An Effective Cryostat Design of Conduction-Cooled HTS Magnets for a 300-kW-Class Superconducting Induction Heater

Choi, Jung Hye; Lee, Chan-Kyeong; Hwang, Chul-Sang; Sung-Kyu, Kim; Cho, Sang-Ho; Park, Minwon; Yu, In-Keun

doi:10.1109/tasc.2017.2772823

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…Two HTS magnets were assembled with two cryostats with two dual stage Gilfford McMahon (GM) cryo-coolers. Two HTS magnets are connected through cryogenic current lead on the 2nd cooling stage [9]. In the conduction cooling system operation, the total cooling time took 2 days and 14 h. The temperature at the 1st stage of the cryocooler was saturated at 42.3 K. Two HTS magnets' temperatures on the 2nd stage were cooled down and saturated at below 6 K. First, the HTS magnet excitation test was performed without iron cores.…”

Section: Excitation Test Results Of Hts Magnets With Two Iron Coresmentioning

confidence: 99%

Recent development and research activities of induction heater with high-TC superconducting magnets for commercialization

Choi¹,

Lee²,

Cho³

et al. 2018

SN Appl. Sci.

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Supercoil Co., Ltd. had commercialized a 300 kW-class superconducting induction heater (SIH) that is induction heater energized with high temperature superconducting (HTS) magnets on the end of 2017. Supercoil mainly produces many kinds of superconducting magnets and their application devices. Supercoil has a technology to keep thermal stability and reliability in the operation of a superconducting magnet against uneven quench through the metal insulation winding method. The performance test results of the HTS magnet as well as the 300 kW SIH were presented in the paper. Several components on the 300 kW SIH were introduced. Two HTS magnets were installed on the two iron cores and the excitation test results including terminal voltages, magnetic flux density and temperatures of the cryogenic cooling system were presented. The heating test results were shown with several pictures and graphs, and then they were analyzed for the energy efficiency. These results were useful for the commercialization of SIH to heat various metals such as stainless steel, copper and titanium alloys etc.

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Section: Excitation Test Results Of Hts Magnets With Two Iron Coresmentioning

confidence: 99%

Recent development and research activities of induction heater with high-TC superconducting magnets for commercialization

Choi¹,

Lee²,

Cho³

et al. 2018

SN Appl. Sci.

Self Cite

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“…In an ideal case, the AC losses in the magnet is avoided and all the mechanical power generated from one motor is converted to the required thermal power of the billet. Therefore, the energy efficiency of a DC induction heater in the range of 1 MW is expected to be more than 90%, which is primarily determined by the high efficiency of conventional motors (more than 90% or even more than 95%) [18]. During the past decade, a series of research and engineering validation have been carried out to facilitate the commercial adoption of the DC induction heaters in Europe, Korea and China.…”

Section: Introductionmentioning

confidence: 99%

Development and Test of One Commercial Megawatt Superconducting DC Induction Heater With Extra High Energy Efficiency

Dai

Yan

Hong³

et al. 2021

IEEE Access

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“…Suetomi et al tested a no-insulation layer wound version of the winding method [13] which could prove promising in the future. Interest shown by Scheidler and Tallerico at NASA [14] and industrial applications such as an induction heater by Supercoil Co. Ltd. [15] have demonstrated the large potential for NI technology outside of high field generation as well.…”

Section: Introductionmentioning

confidence: 99%

Understanding quench in no-insulation (NI) REBCO magnets through experiments and simulations

Bhattarai

Kim

Radcliff

et al. 2020

Supercond. Sci. Technol.

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Present research on no-insulation (NI) rare earth barium copper oxide (REBCO) magnets have demonstrated their ability to produce high fields due to their compact nature. NI magnets have often been demonstrated to be self-protecting. However, evidence of mechanical damage in recent high field magnets, suggests that there are some issues about quench that must be resolved for this otherwise promising technology. This article attempts to explain multi-physics phenomena occurring during the quench of an NI magnet that can be used to elucidate quench behavior through experiments and simulations. A lumped circuit model is used for the circuit analysis where each coil is modeled as a single inductor with variable quench resistance in series and characteristic contact resistance in parallel. Three case studies have been analyzed: (1) a 3 double pancake (DP) standalone magnet, (2) a 2 DP coil in 31 T background, and (3) a high temperature superconductor/low temperature superconductor (HTS/LTS) hybrid user magnet that consists of a 13 T HTS insert and a 6 T LTS background magnet. Lessons learned from these analyses include: (1) characteristic resistance of NI coil rises during quench with the temperature rise; (2) influence of Hall effect exists on the voltage rise during quench; (3) over-current during quench can over-stress the coil; and (4) quench propagation from one end of the magnet generates significant unbalanced forces. This approach is expected to be used in the preliminary design of an ultra high field (>40 T) user magnet currently under design at the National High Magnetic Field Laboratory.

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An Effective Cryostat Design of Conduction-Cooled HTS Magnets for a 300-kW-Class Superconducting Induction Heater

Cited by 11 publications

References 14 publications

Recent development and research activities of induction heater with high-TC superconducting magnets for commercialization

Recent development and research activities of induction heater with high-TC superconducting magnets for commercialization

Development and Test of One Commercial Megawatt Superconducting DC Induction Heater With Extra High Energy Efficiency

Understanding quench in no-insulation (NI) REBCO magnets through experiments and simulations

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