Development of an experimental small loop heat pipe with polytetrafluoroethylene wicks

Hosei Nagano, Fuyuko Fukuyoshi, Hiroyuki Ogawa, Hiroki Nagai

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

This paper reports the development of an experimental small loop heat pipe with polytetrafluoroethylene (PTFE) wicks. Three kinds of PTFE porous materials were fabricated, and their wick properties were evaluated. It was clarified that the peak pore radii of the PTFE porous materials ranged from 0.8 to 2.2 μm, and their porosities ranged from 27 to 50%. A small loop heat pipe with PTFE wicks was designed using these properties, and an experimental small loop heat pipe, for which the wick in an evaporator is exchangeable, was fabricated. The experimental loop was tested with 1.2 and 2.2 μmPTFE wicks under atmospheric conditions. The test result with a 2.2 μmPTFE wick showed a high operating temperature, possibly due to vapor leak from the evaporator grooves to the compensation chamber. The test results with the 1.2 μm PTFE wick showed a lower operating temperature, lower thermal resistance, and stable operation of the loop heat pipe.

Original languageEnglish
Pages (from-to)547-552
Number of pages6
JournalJournal of thermophysics and heat transfer
Volume25
Issue number4
DOIs
Publication statusPublished - 2011

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Space and Planetary Science

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