Boiling heat transfer to subcooled nitrogen from thin wire in narrow space

Yasuyuki Takata; H. Kubota; T. Ito

doi:10.1115/IMECE2002-39064

Boiling heat transfer to subcooled nitrogen from thin wire in narrow space

Yasuyuki Takata, H. Kubota, T. Ito

Thermal Engineering

Research output: Contribution to journal › Conference article › peer-review

Abstract

Boiling heat transfer characteristic of liquid nitrogen was investigated to obtain the basic information on cooling design of high-T_C superconducting transformer which is cooled by subcooled nitrogen to avoid bubble formation. Thin wire of platinum-30%/rodium in diameter of 50μm was used as heater and thermometer. The wire was covered outside with acrylic tube to simulate the practical winding condition and we examined the effect of space restriction on boiling heat transfer characteristics. The subcooling of nitrogen tested was between 0 and 10.4K. The results show that the CHF and MHF increase considerably with the degree of subcooling.

Original language	English
Pages (from-to)	199-204
Number of pages	6
Journal	American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume	372
Issue number	3
DOIs	https://doi.org/10.1115/IMECE2002-39064
Publication status	Published - Dec 1 2002
Event	2002 ASME International Mechanical Engineering Congress and Exposition - New Orleans, LA, United States Duration: Nov 17 2002 → Nov 22 2002

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1115/IMECE2002-39064

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title = "Boiling heat transfer to subcooled nitrogen from thin wire in narrow space",

abstract = "Boiling heat transfer characteristic of liquid nitrogen was investigated to obtain the basic information on cooling design of high-TC superconducting transformer which is cooled by subcooled nitrogen to avoid bubble formation. Thin wire of platinum-30%/rodium in diameter of 50μm was used as heater and thermometer. The wire was covered outside with acrylic tube to simulate the practical winding condition and we examined the effect of space restriction on boiling heat transfer characteristics. The subcooling of nitrogen tested was between 0 and 10.4K. The results show that the CHF and MHF increase considerably with the degree of subcooling.",

author = "Yasuyuki Takata and H. Kubota and T. Ito",

year = "2002",

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TY - JOUR

T1 - Boiling heat transfer to subcooled nitrogen from thin wire in narrow space

AU - Takata, Yasuyuki

AU - Kubota, H.

AU - Ito, T.

PY - 2002/12/1

Y1 - 2002/12/1

N2 - Boiling heat transfer characteristic of liquid nitrogen was investigated to obtain the basic information on cooling design of high-TC superconducting transformer which is cooled by subcooled nitrogen to avoid bubble formation. Thin wire of platinum-30%/rodium in diameter of 50μm was used as heater and thermometer. The wire was covered outside with acrylic tube to simulate the practical winding condition and we examined the effect of space restriction on boiling heat transfer characteristics. The subcooling of nitrogen tested was between 0 and 10.4K. The results show that the CHF and MHF increase considerably with the degree of subcooling.

AB - Boiling heat transfer characteristic of liquid nitrogen was investigated to obtain the basic information on cooling design of high-TC superconducting transformer which is cooled by subcooled nitrogen to avoid bubble formation. Thin wire of platinum-30%/rodium in diameter of 50μm was used as heater and thermometer. The wire was covered outside with acrylic tube to simulate the practical winding condition and we examined the effect of space restriction on boiling heat transfer characteristics. The subcooling of nitrogen tested was between 0 and 10.4K. The results show that the CHF and MHF increase considerably with the degree of subcooling.

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EP - 204

JO - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

JF - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

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T2 - 2002 ASME International Mechanical Engineering Congress and Exposition

Y2 - 17 November 2002 through 22 November 2002

ER -

Boiling heat transfer to subcooled nitrogen from thin wire in narrow space

Abstract

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