BOILING OF FREON-114 IN A THREE-FOOT STRAIGHT TUBE EVAPORATOR

Technical Report · Thu Oct 19 04:00:00 EDT 1961

DOI:https://doi.org/10.2172/4824539· OSTI ID:4824539

Allen, C F

Experimental determinations of heat flux were made with Freon-114 flowing by natural circulation through a steamheated vertical tube with and without swirl promoters. The heated length of the 7/8-inch outside diameter copper tube was 35 inches, the saturation temperature of Freon-114 at test- section flow exit 160 deg F, and the heat flux range from 7,000 to 70,000 Btu/hr/ sq ft. Heat flux measurements at specified conditions were compared to determine the degree of fouling and the effect of swirling flow on heat transfer efficiency. Experimental data showed that the circula tion of water-saturated Freon-114 at 200 deg F for 2/2 hours did not produce sufficient steel corrosion products to foul the surface of the evaporator. Swirl promoters were effective in reducing dry-wall vapor binding at the higher heat loads. The 50% increase in maximum heat flux observed was limited by the low liquid-to-vapor ratio of the bulk Freon leaving the evaporator. An increase in input flow to the evaporator by forced circulation or increased liquid heat should produce an additional increase in maximum heat flux. (auth)

• Research Organization: Oak Ridge Gaseous Diffusion Plant, Tenn.
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-15-032294
• OSTI ID: 4824539
• Report Number(s): K-1487
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
CHLORINATED HYDROCARBONS
COPPER
CORROSION
EFFICIENCY
ENGINEERING AND EQUIPMENT
EVAPORATION
FLUID FLOW
FLUORINATED HYDROCARBONS
FREONS
HEAT TRANSFER
HEATING
LABORATORY EQUIPMENT
LIQUIDS
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RESIDUES
SATURATION
STEELS
SURFACES
TUBES
TURBULENCE
VAPORS
WATER