coefficient based on the inner m² degree/W per tube and rmal resistance of the tube wall

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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Idehtify
a) i, ii and iii
b) i and ii
c) ii and ii
d) i and ii
2- A single pass shell and tube heat exchanger, consisting of a bundle of 100 tubes
(inner diameter 25 mm and thickness 2 mm) is used for heating 28 kg/s of water from
25 degree Celsius to 75 degree Celsius with the help of a steam condensing at
atmospheric pressure on the shell side with condensing heat transfer coefficient 5000
W/m? degree. Make calculation for overall heat transfer coefficient based on the inner
area. Take fouling factor on the water side to be 0.002 m² degree/W per tube and
neglect effect of fouling factor on the shell side and thermal resistance of the tube wall
th2
th1 = th2 = 50C
th1
to2
Cols fluid
(water)
te1 =20
a) 647.46 W/m² degree
b) 747.46 W/m? degree
c) 847.46 W/m' degree
d) 947.46 W/m degree
3- Consider the above problem, if the fluid flow rates and the inlet conditions remain
Transcribed Image Text:Idehtify a) i, ii and iii b) i and ii c) ii and ii d) i and ii 2- A single pass shell and tube heat exchanger, consisting of a bundle of 100 tubes (inner diameter 25 mm and thickness 2 mm) is used for heating 28 kg/s of water from 25 degree Celsius to 75 degree Celsius with the help of a steam condensing at atmospheric pressure on the shell side with condensing heat transfer coefficient 5000 W/m? degree. Make calculation for overall heat transfer coefficient based on the inner area. Take fouling factor on the water side to be 0.002 m² degree/W per tube and neglect effect of fouling factor on the shell side and thermal resistance of the tube wall th2 th1 = th2 = 50C th1 to2 Cols fluid (water) te1 =20 a) 647.46 W/m² degree b) 747.46 W/m? degree c) 847.46 W/m' degree d) 947.46 W/m degree 3- Consider the above problem, if the fluid flow rates and the inlet conditions remain
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