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HTS applications demand Gifford-McMahon (GM) cryocoolers with higher cooling capacity and efficiency at relatively higher temperatures. HyMaster has developed a high-efficiency single-stage GM cryocooler (HMR1020) achieving 104.4 W at 20 K, corresponding to a relative Carnot efficiency (rCOP) of 11.5%. Reliability testing is performing currently being performed to ensure long-term product performance.
Based on this large-capacity GM cryocooler, a 20 K supercritical-helium circulation system has been developed, providing rapid precooling and steady cryogenic operation for high-temperature superconducting (HTS) systems. The demo system equips four HMR1020 GM cryocoolers for cooling and a cryogenic turbine fan for helium circulation. This paper presents the system configuration, key design parameters, and preliminary performance testing results.
| Submitters Country | China |
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| Are you a student? | No |
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