Скачать или смотреть Multipass Heat Exchanger Analysis | Heating Glycerin | Effect of Fouling

EXAMPLE 11-5 Heating of Glycerin in a Multipass Heat Exchanger A 2-shell passes and 4-tube passes heat exchanger is used to heat glycerin from 20°C to 50°C by hot water, which enters the thin-walled 2-cm-diameter tubes at 80°C and leaves at 40°C (Fig. 11-22). The total length of the tubes in the heat exchanger is 60 m. The convection heat transfer coefficient is 25 W/m2•1 on the glycerin (shell) side and 160 W/m2•K on the water (tube) side. Determine the rate of heat transfer in the heat exchanger (a) before any fouling and (b) after fouling with a fouling factor of 0.0006 m2•K/W occurs on the outer surfaces of the tubes.
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