Accession Number : ADA498237


Title :   Spacecraft Thermal Management using Advanced Hybrid Two-Phase Loop Technology


Descriptive Note : Conference paper


Corporate Author : ADVANCED COOLING TECHNOLOGIES INC LANCASTER PA


Personal Author(s) : Park, Chanwoo ; Vallury, Aparna ; Zuo, Jon ; Perez, Jeffrey ; Rogers, Paul


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a498237.pdf


Report Date : Feb 2007


Pagination or Media Count : 10


Abstract : The paper discusses an advanced hybrid two-phase loop technology for spacecraft thermal management. The hybrid loop integrates active mechanical pumping with passive capillary pumping promising a reliable yet high performance cooling system. The advanced evaporator design using porous wick structures was developed for the hybrid loop to enhance boiling heat transfer by passive phase separation. The prototype testing using various hybrid loops and components demonstrated that the hybrid loop was capable of removing high heat fluxes from multiple heat sources with large surface areas up to 135cm . Because of the passive capillary phase separation, the hybrid loop operation doesn't require any active flow control of excess liquid in the evaporator, even at highly transient and asymmetrical heat inputs. These performance results represent significant improvements over state-of-the-art heat pipes, loop heat pipes and evaporative spray cooling devices in terms of performance, robustness and simplicity.


Descriptors :   *SPACECRAFT COMPONENTS , *PUMPING , *TWO PHASE FLOW , *COOLING , CAPILLARY TUBES , TEMPERATURE CONTROL , HEAT PIPES , SYMPOSIA , HEAT TRANSFER


Subject Categories : Marine Engineering
      Thermodynamics
      Unmanned Spacecraft


Distribution Statement : APPROVED FOR PUBLIC RELEASE