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Parametric performance of extruded axial grooved heat pipes from 100 to 300 KExtensive performance data derived from tests with an aluminum axial grooved extruded heat pipe is presented for oxygen, methane, ethane, and ammonia as working fluids. The effects of operating temperature, fluid inventory, heat flux, and elevation on the transport capability and the evaporator and condenser film coefficients are measured and compared to theory. The data correlation indicates that, in addition to the viscous pressure drop of the fluid, a vapor induced liquid pressure drop must be taken into account at temperatures near or below the normal boiling point of the fluid. Methane, ethane, and ammonia are all suitable working fluids for this groove geometry; however, oxygen, because of its low static height, is at best marginal in the 100-120 K range.
Document ID
19740057462
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Schlitt, K. R.
Kirkpatrick, J. P.
(NASA Ames Research Center Moffett Field, Calif., United States)
Brennan, P. J.
Date Acquired
August 7, 2013
Publication Date
July 1, 1974
Subject Category
Thermodynamics And Combustion
Report/Patent Number
AIAA PAPER 74-724
Meeting Information
Meeting: Thermophysics and Heat Transfer Conference
Location: Boston, MA
Start Date: July 15, 1974
End Date: July 17, 1974
Sponsors: American Institute of Aeronautics and Astronautics, American Society of Mechanical Engineers
Accession Number
74A40212
Distribution Limits
Public
Copyright
Other

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