Characterization and Testing of Novel Two-Phase Working Fluids for Spacecraft Thermal Management Operating Between 300 Deg. C and 400 Deg. C.
Final rept. Jun 92-Dec 94,
MAINSTREAM ENGINEERING CORP ROCKLEDGE FL CHEMICAL SYSTEMS DIV
Pagination or Media Count:
This project identified and characterized two phase heat pipe working fluids in the 300 to 400 C temperature range for thermal control of a sodium sulfur battery. This project involved the identification, selection, and extensive experimental evaluation of specific compounds from these two chemical families to determine their suitability for this application. Extensive literature reviews, thermophysical property surveys, and surveys of compound availability on the aromatic hydrocarbons and aromatic perfluorocarbons resulted in the selection of six promising compounds for experimental evaluation. Long term thermal stability tests were performed on each of these fluids in stainless steel gravity reflux heat pipes. Thermophysical property measurements were made for the fluids between 300 and 400 C. Specific properties measured included liquid density, liquid viscosity, surface tension, vapor pressure, heat of vaporization, critical point, and melting point. A unique fabrication technique for stainless steel axial grooved heat pipes was also developed.
- Air Conditioning, Heating, Lighting and Ventilating
- Unmanned Spacecraft