Visualization study on boiling of nitrogen during quench for fault current limiter applications

Kwanwoo Nam; Hyoungku Kang; Chanjoo Lee; Tae Kuk Ko; Bok Yeol Seok

doi:10.1109/TASC.2005.869669

Visualization study on boiling of nitrogen during quench for fault current limiter applications

Kwanwoo Nam, Hyoungku Kang, Chanjoo Lee, Tae Kuk Ko, Bok Yeol Seok

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

For the development of a 13.2 kV/630 A bifilar winding type high-Tc superconducting fault current limiter (SFCL), a visualization study has been conducted to clarify boiling characteristics during the quench of the high-Tc SFCL. A series of experiments was carried out using a stainless steel strip on a G10 plate as a heating element to simulate the quench state of the high-Tc SFCL. A pulse of DC power input was applied to the strip in saturated and subcooled liquid nitrogen. The magnitude of the heat generation was varied from 10 W/cm to 170 W/cm and the period of the heat impulse was fixed at approximately 100 ms. Bubble behavior was observed by a high-speed camera through view ports of a cryostat. The boiling phenomena, the temperature rising of the strip and the recovery time were compared for different power densities and liquid nitrogen operating conditions. The bubble suppression was clearly observed with respect to the degree of subcooling.

Original language	English
Article number	1642951
Pages (from-to)	727-730
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	16
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2005.869669
Publication status	Published - 2006 Jun

Bibliographical note

Funding Information:
Manuscript received September 20, 2005. This work was supported by a grant from the Center for Applied Superconductivity Technology of the 21st Century Frontier R&D program funded by the Ministry of Science and Technology, Republic of Korea.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Visualization study on boiling of nitrogen during quench for fault current limiter applications",

abstract = "For the development of a 13.2 kV/630 A bifilar winding type high-Tc superconducting fault current limiter (SFCL), a visualization study has been conducted to clarify boiling characteristics during the quench of the high-Tc SFCL. A series of experiments was carried out using a stainless steel strip on a G10 plate as a heating element to simulate the quench state of the high-Tc SFCL. A pulse of DC power input was applied to the strip in saturated and subcooled liquid nitrogen. The magnitude of the heat generation was varied from 10 W/cm to 170 W/cm and the period of the heat impulse was fixed at approximately 100 ms. Bubble behavior was observed by a high-speed camera through view ports of a cryostat. The boiling phenomena, the temperature rising of the strip and the recovery time were compared for different power densities and liquid nitrogen operating conditions. The bubble suppression was clearly observed with respect to the degree of subcooling.",

author = "Kwanwoo Nam and Hyoungku Kang and Chanjoo Lee and Ko, {Tae Kuk} and Seok, {Bok Yeol}",

note = "Funding Information: Manuscript received September 20, 2005. This work was supported by a grant from the Center for Applied Superconductivity Technology of the 21st Century Frontier R&D program funded by the Ministry of Science and Technology, Republic of Korea.",

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AU - Ko, Tae Kuk

AU - Seok, Bok Yeol

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N2 - For the development of a 13.2 kV/630 A bifilar winding type high-Tc superconducting fault current limiter (SFCL), a visualization study has been conducted to clarify boiling characteristics during the quench of the high-Tc SFCL. A series of experiments was carried out using a stainless steel strip on a G10 plate as a heating element to simulate the quench state of the high-Tc SFCL. A pulse of DC power input was applied to the strip in saturated and subcooled liquid nitrogen. The magnitude of the heat generation was varied from 10 W/cm to 170 W/cm and the period of the heat impulse was fixed at approximately 100 ms. Bubble behavior was observed by a high-speed camera through view ports of a cryostat. The boiling phenomena, the temperature rising of the strip and the recovery time were compared for different power densities and liquid nitrogen operating conditions. The bubble suppression was clearly observed with respect to the degree of subcooling.

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Visualization study on boiling of nitrogen during quench for fault current limiter applications

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