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논문검색

Electric Machines and Systems

Thermal Conductivity Measurement of Insulation Material for Superconducting Application

초록

영어

The thermal properties of insulation material are essential to develop a high-temperature superconducting (HTS) power cable to be operated at around liquid nitrogen temperature. Unlike metallic materials, nonmetallic materials have a high thermal resistance; therefore special attention needs to be paid to estimate heat flow correctly. Thus, we have developed a precise instrument for measuring the thermal conductivity of insulating materials over a temperature range from 40 K to near room temperature using a cryocooler. Firstly, the measurement of thermal conductivity for Teflon is carried out for accuracy confirmation. For a supplied heat flux, the temperature difference between warm and cold side is measured in steady state, from which the thermal conductivity of Teflon is calculated and compared with published result of NIST. In addition, the apparent thermal conductivity of Polypropylene laminated paper (PPLP) is presented and its temperature dependency is discussed.

목차

Ahstract
 1. INTRODUCTION
 2. EXPERIMENTAL APPARATUS
 3. RESULTS AND DISCUSSION
 4. CONCLUSION
 REFERENCES

저자정보

  • Y. S. Choi 최연석. 한국기초과학지원연구원
  • D. L. Kim 김동락. 한국기초과학지원연구원
  • D. W. Shin 신동원. 한국기초과학지원연구원
  • S. D. Hwang 황시돌. 한국전력공사 전력연구원

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