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Passive Gas-Gap Heat Switches for Use in Low-Temperature Cryogenic SystemsWe present the current state of development in passive gas-gap heat switches. This type of switch does not require a separate heater to activate heat transfer but, instead, relies upon the warming of one end due to an intrinsic step in a thermodynamic cycle to raise a getter above a threshold temperature. Above this temperature sequestered gas is released to couple both sides of the switch. This enhances the thermodynamic efficiency of the system and reduces the complexity of the control system. Various gas mixtures and getter configurations will be presented.
Document ID
20180004494
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Kimball, Mark O. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shirron, Peter J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Canavan, Edgar R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tuttle, James G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Jahromi, Amir E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
DiPirro, Michael J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
James, Bryan L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sampson, Michael A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Letmate, Richard V. (Bastion Technologies, Inc. Lanham, MD, United States)
Date Acquired
August 16, 2018
Publication Date
July 9, 2017
Subject Category
Engineering (General)
Report/Patent Number
GSFC-E-DAA-TN57172
Meeting Information
Meeting: CRYOGENIC Engineering Conference/ International Cryogenic MATERIALS Conference (CEC/ICMC 2017)
Location: Madison WI
Country: United States
Start Date: July 9, 2017
End Date: July 13, 2017
Sponsors: Institute of Physics
Funding Number(s)
CONTRACT_GRANT: NNG15CR64C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Gas-gap
Cryogenic
Heat Switch

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