HEAT-TRANSFER STUDIES ON SOME STABLE ORGANIC FLUIDS IN A FORCED CONVECTION LOOP

Technical Report · Mon Jul 10 04:00:00 EDT 1961

OSTI ID:4812199

Stone, J P; Ewin, C T; Blachly, C H; Steinkuller, E W; Spann, J R; Walker, B E; Miller, R R

Heat-transfer coefficients were measured for irradiated monoisopropylbiphenyl, tertiary eutectic (biphenyl with two terphenyls), irradiated tertiary eutectic, n-hexadecane, di(2-ethylhexyl) adipate, biphenyl, and monoisopropylbiphenyl heated in a long horizontal tube for the following conditions: bulk-fluid temperatures, 217 to 629 deg F; heattransfer surface temperatures, 248 to 853 deg F; heat fluxes, 33,300 to 486,000 Btu/hr-ft/sup 2/; fluid velocities, 4.6 to 51.7 ft/sec; Reynolds numbers, 11,800 to 402,000; and Prandtl numbers, 4.1 to 24.9. These coefficients were correlated by an equation of the Dittus-Boelter type with an average deviation of plus or minus 5.5 percent. The physical properties of the fluids used for the correlation are included. No fouling of heat-transfer surfaces from decomposition of the polyphenyl fluids was observed in fouling runs up to 76 hours duration. In fouling experiments, the most severe conditions normally were: heat-transfer surface temperature, 850 deg F; bulk-fluid temperature, 600 deg F; and fluid velocity, 5 ft/sec. Component parts of the loop, consisting mainly of commercial"hot-oil" equipment, remained in good condition with a minimum of maintenance after four years of service. (auth)

• Research Organization: Naval Research Lab., Washington, D.C.
• NSA Number: NSA-16-004273
• OSTI ID: 4812199
• Report Number(s): NRL-5675
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AROMATIC HYDROCARBONS
AROMATICS
BIPHENYL
DITTUS-BOELTER EQUATION
ENGINEERING AND EQUIPMENT
FLUID FLOW
FLUIDS
HEAT TRANSFER
HEATING
IMPURITIES
IRRADIATION
MAINTENANCE
MATHEMATICS
OILS
ORGANIC COOLANT
POLYPHENYLS
PRANDTL NUMBER
REYNOLDS NUMBER
STABILITY
SURFACES
TEMPERATURE
TUBES
TURBULENCE
VELOCITY