A horizontal 1-4 heat exchanger is used to heat gas oil with saturated steam. Assume that \(h_{o}=1,000 \mathrm{Btu} / \mathrm{hr}^{-}-\mathrm{ft}^{2}{ }^{\circ} \mathrm{F}\) for condensing steam and the fouling factor \(=0.004\left(\mathrm{hr}-\mathrm{ft}^{2}{ }^{\circ}{ }^{\circ} \mathrm{F}\right) / \mathrm{Btu}[1 \mathrm{bbl}=42 \mathrm{gal}]\).

(a) For a tube-side velocity of \(6 \mathrm{ft} / \mathrm{sec}\), determine the number and length of tubes and the shell diameter.

(b) Determine the tube-side pressure drop.

Transcribed Image Text:

Fluid Flow rate (bbl/hr) Temperature (F) Pressure (psig) Viscosity (CP) Sp. gr. Thermal conductivity [Btu/(ft-hr-F) Heat capacity (Btu/1b-F) Shell Side Inlet Steam Tube Side Outlet Inlet Outlet condensate Gas oil 1,200 60 150 50 50 60 5.0 1.8 0.840 0.810 0.078 0.083 0.480 The tubes are 1-in. O.D. by 16 BWG on a 1.25-in. square pitch. 0.461