Heat Transfer and Void Formation During Forced Circulation Boiling of Organic Coolants

Technical Report · Mon Jun 15 04:00:00 EDT 1964

DOI:https://doi.org/10.2172/4066984· OSTI ID:4066984

Bergonzoli, F. ^[1]; Halfen, F. J. ^[1]

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1. North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.

The experimental results of an extensive parameter survey are reported for forced circulation boiling of organic coolants. The observed effect of dissolved gas on the onset of nucleate boiling and on the overall heat transfer behavior of boiling organic coolants is discussed. The boiling heat transfer and void fraction results for degassed coolants are correlated by existing models or modifications of existing models whenever possible. A new model is presented for the correlation of the void fraction data at or near saturation conditions. The possibility of application of this model to other systems and geometries is explored. The effect of system pressure and quality on the slip ratio of organic coolant vapor is illustrated. The tests were conducted in a closed circulation loop at low system pressures (1 to 2 atmospheres). A d. c. resistance heated test section consisting of a vertical, seamless nickel tube of 9/16 in. O. D. with a 0.042 in. wall thickness and having a heated length of 1 2 ft was used in these experiments.

• Research Organization: North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• DOE Contract Number: AT(11-1)-GEN-8
• NSA Number: NSA-18-029839
• OSTI ID: 4066984
• Report Number(s): NAA-SR--8906
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BOILING
CLOSURES
CONFIGURATION
COOLANT LOOPS
CURRENTS
DEGASSING
EQUATIONS
FLUID FLOW
GASES
HEAT TRANSFER
HEATING
NICKEL
NUCLEATE BOILING
ORGANIC COOLANT
PRESSURE
PRODUCTION
RESISTORS
SOLUTIONS
THICKNESS
TUBES
VAPORS