Heat transfer devices with self-rewetting fluids

Yoshiyuki Abe, Takuya Yokoyama, Kotaro Tanaka, Akira Iwasaki

Research output: Contribution to journalConference article

Abstract

The authors have been proposing the utilization of "self-rewetting fluids" as a new phase change heat transfer media, especially in space applications. Self-rewetting fluids show a quite unique thermophysical behavior- an increase in the surface tension with increasing temperature. Since self-rewetting fluids are non-azeotropic compositions of dilute aqueous solutions of alcohols, the Marangoni effects due to both temperature gradient and concentration gradient work in the same direction in the course of liquid/vapor phase change, and induce a strong liquid flow to hotter interface. A series of terrestrial experiments for conventional heat pipes with self-rewetting fluids have been conducted, and compared with those with water as a reference. Appreciable heat transfer performance improvement from water heat pipes was recognized. Furthermore, a series of low gravity experiments for wickless heat pipes with a self-rewetting fluid have also been conducted by using parabolic flights of aircraft. The heat transfer performance of wickless heat pipes in low gravity was evaluated, and superior characteristics was confirmed.

Original languageEnglish
Article numberIMECE2004-61328
Pages (from-to)101-108
Number of pages8
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume375
Issue number2
DOIs
Publication statusPublished - 2004 Jan 1
Event2004 ASME International Mechanical Engineering Congress and Exposition, IMECE - Anaheim, CA, United States
Duration: 2004 Nov 132004 Nov 19

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ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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