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. 13-21). The total length of the tubes in the heat exchanger is 60 m. The convection heat transfer coefficient is 25 W/m2 . °C on the glycerin (shell) side and 160 W/m2. °C on the water (tube) side. De- termine the rate of heat transfer in the heat exchanger (a) before any fouling oc- curs and (b) after fouling with a fouling factor of 0.0006 m2 . °C/W occurs on the outer surfaces of the tubes.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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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. 13-21). The total length of the tubes in the
heat exchanger is 60 m. The convection heat transfer coefficient is 25 W/m2 .
°C on the glycerin (shell) side and 160 W/m2. °C on the water (tube) side. De-
termine the rate of heat transfer in the heat exchanger (a) before any fouling oc-
curs and (b) after fouling with a fouling factor of 0.0006 m2 . °C/W occurs on
the outer surfaces of the tubes.
Transcribed Image Text: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. 13-21). The total length of the tubes in the heat exchanger is 60 m. The convection heat transfer coefficient is 25 W/m2 . °C on the glycerin (shell) side and 160 W/m2. °C on the water (tube) side. De- termine the rate of heat transfer in the heat exchanger (a) before any fouling oc- curs and (b) after fouling with a fouling factor of 0.0006 m2 . °C/W occurs on the outer surfaces of the tubes.
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