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Fluorescent paint for determination on the effective thermal conductivity of YBCO coated conductor
Superconductor Science and Technology ( IF 3.7 ) Pub Date : 2021-02-05 , DOI: 10.1088/1361-6668/abc2a6
Yingbo Li 1, 2 , Yanbin Ma 1, 2 , Cong Liu 1, 2 , Xingyi Zhang 1, 2 , Huadong Yong 1, 2 , You-He Zhou 1, 2
Affiliation  

Recently, YBa2Cu3O7−x coated conductor (YBCO CC) has been developed intensively for different applications including power cables and high-filed magnets. Of all its physical properties, the thermal conductivity of the YBCO CC is considered as one of the most important parameters in guiding the temperature distribution, heat flux, and prediction of quench propagation. To accurately predict this property, a thermometry technique of high-speed fluorescent thermal imaging is introduced to monitor heat diffusion of commercial YBCO CCs in real time based on the Europium tris[3-(trifluoromethylhydroxymethylene)-(+)-camphorate] (EuTFC) in this study. We propose a new imaging process to eliminate the influences of background intensity and non-uniform illumination on the calibration results accompanying with good accuracy of measurement. And the fluorescence performances are evaluated by static and dynamic calibration experiments. The experimental results show that the photoluminescence of EuTFC has excellent photostability and temperature dependence, and there is no hysteresis in the temperature response when comparing with the PT100 measurements. Subsequently, four kinds of commonly used theoretical models of thermal conductivity and the corresponding calculation curves of the YBCO CC are presented. Finally, the numerical simulation based on the theoretical models has been conducted to reproduce the transient heat conduction process. The simulation results show that the transient heat conduction predicted by the Maxwell’s equivalent model show the best agreement compared with experimental results.



中文翻译:

荧光涂料,用于测定YBCO涂层导体的有效导热系数

最近,YBa 2 Cu 3 O 7-x涂层导体(YBCO CC)已针对包括电缆和高强度磁铁在内的不同应用进行了广泛开发。在其所有物理特性中,YBCO CC的导热系数被认为是指导温度分布,热通量和淬火传播预测的最重要参数之一。为了准确地预测此特性,引入了高速荧光热成像测温技术,以基于三[3-(三氟甲基羟甲基)-(+)-樟脑phor](EuTFC)实时监测商业YBCO CC的热扩散。在这个研究中。我们提出了一种新的成像过程,以消除背景强度和照明不均匀对校准结果的影响,同时具有良好的测量精度。并通过静态和动态校准实验评估了荧光性能。实验结果表明,EuTFC的光致发光具有出色的光稳定性和温度依赖性,与PT100测量结果相比,温度响应没有滞后现象。随后,给出了四种常用的导热系数理论模型以及YBCO CC的相应计算曲线。最后,基于理论模型进行了数值模拟,以再现瞬态热传导过程。仿真结果表明,与实验结果相比,麦克斯韦等效模型预测的瞬态导热效果最佳。实验结果表明,EuTFC的光致发光具有出色的光稳定性和温度依赖性,与PT100测量结果相比,温度响应没有滞后现象。随后,给出了四种常用的导热系数理论模型以及YBCO CC的相应计算曲线。最后,基于理论模型进行了数值模拟,以再现瞬态热传导过程。仿真结果表明,与实验结果相比,麦克斯韦等效模型预测的瞬态导热效果最佳。实验结果表明,EuTFC的光致发光具有出色的光稳定性和温度依赖性,与PT100测量结果相比,温度响应没有滞后现象。随后,给出了四种常用的导热系数理论模型以及YBCO CC的相应计算曲线。最后,基于理论模型进行了数值模拟,以再现瞬态热传导过程。仿真结果表明,与实验结果相比,麦克斯韦等效模型预测的瞬态导热效果最佳。与PT100测量结果相比,温度响应没有滞后现象。随后,给出了四种常用的导热系数理论模型以及YBCO CC的相应计算曲线。最后,基于理论模型进行了数值模拟,以再现瞬态热传导过程。仿真结果表明,与实验结果相比,麦克斯韦等效模型预测的瞬态导热效果最佳。与PT100测量结果相比,温度响应没有滞后现象。随后,给出了四种常用的导热系数理论模型以及YBCO CC的相应计算曲线。最后,基于理论模型进行了数值模拟,以再现瞬态热传导过程。仿真结果表明,与实验结果相比,麦克斯韦等效模型预测的瞬态导热效果最佳。进行了基于理论模型的数值模拟,以再现瞬态热传导过程。仿真结果表明,与实验结果相比,麦克斯韦等效模型预测的瞬态导热效果最佳。进行了基于理论模型的数值模拟,以再现瞬态热传导过程。仿真结果表明,与实验结果相比,麦克斯韦等效模型预测的瞬态导热效果最佳。

更新日期:2021-02-05
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