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Homework Help: Compressed Air Energy Storage System

  1. Nov 12, 2017 #1
    1. The problem statement, all variables and given/known data
    I have a CAES system that takes air at a pressure of 102.2kPa and temp of 24 degrees C. It is compressed to 85 bar adiabatically at a rate of 168 kg/s. I know that Cp = 1.005 kJ/kgK and Cv = 0.718 kJ/kgK. The question is - determine the amount of work consumed by the compressor in kWh.

    2. Relevant equation
    Unsure
    3. The attempt at a solution
    Totally lost with this question, attempted a solution using -w = (h2-h1) and then U = Q + w, but i dont think i have the required values for that. Any help at all is greatly appreciated.
     
  2. jcsd
  3. Nov 13, 2017 #2

    haruspex

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    Not sure I can answer the question fully, but I know where I would start: find the compressed temperature.
     
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