Earticle

초록

영어

Recently, interest in renewable energy such as solar and wind power has increased as an alternative to fossil fuels. Renewable energy sources such as large wind farms require long-distance power transmission because they are located inland or offshore, far from the city where power is required. High-Temperature Superconducting (HTS) power cables have more than 5 times the transmission capacity and less than one-tenth the transmission loss compared to the existing cables of the same size, enabling largecapacity transmission at low voltage. For commercialization of HTS power cables, unmanned operation and long-distance cooling technology of several kilometers is essential, and pressure drop characteristic is important. The cryostat's spiral corrugation tube is easier to bend, but unlike the round tube, the pressure drop cannot be calculated using the Moody chart. In addition, it is more difficult to predict the pressure drop characteristics due to the irregular surface roughness of the binder wound around the cable core. In this paper, a CFD model of a spiral corrugation tube with a core was designed by referring to the water experiments from previous studies. In the four cases geometry, when the surface roughness of the core was 10mm, most errors were 15% and the maximum errors were 23%. These results will be used as a reference for the design of long-distance HTS power cables.

목차

Abstract
1. INTRODUCTION
2. High Temperature Superconducting power cable
2.1. Structure of HTS power cable
2.2. Spiral corrugation cryostat and core protection layer
2.3. HTS power cable operating limit condition
2.4. Pressure drop of HTS power cable
3. CFD simulation of HTS power cable
3.1. Flow passage on HTS power cable
3.2. Boundary condition and mesh independency test
3.3. Friction factor according to surface roughness of cable core
3.4. Comparison with previous experimental results.
4. Conclusion
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• Youngjun Choi [ Changwon National University, Changwon, Korea ]
• Seokho Kim [ Changwon National University, Changwon, Korea ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537