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.

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.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.1P: 10.1 In a heat exchanger, as shown in the accompanying figure, air flows over brass tubes of 1.8-cm...

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