Progress in Superconductivity and Cryogenics最新文献_第8页

Delamination behaviors of GdBCO CC tapes under different transverse loading conditions 不同横向加载条件下GdBCO CC带的分层行为

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-09-30 DOI: 10.9714/PSAC.2015.17.3.013

A. Gorospe, Z. Bautista, H. Shin

{"title":"Delamination behaviors of GdBCO CC tapes under different transverse loading conditions","authors":"A. Gorospe, Z. Bautista, H. Shin","doi":"10.9714/PSAC.2015.17.3.013","DOIUrl":"https://doi.org/10.9714/PSAC.2015.17.3.013","url":null,"abstract":"In superconducting coil applications particularly in wet wound coils, coated conductor (CC) tapes are subjected to different type of stresses. These include hoop stress acting along the length of the CC tape and the Lorentz force acting perpendicular to the CC tape’s surface. Since the latter is commonly associated with delamination problem of multi-layered CC tapes, more understanding and attention on the delamination phenomena induced in the case of coil applications are needed. Difference on the coefficient of thermal expansion (CTE) of each constituent layer of the CC tape, the bobbin, and the impregnating materials is the main causes of delamination in CC tapes when subjected to thermal cycling. The CC tape might also experience cyclic loading due to the energizing scheme (on - off) during operation. In the design of degradation-free superconducting coils, therefore, characterization of the delamination behaviors including mechanism and strength in REBCO CC tapes becomes critical. In this study, transverse tensile tests were conducted under different loading conditions using different size of upper anvils on the GdBCO CC tapes. The mechanical and electromechanical delamination strength behaviors of the CC tapes under transverse tensile loading were examined and a two-parameter Weibull distribution analysis was conducted in statistical aspects. As a result, the CC tape showed similar range of mechanical delamination strength regardless of cross-head speed adopted. On the other hand, cyclic loading might have affected the CC tape in both upper anvil sizes adopted.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"17 1","pages":"13-17"},"PeriodicalIF":0.3,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Test and simulation of High-Tc superconducting power charging system for solar energy application 应用于太阳能的高温超导充电系统的试验与仿真

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-09-30 DOI: 10.9714/PSAC.2015.17.3.018

Haeryong Jeon, Y. G. Park, Jeyull Lee, Y. Yoon, Y. Chung, T. Ko

引用次数: 0

Conceptual design of cryogenic turbo expander for 10 kW class reverse Brayton refrigerator 10kw级逆布雷顿制冷机低温涡轮膨胀器概念设计

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-09-30 DOI: 10.9714/PSAC.2015.17.3.041

C. Lee, Dongmin Kim, H. Yang, Seokho Kim

引用次数: 2

Cool-down test of cryogenic cooling system for superconducting fault current limiter 超导故障限流器低温冷却系统的冷却试验

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-09-30 DOI: 10.9714/PSAC.2015.17.3.057

Y. Hong, S. In, H. Yeom, Heesun Kim, Hye-Rim Kim

引用次数: 0

Status of the technology development of large scale HTS generators for wind turbine 风电机组用大型高温超导发电机技术发展现状

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-06-30 DOI: 10.9714/PSAC.2015.17.2.018

T. D. Le, Ji Hyung Kim, D. J. Kim, C. Boo, Ho Min Kim

引用次数: 5

Analysis of the local superconducting properties in YBCO coated conductors with striations 带条纹的YBCO涂层导体局部超导性能分析

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-06-30 DOI: 10.9714/PSAC.2015.17.2.025

M. Kim, Sang-Kook Park, H. Park, H. Ri

{"title":"Analysis of the local superconducting properties in YBCO coated conductors with striations","authors":"M. Kim, Sang-Kook Park, H. Park, H. Ri","doi":"10.9714/PSAC.2015.17.2.025","DOIUrl":"https://doi.org/10.9714/PSAC.2015.17.2.025","url":null,"abstract":"In order to realize economical applications, it is important to reduce the ac loss of 2G high-temperature superconductor coated conductors. It seems to be reasonable that a multi-filamentary wire can decrease the magnetization loss. In this study, we prepared two samples of YBCO coated conductors with striations. We measured local superconducting properties of both samples by using Low Temperature Scanning Laser and Hall Probe Microscopy (LTSLHPM). The distribution of the local critical temperature of samples was analyzed from experimental results of Low Temperature Scanning Laser Microscopy (LTSLM) near the superconducting transition temperature. According to LTSLM results, spatial distributions of the local critical temperature of both samples are homogeneous. The local current density and the local magnetization in samples were explored from measuring stray fields by using Scanning Hall Probe Microscopy (SHPM). From SHPM results, the remanent field pattern of the one bridge sample in an external magnetic field confirms the Bean’s critical state model and the three bridge sample has similar remanent field pattern of the one bridge sample. The local magnetization curve in the three bridge sample was measured from external fields from -500 Oe to 500 Oe. We visualized that the distribution of local hysteresis loss are related in the distribution of the remanent field of the three bridge sample. Although the field dependence of the critical current density must be taken into account, the relation of the local hysteresis loss and the remanent field from Bean’s model was useful.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"17 1","pages":"25-30"},"PeriodicalIF":0.3,"publicationDate":"2015-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A study on the effect of the condition number in the magnetic field mapping of the Air-Core solenoid 条件数对空心螺线管磁场成像影响的研究

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-06-30 DOI: 10.9714/PSAC.2015.17.2.031

Li Huang, Sangjin Lee

{"title":"A study on the effect of the condition number in the magnetic field mapping of the Air-Core solenoid","authors":"Li Huang, Sangjin Lee","doi":"10.9714/PSAC.2015.17.2.031","DOIUrl":"https://doi.org/10.9714/PSAC.2015.17.2.031","url":null,"abstract":"【Mapping is a useful tool in the magnetic field analysis and design. In some specific research area, such as the nuclear magnetic resonance (NMR) or the magnetic resonance imaging (MRI), it is important to map the magnetic field in the interesting space with high accuracy. In this paper, an indirect mapping method in the center volume of an air-core solenoid is presented, based on the solution of the Laplace's equation for the field. Through the mathematical analysis on the mapping calculation, we know that the condition number of the matrix, generated by the measurement points, can greatly affect the error of mapping result. Two different arrangement methods of the measurement points in field mapping are described in this paper: helical cylindrical line (HCL) method and parallel cylindrical line (PCL) method. According to the condition number, the HCL method is recommended to measure the field components using one probe. As a simple example, we mapped the magnetic fields in a MRI main magnet system. Comparing the results in the different methods, it is feasible and convenient to apply the condition number to reduce the error in the field mapping calculation. Finally, some guidelines were presented for the magnetic field mapping in the center volume of the air-core solenoid.】","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"17 1","pages":"31-35"},"PeriodicalIF":0.3,"publicationDate":"2015-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Analysis of an HTS coil for large scale superconducting magnetic energy storage 大型超导磁能存储用高温超导线圈的分析

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-06-30 DOI: 10.9714/PSAC.2015.17.2.045

Ji-Young Lee, Seyeon Lee, Kyeongdal Choi, Sang Ho Park, G. Hong, Sungsoo Kim, Ji-kwang Lee, Woo-Seok Kim

{"title":"Analysis of an HTS coil for large scale superconducting magnetic energy storage","authors":"Ji-Young Lee, Seyeon Lee, Kyeongdal Choi, Sang Ho Park, G. Hong, Sungsoo Kim, Ji-kwang Lee, Woo-Seok Kim","doi":"10.9714/PSAC.2015.17.2.045","DOIUrl":"https://doi.org/10.9714/PSAC.2015.17.2.045","url":null,"abstract":"It has been well known that a toroid is the inevitable shape for a high temperature superconducting (HTS) coil as a component of a large scale superconducting magnetic energy storage system (SMES) because it is the best option to minimize a magnetic field intensity applied perpendicularly to the HTS wires. Even though a perfect toroid coil does not have a perpendicular magnetic field, for a practical toroid coil composed of many HTS pancake coils, some type of perpendicular magnetic field cannot be avoided, which is a major cause of degradation of the HTS wires. In order to suggest an optimum design solution for an HTS SMES system, we need an accurate, fast, and effective calculation for the magnetic field, mechanical stresses, and stored energy. As a calculation method for these criteria, a numerical calculation such as an finite element method (FEM) has usually been adopted. However, a 3-dimensional FEM can involve complicated calculation and can be relatively time consuming, which leads to very inefficient iterations for an optimal design process. In this paper, we suggested an intuitive and effective way to determine the maximum magnetic field intensity in the HTS coil by using an analytic and statistical calculation method. We were able to achieve a remarkable reduction of the calculation time by using this method. The calculation results using this method for sample model coils were compared with those obtained by conventional numerical method to verify the accuracy and availability of this proposed method. After the successful substitution of this calculation method for the proposed design program, a similar method of determining the maximum mechanical stress in the HTS coil will also be studied as a future work.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"17 1","pages":"45-49"},"PeriodicalIF":0.3,"publicationDate":"2015-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HTS Nested magnet wound with 12 mm GdBCO tape and 4.4 mm YBCO tape HTS嵌套磁铁缠绕12毫米GdBCO磁带和4.4毫米YBCO磁带

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-06-30 DOI: 10.9714/PSAC.2015.17.2.050

Myunghun Kang, Myunghwan Ku, G. Cha, H. Lim

引用次数: 0

Statistical analysis for HTS coil considering inhomogeneous Ic distribution of HTS tape 考虑高温超导带Ic分布不均匀的高温超导线圈统计分析

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2015-06-01 DOI: 10.9714/PSAC.2015.17.2.041

H. Jin, Jiho Lee, W. Lee, T. Ko

{"title":"Statistical analysis for HTS coil considering inhomogeneous Ic distribution of HTS tape","authors":"H. Jin, Jiho Lee, W. Lee, T. Ko","doi":"10.9714/PSAC.2015.17.2.041","DOIUrl":"https://doi.org/10.9714/PSAC.2015.17.2.041","url":null,"abstract":"Abstract Critical current of high-temperature superconducting (HTS) coil is influenced by its own self magnetic field. Direction and density distribution of the magnetic field around the coil are fixed after the shape of the coil is decided. If the entire part of the HTS tape has homogeneous I c distribution characteristic, quench would be initiatedin fixed location on the coil. However, the actual HTS tape has in homogeneous I c distribution along the length. If the I c distribution of the HTS tape is known, we can expect the spot within the HTS coil that has the highest probability to initiate the quench. In this paper, I c distribution within the HTS coil under self-field effect is simulated by MATLAB. In the simulation procedure, I c distribution of the entire part of the HTS tape is assumed to follow Gaussian-distribution by central limit theorem. The HTS coil model is divided into several segments, and the critical current of each segment is calculated based on the-generalized Kim model. Single pancake model is simulated and self-field of HTS coil is calculated by Biot-Savart’s law. As a result of simulation, quench-initiating spot in the actual HTS coil can be predicted statistically. And that statistical analysis can help detect or protect the quench of the HTS coil.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"17 1","pages":"41-44"},"PeriodicalIF":0.3,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2