HIGH ACCELERATION FIELD HEAT TRANSFER FOR AUXILIARY SPACE NUCLEAR POWER SYSTEMS. Quarterly Technical Report, September 1, 1963-November 30, 1963

Technical Report · Sat Oct 31 04:00:00 EST 1964

OSTI ID:4067695

Poppendiek, H F; Greene, N D; Sabin, C M; Livett, R K; MacDonald, F R

The influence of radiation on the vaporization of liquid droplets was studied analytically. It was found that for practical conditions, the radiation term was small in comparison to heat conduction through thin vapor films. Vaporization lifetimes of mercury droplets located on a hot, horizontal surface were measured experimentally for a range of wall-saturation temperature differences. A series of different drop geometries and dynamic states was observed. Experimental vaporization lifetimes for wall-saturation temperature differences greater than about 200 deg F compared favorably with analytical values. A series of forced-flow boiling heat transfer experiments was conducted using Freon 11 in a Pyrex tube with a peripheral heating coil. Flow visualization studies were made and quantitative heat transfer data were obtained with this system, thus making it possible to relate flow mechanics to variations in the heat transfer conductance. Six different flow regimes were characterized with this heat transfer system. The new low pressure boiling liquid metal heat transfer system having a Haynes 25 alloy test section was fabricated and assembled; no-load heat loss measurements indicate that less than ten% of the electrical power to the boiler section is lost through the insulation. Experimental and analytical information on forced-flow, saturated boiling heat transfer is interpreted; differences in water and mercury boiling processes are indicated. (auth)

• Research Organization: Geoscience Ltd., Solana Beach, Calif.
• NSA Number: NSA-18-016177
• OSTI ID: 4067695
• Report Number(s): TID-20133; GLR-19
• Country of Publication: United States
• Language: English

Related Subjects

ALLOYS
BOILING
COILS
CONFIGURATION
EFFICIENCY
ELECTRICITY
ENGINEERING
EVAPORATION
FABRICATION
FILMS
FLUID FLOW
FREONS
GLASS
HEAT TRANSFER
HEATING
LIQUID METALS
LIQUIDS
MATHEMATICS
MEASURED VALUES
MERCURY
ORGANIC HALOGEN COMPOUNDS
POWER
POWER PLANTS
REACTORS
SPACE
SURFACES
TESTING
THERMAL CONDUCTIVITY
THERMAL RADIATION
TUBES
VAPORS
VARIATIONS
WATER