapor slot area geometry). The evaporator heat flux and transport capacity are shown to be significantly reduced by elimination of the fine groove structure on the inside of the outer tube. Theoretical predictions of maximum radial liquid pressure drop in the evaporator, adiabatic, and condenser sections are found to correlate well with observed experimental results. Estimates of evaporator superheats caused by the increased vapor pressure drop inherent in the inner tube vapor slot area restrictions suggest only small superheat differences when compared with the unrestricted open wicks for similar heat fluxes and temperatures.
- Publication:
-
AIAA, Aerospace Sciences Meeting
- Pub Date:
- January 1983
- Bibcode:
- 1983aiaa.meetV....P
- Keywords:
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- Heat Pipes;
- Heat Transfer;
- Performance Tests;
- Condensing;
- Heat Flux;
- Heat Transfer Coefficients;
- Temperature Distribution;
- Working Fluids;
- Fluid Mechanics and Heat Transfer