Multiple Loop Heat Pipe Radiator for Variable Heat Rejection in Future Spacecraft

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dc.creatorVelson, Nathan Van
dc.creatorTarau, Calin
dc.creatorDeChristopher, Mike
dc.creatorAnderson, William G.
dc.date.accessioned2015-10-27T15:38:21Z
dc.date.available2015-10-27T15:38:21Z
dc.date.issued2015-07-12
dc.descriptionBellevue, Washington
dc.descriptionNathan Van Velson, Advanced Cooling Technologies, Inc., USA
dc.descriptionCalin Tarau, Advanced Cooling Technologies, Inc., USA
dc.descriptionMike DeChristopher, Advanced Cooling Technologies, Inc., USA
dc.descriptionWilliam G. Anderson, Advanced Cooling Technologies, Inc., USA
dc.descriptionThe 45th International Conference on Environmental Systems was held in Bellevue, Washington, USA on 12 July 2015 through 16 July 2015.
dc.description.abstractAs NASA refocuses its human mission ambitions to colder areas of exploration beyond Low Earth Orbit, the need for improved variable heat rejection thermal control systems increases. To account for large variations in heat loads and environment temperatures, a thermal control system with a large turndown ratio is required. This paper presents a variable heat rejection system that uses multiple Loop Heat Pipes (LHPs) to reject large heat loads from a single-phase pumped loop, with high turndown ratios. A novel method of LHP control through local flow rate modulation of the single-phase fluid is developed and demonstrated. Systematic Thermal Desktop modeling of multiple LHP systems was performed to demonstrate the potential of this method. A modeled 2.5 kW three LHP system was shown to have a turndown ratio of 10:1 at a sink temperature of -41°C K and a turndown of 1.5:1 at a sink temperature of -269°C. Finally, an experimental study of a two-LHP system was performed to support the conclusions of the modeling effort.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.otherICES-2015-052
dc.identifier.urihttp://hdl.handle.net/2346/64350
dc.language.isoengen_US
dc.publisher45th International Conference on Environmental Systemsen_US
dc.titleMultiple Loop Heat Pipe Radiator for Variable Heat Rejection in Future Spacecraften_US
dc.typePresentationen_US

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