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Homework Help: Question on feed water heater

  1. Aug 22, 2009 #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.

    2. Relevant equations

    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.)
  2. jcsd
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