Heat Pipes with Binary Mixtures and Inverse MARANGONI Effects for Microgravity Applications
- Paper number
IAC-06-A2.3.03
- Author
Prof. Raffaele Savino, University of Naples "Federico II", Italy
- Coauthor
Dr. Nicola Di Francescantonio, University of Naples "Federico II", Italy
- Coauthor
Dr. Raimondo Fortezza, MARS s.r.l., Italy
- Coauthor
Dr. Yoshiyuki Abe, Japan
- Year
2006
- Abstract
Numerical and experimental investigations have been carried out to understand the role of Marangoni effects in heat pipes with dilute aqueous solutions of long-chain alcohols, proposed to replace common pure liquids used in conventional heat pipes. Laboratory measurements of surface tensions have been carried out for a number of binary solutions at different temperatures and concentrations, to identify the most promising two-component mixtures with a non linear dependence of the surface tension with temperature. Fundamental studies on Marangoni flows in binary mixtures, for different experimental configurations of interest, show the potential advantages of these new working fluids. A number of tests have been performed with grooved heat pipes, filled with aqueous solutions with the appropriate alcohol concentrations. The results show improved performances of these heat pipes, when compared with conventional commercial water heat pipes. Microgravity experiments will be carried during parabolic flights and on board an Italian satellite as a microgravity platform to assess the performances of the newly proposed heat pipes.
- Abstract document
- Manuscript document
IAC-06-A2.3.03.pdf (🔒 authorized access only).
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