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Design and Testing of a New Cooling System using Solid Nitrogen for Pulsed Field Magnetization and Characterization of HTS Bulks

Abstract : Solid Nitrogen (SN2) can provide a uniform and stable cryogenic environment for High Temperature Superconducting (HTS) systems such as bulk samples during their magnetization and/or characterization. In this paper, we are studying a SN2 cooling system consisting of a cryocooler Sumitomo CH-110 and an exchanger in a Liquid Nitrogen (LN2) bath. In order to design this cooling system, an analytical model based on a nodal method coupled to a formulation of the thermal capacity was realized. The model considers the thermal parameters variation as well as the phase change of the Nitrogen. In order to compare our results, we performed a 3D simulation on COMSOL Multiphysics. The performance of the cooling system was evaluated and we estimates that 50 L of LN2 can be cooled down to 20 K in 50 hours
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https://hal.univ-lorraine.fr/hal-03273952
Contributor : Kévin Berger Connect in order to contact the contributor
Submitted on : Friday, September 24, 2021 - 2:24:20 PM
Last modification on : Monday, March 7, 2022 - 10:54:02 AM

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Ghazi Hajiri, Kévin Berger, Jean Lévêque. Design and Testing of a New Cooling System using Solid Nitrogen for Pulsed Field Magnetization and Characterization of HTS Bulks. 7th International Workshop on Numerical Modelling of High Temperature Superconductors (HTS 2020), Kévin Berger (Université de Lorraine - GREEN), Jun 2021, Nancy (Virtual), France. ⟨hal-03273952⟩

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