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Homework Help: Archived Coefficient of performance for a refrigerator

  1. Oct 29, 2012 #1
    1. The problem statement, all variables and given/known data

    The COP for heat pumps and refrigerators achieved in the industry is almost 50% of the Carnot limit. Make estimates for the following case:

    For refrigerator to achieve -10°C in the freezer area with an external temperature of 25°C

    2. Relevant equations

    COP for refrigerator = T(low) / [T(high)-T(low)]

    3. The attempt at a solution

    Using this equation, I find that the COP is 7.5, but this seems high. Where have I made a mistake?
  2. jcsd
  3. Oct 15, 2016 #2


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    You calculated the Carnot COP but the problem statement says..

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