A 2-shell passes and 4-tube passes heat exchanger is used to heat glycerin from20°C to 50°C by hot water, which enters the thin-walled 2-cm-diameter tubesat 80°C and leaves at 40°C (Fig. 13-21). The total length of the tubes in theheat 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 onthe outer surfaces of the tubes.

Given data: Diameter of tube = 2 cm Length of the tubes = 60 m Convection heat transfer coefficient…

Answered: A 2-shell passes and 4-tube passes heat…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A two-shell passes and four-tube passes heat exchanger is used to heat glycerin from 20°C to 50°C by hot water, which enters the thin-walled 2-cmdiameter tubes at 80°C and leaves at 40°C. The total length of the tubes in the heat exchanger is 60 m. The convection heat transfer coefficient is 25 W/m2∙K 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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