Q.

Which of the following has the highest value of overall heat transfer coefficient? 

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a

Feed water heaters 

b

Steam  

 

c

Alcohol condensers 

 

d

Steam  condensers 

 

answer is D.

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Detailed Solution

Feed water heaters have the highest value of overall heat transfer coefficient. It has an overall heat transfer coefficient of 8500  w/m2k, but stream alcohol condensers, and ammonia condensers have heat transfer coefficients of 5000 w/m2k, 630 w/m2k and 1400 w/m2k. 

 

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