Water is to be heated from 20 to 60 0C as it flows through a thick-walled tube having inner and outer diameters of 20 mm and 40 mm, respectively. The tube is equipped with an electrical heating which provides uniform heating throughout the surface of the tube at a rate of 20 kW/m2. Assume that steady-state conditions are achieved and the outer surface of the heater is well insulated.(a) For a mass flow rate of 0,15 kg/s, how long must the tube be to achieve the desired outlet temperature?(b) Calculate the inner surface temperature at the tube inlet.

a) Write the expression for the rate of heating. Here, q̇ represents the heat flux, A represents…

Answered: Water is to be heated from 20 to 60 0C…

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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Water is to be heated from 20 to 60 ⁰C as it flows through a thick-walled tube having inner and outer diameters of 20 mm and 40 mm, respectively. The tube is equipped with an electrical heating which provides uniform heating throughout the surface of the tube at a rate of 20 kW/m². Assume that steady-state conditions are achieved and the outer surface of the heater is well insulated.

(a) For a mass flow rate of 0,15 kg/s, how long must the tube be to achieve the desired outlet temperature?

(b) Calculate the inner surface temperature at the tube inlet.

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