In a chemical plant a solution of density 1100 kg/m and specific heat capacity 4.6 kJ/kg K is to be heated from 65 "C to 100 "C; the required flow rate of solution is 11.8 kg/s. It is desired to use a tubular heat exchanger, the solution flowing at about 1.2 m/s in 25 mm bore iron tubes, and being heated by wet steam at 115°C. The length of the tubes must not exceed 3.5 m. Taking the inside and outside heat transfer coefficients as 5 and 10 kW/m2 K, and neglecting the thermal resistance of the tube wall, estimate the number of tubes and the number of tube passes required. 16.25

In a chemical plant a solution of density 1100 kg/m and specific heat capacity 4.6 kJ/kg K is to be heated from 65 "C to 100 "C; the required flow rate of solution is 11.8 kg/s. It is desired to use a tubular heat exchanger, the solution flowing at about 1.2 m/s in 25 mm bore iron tubes, and being heated by wet steam at 115°C. The length of the tubes must not exceed 3.5 m. Taking the inside and outside heat transfer coefficients as 5 and 10 kW/m2 K, and neglecting the thermal resistance of the tube wall, estimate the number of tubes and the number of tube passes required. 16.25

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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Concept explainers

Heat Exchangers

Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.

Heat Exchanger

The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.

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In a chemical plant a solution of density 1100 kg/m' and specific heat capacity
4.6 kJ/kg K is to be heated from 65 "C to 100 "C; the required flow rate of solution is
11.8 kg/s. It is desired to use a tubular heat exchanger, the solution flowing at about
1.2 m/s in 25 mm bore iron tubes, and being heated by wet steam at 115°C. The length
of the tubes must not exceed 3.5 m. Taking the inside and outside heat transfer coefficients
as 5 and 10 kW/m K, and neglecting the thermal resistance of the tube wall, estimate
the number of tubes and the number of tube passes required.
16.25

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