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Show 16 Jordan Loftus ScD. Texaco Inc - August 24. 1989 to pass a heat flux meter (HFH), Nl through 10. Two pipes were placed at the arch level, just below the convection bank, to pass a high velocity thermocouple (HVTC), NIL and 12. The location of the pipes are depicted on Figure 9. 14.0 °API fuel oil was fired. The heat flux meter, conductivity type, consisted of two copper plates separated by a soft iron hollow cylinder set into one end of a water cooled probe. A calcium fluoride window was mounted in front of the probe. The procedure was to enter the probe until its face was in the plane of the leading edges of the tubes. The HDS BXHTPGH simulated the test conditions, matching the HVTC reading at the arch. Results conducted on Test LV3 and LV4 are plotted on Figures 12 LV3 and LV4. In the test LV4 all four burners were fired and in LV3, the bottom 3. The abscissa is the ratio of the actual distance in the direction of firing to the distance to the XY midplane. The large squares are the sink plane radiant incident flux as simulated by BXHTPGH plotted at the midpoint of the zone. The small squares are HFH readings times the probe constant divided by the fraction of radiant energy passing through the window. The calcium fluoride window transmittance was estimated to be 74% based on the exponential wide band model of Edwards 19 for a gas having 8.7% carbon dioxide and 9.6% water. For given value of Z, the highest simulated flux occurred in the bottom row of zones and decreases as the elevation increases. Note in Figures 12 that the four upper small squares corresponding to entry pipes Nl-4 in Figure 9 which lie midway between the 8 large squares in the Y direction. There is a problem in interpreting the goodness of fit since the large squares represent average flux over an area whereas the small are point values. The best fit occurred for a window transmittance of 79%. As a first approximation, the maximum absolute deviation between small squares and the smooth curves was 18.1 % for LV3 N4 reading. The average deviation for the 10 values read for LV3 is 7.8%; LV4, 6.9%. VII. CYHTPGH - Cylindrical Heater CYHTPGH simulates cylindrical upshot heaters (Figure 2). 19. Edward, D.K. "Absorption by Infrared Bands of Carbon Dioxide at Elevated Pressures and Temperatures" J Optical Soc Am, V50 No.6 (June 1960) 617-626 and Edward, D.K., B.J. Flornes, L.X. Galssen and W. Sun, "Correlation of Absorption by Water VApor at Temperatures 300 - 1100 Kelvin" Applied Optics, V4, N6 (June 1965) 715-721. |
