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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
20170006575
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
Kimball, M. O. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shirron, P. J. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Canavan, E. R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Tuttle, J. G. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Jahromi, A. E. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Dipirro, M. J. (NASA Goddard Space Flight Center Greenbelt, MD United States)
James, B. L. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Sampson, M. A. (Stinger Ghaffarian Technologies, Inc. Greenbelt, MD, United States)
Letmate, R. V. (Applied Technology Associates, Inc. Albuquerque, NM, United States)
Date Acquired
July 17, 2017
Publication Date
July 9, 2017
Subject Category
Fluid Mechanics And Thermodynamics
Engineering (General)
Report/Patent Number
GSFC-E-DAA-TN44199
Report Number: GSFC-E-DAA-TN44199
Meeting Information
Meeting: Joint Cryogenic Engineering Conference and International Cryogenic Materials Conference (CEC/ICMC) 2017
Location: Madison, WI
Country: United States
Start Date: July 9, 2017
End Date: July 13, 2017
Sponsors: Fermilab Particle Astrophysics Center
Funding Number(s)
CONTRACT_GRANT: NNG15CR64C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Heat Switches
conduction
component
low temperaure

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