This is a continuation of Problem 21. 12. Estimate the fouling resistance for the base case presented in Figure 21. 1(a).

Figure 21.1 (a)

Data from problem 21.12

Operating data taken from the plant shortly following the cleaning of the reboiler tubes show that
\[
T_{\text {in }}=325^{\circ} \mathrm{C}, T_{\text {out }}=293^{\circ} \mathrm{C}, \dot{m}_{s}=1650 \mathrm{~kg} / \mathrm{h}, T_{s}=253^{\circ} \mathrm{C}
\]

Transcribed Image Text:

Tout = 300C B=253 C Steam. mkg/h TB=253C PB = 42 bar Light Oil m =55,300 kg/h Tin=325C Boiler Feed Water Equipment Data: m = 1280 kg/h Tw=27C Total Heat Transfer Area: A = 25.1 m Fraction of Tubes Covered: L/L 0.9 Area Covered: A = 25.1 (0.9) = 22.6 m Thermodynamic Data: Density: p 750 kg/m Light Oil Heat Capacity: 2.48 kJ/kgC H-Hw=H (steam out) - H (water in) = 2680 kJ/kg