High Heat Flux (>50 W/cm^2) Hybrid Constant Conductance Heat Pipes



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48th International Conference on Environmental Systems


Novel hybrid wick aluminum-ammonia constant conductance heat pipes (CCHPs) are developed to handle heat flux requirements for spacecraft thermal control applications. The 5-10 W/cm^2 heat density limitation of aluminum-ammonia grooved heat pipes has been a fundamental limitation in the current design for space applications. The recently demonstrated >50W/cm^2 capability of the hybrid high heat flux heat pipes provides a realistic means of managing the high heat density anticipated for the next generation space designs. The hybrid wick high heat flux aluminum-ammonia CCHP transported a heat load of 275 Watts with heat flux input of > 50 W/cm^2 and with a thermal resistance of 0.015 ºC/W at 0.1 inch adverse elevation. This demonstrates an improvement in heat flux capability of more than 5 times over the standard axial groove aluminum-ammonia CCHP design.


Mohammed Ababneh, Advanced Cooling Technologies, Inc.
Calin Tarau, Advanced Cooling Technologies, Inc.
William Anderson, Advanced Cooling Technologies, Inc.
Jesse Fisher, Lockheed Martin Coherent Technologies
ICES104: Advances in Thermal Control Technology
The 48th International Conference on Environmental Systems was held in Albuquerque, New Mexico, USA on 08 July 2018 through 12 July 2018.


Novel hybrid high heat flux heat pipes, Spacecraft thermal control, Next generation space designs