Systems Considerations for Cryogenic Thermal Switch Development
One approach for increasing the reliability of cryogenic cooling systems using mechanical cryocoolers is to connect several cryocoolers in parallel using thermal switches to isolate failed or standby machines. In this paper, simplified analytical thermal models are used to investigate thermal switch performance requirements and evaluate the effect of thermal switches on system efficiency. Results show that switch characteristics such as switching ratio and thermal resistance determine cryocooler performance requirements. In order to minimize system input power requirements switch characteristics must be carefully matched to the configuration of the cryocooler system.
KeywordsHelium Expense Emissivity Boulder Refrigeration
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