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e water side to be 0.002 m² degree/W per tube and on the shell side and thermal resistance of the tube wall

e water side to be 0.002 m² degree/W per tube and on the shell side and thermal resistance of the tube wall

Elements Of Electromagnetics
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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Home Insert Draw Layout Review View 11 B IU A. a) i, ii and i b) i and ii c) ii and iji d) i and i 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 = 50 C th1 Cols fluid (water) ter -20 a) 647.46 W/m²degree C) 847.46 W/m degree b) 747.46 W/m² degree d) 947.46 W/m² degree 3- Consider the above problem, if the fluid flow rates and the inlet conditions remain unchanged, workout the lowest temperature to which the oil may be cooled by increasing length of the exchanger a) 46.62 degree Celsius c) 66.62 degree Celsius b) 56.62 degree Celsius d) 76.62 degree Celsius 4- On one side of a heat exchanger, air enters at 72.82°C and leaves at 90°C. On the other side of the heat exchanger is condensing steam at one atmosphere. The value for ATg is a) 10 K b) 17.18 K c) 27°C d) 100°C e) None of the above
Transcribed Image Text:Home Insert Draw Layout Review View 11 B IU A. a) i, ii and i b) i and ii c) ii and iji d) i and i 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 = 50 C th1 Cols fluid (water) ter -20 a) 647.46 W/m²degree C) 847.46 W/m degree b) 747.46 W/m² degree d) 947.46 W/m² degree 3- Consider the above problem, if the fluid flow rates and the inlet conditions remain unchanged, workout the lowest temperature to which the oil may be cooled by increasing length of the exchanger a) 46.62 degree Celsius c) 66.62 degree Celsius b) 56.62 degree Celsius d) 76.62 degree Celsius 4- On one side of a heat exchanger, air enters at 72.82°C and leaves at 90°C. On the other side of the heat exchanger is condensing steam at one atmosphere. The value for ATg is a) 10 K b) 17.18 K c) 27°C d) 100°C e) None of the above
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