RB5-2 Experimental Results for Large Diameter Heat Recovery Tubes with Transverse Fins

S. S. Tung

Experimental data are presented on heat transfer coefficients and friction factors for ESCOA 6.625-in. (168.3-mm heat recovery tubes with continuous annular fins. The tube bundles were tested with 2, 3, and 4 rows of tubes for isothermal pressure drop and with 3 rows of tubes for heat transfer. The current HTRI correlations, which are based on the data obtained from tubes much smaller than the present tubes, underpredict the pressure drop data by about 30 percent. The HTRI heat transfer correlations predict the magnitude of the data rather well in the experimental range, but with a different slope than that of the experimental curve.