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Figures of Merit for Multi-stage Cryocoolers
| Content Provider | Semantic Scholar |
|---|---|
| Author | Delmas, Jean Général Kadin, Alan M. Webber, Robert Track, Elie K. |
| Copyright Year | 2010 |
| Abstract | The "coefficient of performance" (CoP) is often used as a measure of efficiency for single-stage cryocoolers, but such a parameter is not well defined for multi-stage cryocoolers. We propose a simple definition of an electrical “figure of merit” (FoM) representative of the distributed refrigeration power of multi-stage cryocoolers, that resolves this issue for applications where heat-sinking of power and signal leads at intermediate stages is an important end-user requirement. Two cases are considered which yield somewhat different results. A Power Lead FoM (PL-FoM) is derived, based on the largest electric current that can be flowed from ambient to the lowest temperature stage. A Signal Lead FoM (SL-FoM) is also derived, based on achieving minimum electrical attenuation on the signal leads. Each FoM represents a temperature-weighted combination of the heat lifts of the various stages. The two FoMs can aid in the selection of an optimal multi-stage cryocooler for operation of superconducting devices, for example. |
| Starting Page | 149 |
| Ending Page | 156 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1063/1.3422329 |
| Alternate Webpage(s) | http://www.hypres.com/wp-content/uploads/2010/12/Figures-of-Merit-for-Multi-Stage-Cryocoolers.pdf |
| Alternate Webpage(s) | http://ieeecsc.org/sites/ieeecsc.org/files/CEC-ST136.pdf |
| Alternate Webpage(s) | https://doi.org/10.1063/1.3422329 |
| Volume Number | 1218 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
