Speakers
Description
High-temperature superconducting (HTS) power cables are moving toward large-scale and long-distance applications, placing increasing demands on the efficiency, reliability, and maintainability of cryogenic systems. Conventional cooling architectures generally rely on centralized cryogenic stations and long-distance circulation of subcooled liquid nitrogen. As cable length increases, this approach leads to higher pumping requirements, larger temperature rises along the cable, and increasing system complexity.To address these limitations, this paper proposes a modular distributed cryogenic cooling solution for long-distance HTS power cables. The key idea is to replace long-distance transport of cooling capacity with distributed local refrigeration. Compact cryogenic units are installed along the cable to provide local recooling and circulation. Since practical HTS cable systems inevitably require cable joints, these locations can also be used to integrate standardized cryogenic modules, thereby reducing additional infrastructure requirements.Based on this concept, two system configurations are proposed. In the segmented-loop configuration, each 500 m–1 km cable section operates as an independent liquid-nitrogen circulation loop. In the relay configuration, the liquid-nitrogen flow path remains continuous, while intermediate cryogenic stations provide local recooling and pressure boosting. Compact Stirling-type hybrid pulse-tube cryocoolers and highly integrated reverse-Brayton cryocoolers are considered as candidate refrigeration platforms.By shifting from centralized long-distance cooling to distributed local refrigeration, the proposed solution decouples cryogenic performance from total transmission distance and enables a modular and scalable system architecture.
| Submitters Country | China |
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| Are you a student? | No |
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