Minimization of Refrigeration Power for Large Cryogenic Systems
Some cryogenic systems, such as superconducting magnetic energy storage and superconducting generators, require load-bearing supports to transfer forces to a room temperature (warm) structure. It is necessary to minimize the refrigeration power required to overcome heat leaks through the supports in order to improve system efficiency.
KeywordsEntropy Helium Refrigeration
= strut cross-sectional area
= strut cross-sectional area at room temperature
= efficiency constant
= mathematical expression to be used with equation (18) of reference .
= strut length
= cold-end temperature
= hot-end temperature
= heat conducted to cold end
= helium specific heat
= thermal conductivity
= total helium mass flow rate
= helium mass flow rate to the support
= length variable
= liquefied fraction
= normalized stress to room temperature value
= allowable stress at room temperature
= heat of vaporization
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