ORNL-1771 - Oak Ridge National Laboratory
ORNL-1771 - Oak Ridge National Laboratory ORNL-1771 - Oak Ridge National Laboratory
J Fig, 3.4. Inconel Forced-Circulation Corrosion Loop. PERIOD ENDING SEPTEMBER IO, 7954 39
ANP QUARTERLY PROGRESS REPORT TEMPERATURE DIFFERENTIAL, 159.2OF REYNOLDS NO. AT 13OO0F, 3730 REYNOLDS NO. AT 1459"F, 4540 FLOW, 0.81 gprn VELOCITY, 5.29 fps MASS FLOW RATE, 0.361 Iblsec LENGTH OF HEATING SECTION, 5.13 ft LENGTH OF COOLING SECTION, 5.86 ft POWER, 17.6 kw CURRENT, 400 amp VOLTAGE, 44 HEATING SECTION 1 ORNL - LR -DWG 3097 0.02 5 -in. WALL INCONEL TUBING Fig. 3.5. Configuration and Design Conditions for lnconel Forced-Circulation Loop to Operate at a Temperature Differential of Approximately 16OOF. A summary of the design dimensions and expected operating conditions for each of the six loops is presented in Table 3.1, which also indicates the current status of each loop. Three methods of heating were studied: electr ical-res i stance, gas- fired furnace, and liquid bath. The liquid bath was discounted because it would require pres- surization of the liquid rneta1,an excessively long heat exchanger,and a large investment. A gas- fired furnace was considered, but lack of operating experience and the high heat flux necessary for the loops indicated the use of electrical heating, with which considerable experience has been ob- tained. A gas-fired furnace is being studied as a possible heat source for a large number of cor- rosion loops. Preliminary calculations of the pressure drop through the loops indicate that the 40 Model LFA pump8 can be used, and thus it will not be necessary to develop a pump. For purposes of preliminary design the following assumptions were made: (1) The specific resis- tivity of molten NaF-ZrF,-UF, (50-46-4 mole %) is so high that the resistance of the electrically heated lnconel tube may be taken as the parallel circuit re~istance.~ (2) Heat transfer to the fluoride mixture may be calculated by relations established for water." (3) A thermal loss equal 'W. 6. McDonald et al., ANP Quar. Prog. Rep. Mar. 10, 1954, ORNL-1692, p 15. n 'A. L. Southern, personal communication. 'OD. F. Salmon, Turbulent Heat Transfer from a Molten Fluoride Salt Mixture to NaK in a Double Tube Heat Exchanger, ORNL-1716 (to be issued).
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J<br />
Fig, 3.4. Inconel Forced-Circulation Corrosion Loop.<br />
PERIOD ENDING SEPTEMBER IO, 7954<br />
39
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