Question on feed water heater

  • #1
1. What is the function of drain cooler in a feed water heater and is there any reason that it is integral within the heat exchanger but some times it is also placed outside the heater.



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3. ok i got to know the function of a drain cooler.it sub cools the extraction steam. but why is it important i couldn't understand. i couldnt get the answer for the construction of drain cooler(wheteher it is integral with the heater or outside the heater.)
 

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