Speaker
Description
Due to merits of low loss, large capacity and compactness, concentric high temperature superconducting (HTS) cable has become an ideal solution to the of large-capacity power transmission in a narrow path. As the three phases in the concentric HTS cable are wounded one-by-one in the same former, the non-superconducting joints are concentrated in a short range. The same cooling method as the normal section will cause local temperature rise and subject to hot spots risks. This paper conducts a systematic study on the cryogenic cooling structure design of the joint of the concentric HTS cable. The heat generation mechanism is analyzed and a heat-flow-electricity coupling model is established. Based on heat transfer enhancement method and computational fluid dynamic (CFD) simulation, the effects of different structure parameters on the temperature rise, flow resistance, and pressure drop of the joint are studied and the optimal cryogenic structure is proposed. The results are of great significance to the safe and stable operation of the joint in engineering application of the concentric HTS power transmission.
| Submitters Country | China |
|---|
