QUALITATIVE CALCULATION OF HEAT TRANSFER IN A CYLINDRICAL COMPOSITE CONDUCTOR <font>Cu/NbTi</font>

Cui, Yingmin; Wang, Yin-Shun; Lv, Gang; Guan, Rong-Hua

doi:10.1142/s0217979213610067

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Heat Transfer Equation1

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2016

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“…For the expression for heat capacity, γC, and thermal conductivity, k, of the NbTi and copper as well as the resistivity of copper with temperature, see [8,9].…”

Section: Heat Transfer Equationmentioning

confidence: 99%

Stability test of conduction-cooled LTS/HTS composite coil

Cui

Wang

et al. 2016

Supercond. Sci. Technol.

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A small LTS/HTS composite coil made of NbTi/Cu and YBCO, with an inner diameter of 80 mm, an outer diameter of 88mm, a height of 50 mm, and an inductance of 5.5 μH, was designed to test its heat disturbance performance in a GM cryocooler. For comparison, a conventional LTS coil of a similar size made of NbTi/Cu wire was also tested. Transport current was applied from 50 A to 700 A at 8 K and 8.5 K, respectively. The two coils’ heat disturbance, minimum quench energy and quench propagation velocity performance were investigated and simulated. The results indicate that the LTS/HTS composite coil shows better thermal stability and is more fit for operation in conductive cryocooler systems compared to LTS coils.

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“…For the expression for heat capacity, γC, and thermal conductivity, k, of the NbTi and copper as well as the resistivity of copper with temperature, see [8,9].…”

Section: Heat Transfer Equationmentioning

confidence: 99%