Design and Experimental Evaluation on kA-Class HTS Binary Superconducting Current Lead Using a Liquid Nitrogen Bath Under Short-Term Current Test

Kim, Hyung Jun; Lee, Tae Sung; Kim, Jinsub; Ko, Tae Kuk

doi:10.1109/tasc.2013.2292516

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…Much work has been done for the numerical modeling of HTS binary leads. In the beginning, several analytical methods originating from the 1D energy balance equation were developed to derive formulas for the optimal geometrical parameters and minimum heat leakage [31][32][33][34]. An analytical optimization method for the heat exchanger section of vaporcooled (VC) binary leads was introduced by [34].…”

Section: Introductionmentioning

confidence: 99%

“…Second, a thermal-hydraulic CURLEAD code based on the finite difference method (FDM) initially developed by KIT [40] has been applied to predict the operating parameters of kA-class binary current leads in steady mode [41,42] and pulsed mode [43,44]. Third, 2D and 3D models developed by the finite element method are also deployed to obtain detailed local thermal and magnetic field distributions of the final design before fabrication [33,[45][46][47].…”

Section: Introductionmentioning

confidence: 99%

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The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

Zheng

Liu

Song

et al. 2023

Supercond. Sci. Technol.

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A superconducting magnet system is developed for the application of high frequency gyrotrons at XXX. The operation cost for the magnet is dominated by refrigeration power. To reduce the heat load for cryogenic system, a pair of YBCO binary current leads is designed in consideration of the industrial concentration on type II high temperature superconducting (HTS) YBCO material. In this paper, a simulation model is proposed to perform the electromagnetic-thermal coupling analysis of these YBCO binary leads under different operation conditions by combining Partial Element Equivalent Circuit (PEEC) method and Finite Volume Method (FVM). The simulation code can improve computational efficiency and enable high-accuracy coupling between the electromagnetic field and heat transfer process. Under steady state, the heat leakage at 4.2 K cold end of YBCO binary leads depends mainly on the geometric parameters of YBCO tape, especially the cross-sectional area of the copper layer in YBCO tape. The cooling mode and liquid helium level also have a significant impact on the heat leakage level. The optimal outer diameter of the normal copper section is identified, and the optimum value is largely influenced by the effective cooling power imposed on the cold end of the normal copper section. Under transient state, the simulation for charging process and the loss of cooling accident are performed, along with the detailed analysis of the electromagnetic-thermal response features of the leads under these conditions. The results indicate that the YBCO binary current leads possess high thermal stability and an ample time margin for the magnet system to be demagnetized.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

Zheng

Liu

Song

et al. 2023

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Design of Current Lead for 50MVA HTS Transformer

Song

Zhang

Wang

et al. 2014

AMR

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Compared with the conventional transformer, high temperature superconducting (HTS) transformer can effectively improve the efficiency of the system. The current lead of HTS transformer is a main part that leads to leak out heat, and its thermal leakage loss greatly influents the performance of cryogenic system. So it is important to design and optimize the current lead. In this paper, the current lead of a 50MVA HTS transformer is designed, depended on the calculated conclusion of temperature field with FEM method, the optimization of the current lead is carried out to decrease heat losses.

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Design and Experimental Evaluation on kA-Class HTS Binary Superconducting Current Lead Using a Liquid Nitrogen Bath Under Short-Term Current Test

Cited by 2 publications

References 13 publications

The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

The design of YBCO binary current leads and its electromagnetic-thermal coupling analysis based on PEEC and finite volume method

Design of Current Lead for 50MVA HTS Transformer

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