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Heat transfer from a fluid linear?

  1. Oct 17, 2012 #1
    If I had water at 180 degrees and dropped the temperature to 160 degrees over a heat exchanger, would I have the same BTU output as if I had water at 100 degrees and dropped the temp to 80 degrees? Delta T is 20 degrees for both situations.

    I know if we were talking about Ke related to mass and velocity, and changed the velocity, energy would not trend in a linear fashion. Not sure about heat energy in water though.

    Thanks
     
  2. jcsd
  3. Oct 17, 2012 #2
    If the temperature change is carried out at constant volume, neglecting the effect of temperature on heat capacity, the amount of heat would be the same. The heat capacity does vary a little with temperature, but typically not much. You need to check how much the heat capacity varies over the temperature range of interest.
     
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