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Counterflow double pipe heat exchanger

  1. Mar 1, 2009 #1
    Im just generally reading through the notes for thermal design for a counterflow double pipe heat exchanger.

    Is it possible for all temperatures inlets and outlets to be different for this type of flow arrangement?

    What is confusing me is the temperature profile graph where Th2 appears to be the same temperature as Tc1?
  2. jcsd
  3. Mar 4, 2009 #2
    Yes it is possible. Inlet temperatures for both hot & cold streams depend upon the source(pretty much defined by the problem itself), the outlet temperatures depends on the effectiveness of the unit, which depends on the thermo physical properties properties of fluid, wetted surface area & overall heat transfer coefficient.
    A case when effectiveness of the exchanger is 100%.
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