POOL BOILING OF HIGH-FREQUENCY CONDUCTORS

Conference · Mon Jan 01 04:00:00 EST 2001

DOI:https://doi.org/10.1115/IMECE2001/HTD-24159· OSTI ID:975292

Wright, S E ^[1]; Konecni, S ^[2]; Ammerman, C N ^[3]; Sims, J R ^[4]

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1. Spencer E.
2. Snezana
3. Curtt N.
4. James R.

This study presents development of a unique, powerful method for cooling high-frequency, AC conductors that can benefit end users of transformer windings, electrical machine windings, and magnet coils. This method of heat removal involves boiling a dielectric, fluorinert refrigerant that is in direct contact with litz wire conductors. A pool boiling test vessel is constructed, which provides for temperature control of the pool of fluorinert liquid. The test vessel is fitted with viewing ports so that the experiments are observed and studied with the aid of high-speed photography. Tests are performed on a variety of litz wire conductors. The boiling heat transfer coefficient is dependent on the conductor surface roughness. The size of the features on the conductor surface depends on the single-strand wire gage from which the conductor is constructed. All tests are performed with the conductors mounted horizontally. These tests are performed using a DC power supply. The results of these experiments will aid in the design of future cooling systems.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 975292
• Report Number(s): LA-UR-01-2041
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
AVAILABILITY
BOILING
COOLING SYSTEMS
DESIGN
HEAT TRANSFER
MAGNET COILS
MECHANICAL ENGINEERING
PHOTOGRAPHY
POOL BOILING
REFRIGERANTS
REMOVAL
ROUGHNESS
TEMPERATURE CONTROL
TRANSFORMERS