[Experimental research on the effects of hydrophobic coating porous plates on heat dissipation of water sublimator].
OBJECTIVE
To investigate the development method of hydrophobic coating porous plates for water sublimator and carry out an experimental study on hydrophobic coating porous plates.


METHODS
Porous plates were coated with Teflon coating solution and a kind of special hydrophobic coating solution. Physical characteristic tests for hydrophobic coating porous plates were conducted. An upgrading breadboard of sublimator was redesigned. Effects of hydrophobic coating porous plates on heat rejection of water sublimator were studied.


RESULTS
Hydrophobic coating porous plate could evidently increase the water retention pressure, but also increase pressure drop of gas permeability in varying degrees. Heat rejection performance of two kinds of coating plates was different. Performance of coating plate with the special hydrophobic coating solution was better.


CONCLUSIONS
Hydrophobic coating porous plate could improve performance of water sublimator by optimizing coating parameters and technics of Teflon coating solution and the special hydrophobic coating solution.
Institute of Space Medico-Engineering, Beijing, China.
Zhi-qiang
ZQ
Wu
Li-ping
LP
Shen
Li-jun
LJ
Han
Pi-sheng
PS
Zhao
Hong-qi
HQ
Feng
D004867:Equipment Design; D018478:Extravehicular Activity; D006358:Hot Temperature; D057927:Hydrophobic and Hydrophilic Interactions; D008021:Life Support Systems / Q000295:instrumentation*; D011138:Polytetrafluoroethylene; D016062:Porosity; D013026:Space Flight / Q000295:instrumentation*; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
D014867:Water; D011138:Polytetrafluoroethylene