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Alternate high capacity heat pipeThe performance predictions for a fifty foot heat pipe (4 foot evaporator - 46 foot condensor) are discussed. These performance predictions are supported by experimental data for a four foot heat pipe. Both heat pipes have evaporators with axial groove wick structures and condensers with powder metal external artery wick structures. The predicted performance of a rectangular axial groove/external artery heat pipe operating in space is given. Heat transport versus groove width is plotted for 100, 200 and 300 grooves in the evaporator. The curves show that maximum power is achieved for groove widths from 0.040 to 0.053 as the number of grooves varies from 300 to 100. The corresponding range of maximum power is 3150 to 2400 watts. The relationships between groove width and heat pipe evaporate diameter for 100, 200 and 300 grooves in the evaporator are given. A four foot heat pipe having a three foot condenser and one foot evaporator was built and tested. The evaporator wick structure used axial grooves with rectangular cross sections, and the condenser wick structure used powder metal with an external artery configuration. Fabrication drawings are enclosed. The predicted and measured performance for this heat pipe is shown. The agreement between predicted and measured performance is good and therefore substantiates the predicted performance for a fifty foot heat pipe.
Document ID
19870009347
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Voss, F. E. (LTV Aerospace and Defense Co. Dallas, TX, United States)
Date Acquired
September 5, 2013
Publication Date
October 31, 1986
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-CR-171970
REPT-3-14000/6R-45
NAS 1.26:171970
Accession Number
87N18780
Funding Number(s)
CONTRACT_GRANT: NAS9-17327
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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