Liquid nitrogen flow in helically corrugated pipes with insertion of high-temperature superconducting power transmission cables

2019 ◽  
Vol 140 ◽  
pp. 88-99 ◽  
Author(s):  
Z.Q. Zuo ◽  
W.B. Jiang ◽  
Z.G. Yu ◽  
Y.H. Huang
Keyword(s):  
High Temperature ◽  
Liquid Nitrogen ◽  
Power Transmission ◽  
Nitrogen Flow ◽  
High Temperature Superconducting

Two Application Issues of High Temperature Superconducting Maglev in the Evacuated Tube Transportation

2011 ◽  
Vol 71-78 ◽  
pp. 4389-4393 ◽  
Author(s):  
Yao Ping Zhang ◽  
Jian Yue Yu ◽  
Yong Zhao ◽  
Ben Lin Liu
Keyword(s):  
High Temperature ◽  
Liquid Nitrogen ◽  
High Reliability ◽  
Relief Valve ◽  
High Temperature Superconducting ◽  
Energy Consuming ◽  
Evacuated Tube Transportation ◽  
Evacuated Tube ◽  
High Temperature Superconducting Maglev ◽  
Stability Energy

Based on some special merits such as self-stability, energy-consuming-efficiency, less pollution, high reliability, and so on, high temperature superconducting maglev (HTSM) is one of the promising potential technologies among present Maglev technologies for the future evacuated tube transportation (ETT). In this paper, the possibility, the merits, and the demerits of the applications of HTSM in ETT system are investigated. Especially, two application issues, liquid nitrogen vessel on the vehicle and isolated gate set in ETT, are discussed and solutions are suggested. On the first issue, this paper suggests to install a pressure relief valve on the sealed liquid nitrogen vessel so as to reduce the liquid nitrogen vaporization in the vacuum tube. As for the second issue, this paper recommends to use HTSM permanent magnet (PM) track structure with a streamline separated gap between the surface of track and the bottom of liquid nitrogen vessel. Those guideway structure could fit to the isolation gate setting in ETT.

Development of a Superconducting Transformer for Rolling Stock

2006 ◽  
Vol 47 ◽  
pp. 204-211
Author(s):  
Hiroyuki Fujimoto ◽  
Hiroshi Hata ◽  
Hiroki Kamijo ◽  
Ken Nagashima ◽  
Kazuya Ikeda ◽  
...  
Keyword(s):  
High Temperature ◽  
Liquid Nitrogen ◽  
High Speed ◽  
Rolling Stock ◽  
Maximum Output ◽  
Superconducting Wire ◽  
High Temperature Superconducting ◽  
Highly Efficient ◽  
Liquid Nitrogen Cooling

Having undertaken studies into a lightweight and highly efficient superconducting transformer for rolling stock, we developed a prototype with a primary winding, four secondary windings and a tertiary winding using Bi-2223 high temperature superconducting wire. Its primary voltage is 25kV, which is widely adopted as the catenary voltage on the world's high-speed lines. We adopted liquid nitrogen cooling, the weight being 1.71t excluding the refrigerator. The maximum output available to maintain superconductivity is 3.5MVA. We also introduce railways in Japan.

The Models of Superconducting Power Facilities: The Effect of Different Tape

2014 ◽  
Vol 960-961 ◽  
pp. 742-745
Author(s):  
Meng Song ◽  
Lu Shun Su ◽  
Xu Zhi Deng ◽  
Li Ren ◽  
Shi Feng Shen ◽  
...  
Keyword(s):  
High Temperature ◽  
Current Density ◽  
Power Transmission ◽  
High Current Density ◽  
High Current ◽  
Electromagnetic Design ◽  
Superconducting Tape ◽  
High Temperature Superconducting

Due to the high current density in 77K, the high temperature superconducting facilities are expected to improve the efficient in power transmission. Superconducting facilities electromagnetic design is highly dependent on the characteristic of the superconducting tape. As a result, the comparison of the effect of different tape in electromagnetic design should be studied. In this paper, several facilities model are used as example to analyze the effect of different tape utilization. The result shows in different application conditions, or, specific benefits are considered, there is a specific tape will be the best choice.

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