| Autor: |
Buyanov, Yu. L., Zheltov, V. V., Arkhangelskiy, A. Yu. |
| Zdroj: |
Russian Electrical Engineering; Dec2021, Vol. 92 Issue 12, p791-798, 8p |
| Abstrakt: |
High-temperature superconducting cables (HTS cables) cooled with liquid nitrogen are an alternative to traditional cables. The amount of heat supplied from the HTS cable to the cryoagent, as well as the choice of the optimal cryoagent circulation scheme and the option of cooling the superconducting line as a whole, depends on the internal structure of the cable. The paper presents a theoretical model describing the transfer of heat flow through the cylindrical layers of the cable. Analytical equations are obtained that determine the specific linear heat flow to cables of various types: with three separate shielded phases contained in separate cryostats with a common return cryogenic pipeline, with three shielded phases in separate cryostats with the organization of a reverse flow of the cryoagent inside the cryostats, and with three shielded phases located in one cryostat, as well as in a triaxial cable with different cryoagent circulation schemes. For all types of cables, the ratios between the total linear heat fluxes through the thermal insulation of the cryostat and the heat fluxes from the cable have been determined depending on the mass flow rate of liquid nitrogen. Also, a comparative analysis of the relationship between specific heat fluxes, temperatures of the cryoagent after cooling, and hydraulic resistances per unit length of cables has been carried out. The proposed technique makes it possible to evaluate the thermal–hydraulic parameters of the considered cable structures and to choose the most appropriate technical solution. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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