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Research on Conduction Cooled Binary Current Leads in the Superconducting System

Author: XieJiangBo
Tutor: WangHuiLing
School: Huazhong University of Science and Technology
Course: Refrigeration and Cryogenic Engineering
Keywords: Binary current lead Refrigerator Direct cooling Thermodynamic Analysis
CLC: TB65
Type: Master's thesis
Year: 2007
Downloads: 87
Quote: 0
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Abstract


In a superconducting system , compared with the traditional working fluid cooling superconducting magnets , the direct cooling technique has great advantages . The superconducting electrical system by the current lead room temperature and the power input to the superconducting system , the current leads the main drain heat source , copper lead and high-temperature superconducting materials , binary current leads to reduce this heat leakage . Cryogenic Engineering Institute of Huazhong University of Science and Technology , according to the National High Technology Research and Development Program ( 863 ) high-temperature superconducting magnetic energy system issues task , began to research and design that have a direct cooling technology , highly efficient and reliable high - temperature superconducting magnetic energy storage (SMES) cryogenic cooling system . In this background , the study of the relevant characteristics of the current leads in the direct cooling of superconducting magnetic energy storage system . First described the high-temperature superconducting lead the kind of high-temperature superconducting materials , structure, nature and method of manufacturing , also wrapped silver alloy high-temperature superconducting material properties . Then create a binary current lead thermal model , to determine the actual size of the copper wire , according to how the shut-off point for the minimum heat introduced detailed parameters of the high temperature superconducting lead Northwest Nonferrous Metal Institute analysis of the interfacial thermal resistance on system the influence of the thermal conductivity . Then introduced direct cryogenic cooling superconducting magnetic energy storage system , the design of cryogenic systems , the main consideration the GM refrigerator 's cooling program , the refrigerator with current leads for high thermal conductivity and high insulation to achieve the superconducting magnet cryogenic insulation , as well as the entire low-temperature heat leak . Finally, establish direct cryogenic cooling of superconducting magnetic energy storage system , the study of the experimental features of the current leads . Dynamic changes in the characteristics of the cooling characteristics of the current leads and the load current , and the experimental data analysis and processing . This article made ??work for binary current lead design a theoretical analysis of the calculated and experimental studies support refrigerator cooling system directly .

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CLC: > Industrial Technology > General industrial technology > Refrigeration Engineering > Refrigeration machinery and equipment
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