ORGANIC COOLANT ESSENTIAL DATA. Quarterly Report No. 6, July 1-SEptember 30, 1962

Technical Report · Mon Oct 01 04:00:00 EDT 1962

OSTI ID:4692576

Ellard, J A; King, C D; Hedley, W H; Moodie, W J; Woo, C -W; Yanko, W H

A revised Benedict-Webb-Rubin equation of state for biphenyl was derived and used for calculations of a thermodynamic network and critical constants. The critical constants were in good agreement with measured values, and the revised equation gave the best description obtained so far for the liquid and critical region. The Bunsen-type isothermal drop calorimeter, constructed for biphenyl and organic coolant liquid heat capacity determinations, was modified to give measurements consistent to 450 deg C in a 0.2%. Calibration drops were completed on the Pt-20% Rh sample at 100 to 500 un. Concent 85% C. The biphenyl data will be used to check the thermodynamic network derived from PVT data and will indicate refined measurements required for establishing a set of confident biphenyl thermodynamic properties. Ortho-Terphenyl PVT measurements were initiated to establish its thermodynamic network. Purification methods for the isomeric terphenyls were developed, and samples, with purities exceeding 99.99%, were prepared for thermodynamic and physical property measurements. Biphenyl liquid and vapor viscosity and thermal conductivity values were calculated in 10 un. Concent 85% F increments from the melting point to at least 850 un. Concent 85% F. A Fortran program, employing derived equations, was written for IBM-704 calculation of these properties. A Fortran program was also written and tested for computer calculation of liquid thermal conductivity from resistance and current measurements obtained with the center wire conductivity cell. Liquid ortho-terphenyl thermal conductivity measurements over 100 to 200 un. Concent 85% C obeyed the relation: k =-0.239 x 10/sup -6/T + 403 x 10/sup -6/ cal/sec-cm- un. Concent 85% K. A 1000-hour run in the test loop, circulating biphenyl vapor at 700 un. Concent 85% F and velocities of 100 and 1000 ft/sec, was initiated to test the stability of the hot biphenyl vapors to chemical deposition on and corrosion and erosion of selected metals. Successful tests could demonstrate feasibility of biphenyl as a turbine working fluid. The test loop was modified to improve performance by installation of temperature recorders in the surge tank and condenser, a heater tube bypass line between the flash tank and auxiliary heater, and a flash tank level indicator. The latter was removed and returned to the manufacturer for correction of inadequate seals. Both liquid and vapor Potter flow meters were overhauled and reinstalled. Erroneous readings of the heater tube wall thermocouples prevented accumulation of heat transfer data. Poor wall-tothermocouple contacts were suspected and correction was unsuccessfully attempted by several rebrazing operations. Adequate methods for brazing wall couples are under development for the new heat transfer tube. Heat flux balances were made and discrepancies were found which may be due to unexpected boiling in the heater tube. (auth)

• Research Organization: Monsanto Research Corp. Dayton Labs., Ohio
• NSA Number: NSA-17-022794
• OSTI ID: 4692576
• Report Number(s): IDO-11003
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
CALORIMETERS
COMPUTERS
CONDENSERS
COOLANT LOOPS
CORROSION
DECOMPOSITION
EQUATIONS
EROSION
ERRORS
FLOWMETERS
FORTRAN
HEAT TRANSFER
HEATING
IBM 704
LIQUIDS
MEASURED VALUES
METALS
ORGANIC COOLANT
PLATINUM
POLYPHENYLS
PROGRAMMING
REACTOR TECHNOLOGY
RECORDING SYSTEMS
RHENIUM
SEALS
SPECIFIC HEAT
STABILITY
TESTING
THERMAL CONDUCTIVITY
THERMOCOUPLES
THERMODYNAMICS
THERMOMETERS
TUBES
TURBINES
USES
VAPORS
VESSELS
VISCOSITY
WIRES