CRITICAL HEAT FLUX IN POOL BOILING--EFFECT OF GEOMETRY AND HEATER CHARACTERISTICS

Technical Report · Thu Dec 21 04:00:00 EST 1961

OSTI ID:4816699

Pinchera, G C

A comparative study was initiated to check the consistency and reliability of the suggested mechanisms and correlations for pool boiling on the basis of available experimental data. As the data present a high degree of scattering, the contribution to this scatter by such parameters as geometry and heater characteristics was investigated. Geometrical parameters such as orientation of the heating surface, heater size, liquid level, boiler shape and size, and heater characteristics such as material, roughness, aging and cleanliness of the surface, and thermal characteristics were considered. The critical heat flux in pool boiling depends essentially on the coolant properties. Another parameter that has some influence is the heater geometry. The size of the heater and, for very thin walls, the thickness have a definite effect on the critical heat flux. Horizontal and sufficiently long vertical tubes seem to give essentially the same values. Some increase in the critical heat flux appears to occur along with the fouling of the heating surface. The critical heat flux is essentially independent of the material for most cases, but inexplicably high values were observed for some materials. (auth)

• Research Organization: Atomics International. Div. of North American Aviation, Inc., Canoga Park, Calif.
• DOE Contract Number: AT(11-1)-GEN-8
• NSA Number: NSA-16-025525
• OSTI ID: 4816699
• Report Number(s): NAA-SR-Memo-6928
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
CLEANING
CONFIGURATION
COOLANTS
CRITICAL HEAT
DIAGRAMS
DISTRIBUTION
EFFICIENCY
ENGINEERING AND EQUIPMENT
HEATING
HIGH TEMPERATURE
METALS
PERFORMANCE
REACTORS
RESEARCH REACTORS
STANDARDS
SURFACES
TEMPERATURE
THICKNESS
TUBES
VESSELS