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Heat Transfer Overall Coefficient

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#1 jam1976


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Posted 24 July 2020 - 05:56 AM

Hi everyone,


I am a total novice in this subject, is there anyone that would be willing to help me out on the below question?


Kind regards jamie




A heat exchanger is to be used to heat a process liquid within the tubes using saturated steam at 100ºC. The tubes have an inside diameter of 20 mm and outside diameter of 22 mm. It is estimated that the inner surface heat transfer coefficient will be 4.2 kW m–2 K–1 and the outer surface heat transfer coefficient will be 15.4 kW m–2 K–1 when the exchanger is clean. In order to allow for possible fouling during use you should assume a fouling factor of 1.12 × 10-4 m2 K W–1 will be applicable.



Estimate: (i) the overall heat transfer coefficient in use


(ii) the heat transfer rate when the relevant average temperature difference between steam and fluid is 50ºC and the heat exchanger has 100 tubes each of 5 m in length

#2 breizh


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Posted 25 July 2020 - 04:51 AM


We don't do homework but we are happy to help ! Let us know your difficulties . 

A link to support you.



Good luck


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